Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,t...Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,the question of“how to effectively optimize regional ecological network patterns”has become one of the critical issues that urban and rural planning and ecological geography need to address.This study takes Huzhou,Zhejiang Province,China,as the research area,and uses a combination of landscape type transition matrices and landscape pattern indices to analyze the evolution characteristics of green space landscape patterns from 2017 to 2022.Through geographical detectors and GBDT(Gradient Boosting Decision Tree)algorithms,the study explores the driving factors behind the changes in green space landscape patterns.Based on MSPA(Morphological Spatial Pattern Analysis),key ecological sources in Huzhou are extracted.Using a combination of resistance surfaces and gravity models,ecological corridors and networks are constructed.The study also provides suggestions for the evaluation and optimization of ecological network patterns.The aim is to summarize generalizable patterns of green space landscape evolution and methods for constructing and optimizing regional ecological corridor networks,offering insights and references for the improvement of the living environment and the construction of ecological civilization.展开更多
Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new...Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new requirements and challenges pertaining to urban transportation issues.To mitigate urban traffic congestion,enhance the greening rate of the city,and improve the urban environment,the concept of developing urban aerial ecological corridors is proposed.An analysis of the current state of various urban aerial corridors in different cities indicates that aerial ecological corridors effectively enhance connectivity and accessibility between different spaces,representing a significant strategy for addressing the issue of urban traffic congestion.Aerial ecological corridors have the potential to enhance the vertical space within urban environments,increase the greening rate of cities,and promote the physical and mental health of urban residents.Additionally,these corridors can improve the connectivity of habitat patches and address the developmental needs of biodiversity.Consequently,they serve as a crucial foundation for guiding the future transformation of urban development towards a healthier and greener direction.展开更多
Development of a city depends largely on its transportation, and road construction reveals development skeletons of the city. With the aggravation of city pollution, construction of ecological corridor has been put on...Development of a city depends largely on its transportation, and road construction reveals development skeletons of the city. With the aggravation of city pollution, construction of ecological corridor has been put on the agenda of urban ecological construction, against this background, "2 rings and 17 radial lines" of Zhengzhou City were planned. This paper analyzed the plan from the perspectives of role of urban green corridor, planning principle, characteristic building and greening of building facade, and exploration of green corridors integrating pathways, bikeways, bus harbors and green island gas station.展开更多
The practice and research of ecological civilization is a focus of current planning and design,as well as a scientific strategy under the current situation of resource constraint,environmental degradation and ecosyste...The practice and research of ecological civilization is a focus of current planning and design,as well as a scientific strategy under the current situation of resource constraint,environmental degradation and ecosystem degradation.Urban elements such as buildings,green land,farmland,water systems and mountains can be connected by ecological corridors into a green ecological system design.At present,many ecological and environmental problems,such as urban heat island effect,fog and haze,automobile exhaust have a negative effect on the construction of social ecological environment.In order to build a new modern city with prosperous economy,beautiful environment and social civilization,scientific and efficient ecological corridors should be designed to improve the environmental quality of the eco-city,and promote the construction and development of ecological civilization and green cities.Based on the relevant research and specific practices of ecological corridors at home and abroad,combine the needs of the planning and construction of the Yuzhong Ecological Innovation City,and discuss on the connotation and characteristics of ecological corridors,and discuss the key elements of ecological corridor planning.This article will take the ecological corridor planning of Yuzhong Eco-Innovation City as an example.We design ecological corridor based on field investigation,literature and geographic information system..The planning and design of the ecological corridor in the planning area proposed in this paper can provide positive suggestion on the planning and design of the ecological corridor in other ecological innovation cities.展开更多
Addressing the widespread issues of internal fragmentation within protected areas and the neglect of surrounding critical habitat networks,this study aims to develop an assessment framework for the precise identificat...Addressing the widespread issues of internal fragmentation within protected areas and the neglect of surrounding critical habitat networks,this study aims to develop an assessment framework for the precise identification and remediation of regional conservation gaps.To this end,we introduce the Framework for Conservation Priority Identification(FCPI).The framework integrates Morphological Spatial Pattern Analysis(MSPA),the Remote Sensing Ecological Index(RSEI),Circuit Theory,and the Minimum Cumulative Resistance(MCR)model to formulate a multidimensional conservation priority index.This index facilitates the identification of critical ecological network components and enables the dynamic prioritization of conservation efforts.A case study of Fuzhou City from 2014 to 2020 reveals that despite an overall improvement in regional environmental quality,the functionality of core ecological sources has markedly declined.Between 2014 and 2020,the number of ecological sources grew by 76.9%,yet their total area shrank by 13.9%.Concurrently,the number of ecological corridors rose from 27 to 53,extending their total length by 380.23 km,which indicates an intensifying trend of habitat fragmentation.Furthermore,a significant number of crucial ecological network nodes,particularly within Minhou County,lie explicitly outside the existing protected area system.This confirms the presence of conservation gaps and unveils the spatiotemporal dynamics of shifting conservation priorities.The research validates that the proposed FCPI can effectively diagnose the dynamic deficiencies within conservation systems.It offers scientific decisionsupport for local governments,facilitating a transition from isolated conservation efforts towards systematic and comprehensive ecological network governance.展开更多
The rapid explosion of human populations and the associated development of human-dominated landscapes have drastically reduced and fragmented habitat for tigers(Panthera tigris)and leopards(Panthera pardus)across Asia...The rapid explosion of human populations and the associated development of human-dominated landscapes have drastically reduced and fragmented habitat for tigers(Panthera tigris)and leopards(Panthera pardus)across Asia,resulting in multiple small populations.However,Amur tiger(Panthera tigris altaica)habitat in Russia has remained largely interconnected,except for a break between tigers in southwest Primorye and the southern Sikhote-Alin Mountains.This habitat patch in southwest Primorye also retains the last population of Amur leopards(Panthera pardus orientalis).Genetic differentiation of tigers in southwest Primorye and the Sikhote-Alin Mountains along with survey data suggest that habitat fragmentation is limiting movement of tigers and leopards across the Razdolnaya River basin.We looked at historical and recent survey data on tigers and leopards and mapped existing cover types to examine land-use patterns of both large felids and humans in the development strip along the Razdolnaya River.We then used least-cost distance analyses to identify the most effective potential corridor to retain connectivity for large felids between Land of the Leopard National Park and Ussuriskii Zapovednik(Reserve).We identified a single potential corridor that still exists with a total distance of 62.5 km from Land of the Leopard National Park to Ussuriskii Zapovednik,mostly(93%)through forested habitat.We recommend formal recognition of a Razdolnaya ecological corridor and provide specific recommendations for each of 3 proposed management sections.展开更多
The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics a...The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics at different spatial scales,making it difficult to effectively tackle environmental issues.This study focuses on the Changsha–Zhuzhou–Xiangtan urban agglomeration(CZXUA)to construct an ESP from 2 scales:the urban agglomeration and the metropolitan area.First,ecological sources at different scales were identified and optimized using morphological spatial pattern analysis,ecosystem service supply assessment,landscape connectivity evaluation,and ecological demand intensity analysis.Next,spatial principal component analysis was employed to analyze resistance factors across different spatial scales,enabling the construction of a multi-scale landscape resistance surface.Finally,multi-scale ecological corridors were extracted using circuit theory,and the ecological corridors passing through the central urban area were optimized.As a result,176 ecological sources,337 ecological corridors,60 ecological pinch points,and 30 ecological barrier points were identified,forming the overall ESP for the CZXUA.Furthermore,an ecological protection and optimization pattern,described as“One River,Seven Waters,One Heart,and Eight Wedges”,was proposed based on the ESP.This pattern highlights pivotal areas for ecological protection and restoration within the national land space.This study provides a comprehensive example of constructing a multi-scale ecological corridor network and identifying critical areas for ecological protection and restoration.The findings can serve as a reference for special ecological protection planning in urban agglomerations.展开更多
This paper is based on the fieldwork in Xishuang-banna Natioanl Nature Reserve in Yunnan Province of China.GPS data of Asian elephants were collected and analyzed with the remote sensing satellite photos of the region...This paper is based on the fieldwork in Xishuang-banna Natioanl Nature Reserve in Yunnan Province of China.GPS data of Asian elephants were collected and analyzed with the remote sensing satellite photos of the region to estimate the landform physiognomy of different colors.We also analyzed a series of ecological factors includ-ing altitude,landform,relief,villages and roads which affected the distribution and movement of Asian elephants.The results suggested the possibility of designing and estab-lishing corridors in Xishuangbanna National Nature Reserve to protect the population of wild elephants in the region.展开更多
Scientifically constructing an ecological security pattern(ESP)is an important spatial analysis approach to improve ecological functions in arid areas and achieve sustainable development.However,previous research meth...Scientifically constructing an ecological security pattern(ESP)is an important spatial analysis approach to improve ecological functions in arid areas and achieve sustainable development.However,previous research methods ignored the complex trade-offs between ecosystem services in the process of constructing ESP.Taking the mainstream of the Tarim River Basin(MTRB),China as the study area,this study set seven risk scenarios by applying Ordered Weighted Averaging(OWA)model to trade-off the importance of the four ecosystem services adopted by this study(water conservation,carbon storage,habitat quality,and biodiversity conservation),thereby identifying priority protection areas for ecosystem services.And then,this study identified ecological sources by integrating ecosystem service importance with eco-environmental sensitivity.Using circuit theory,the ecological corridors and nodes were extracted to construct the ESP.The results revealed significant spatial heterogeneity in the four ecosystem services across the study area,primarily driven by hydrological gradients and human activity intensity.The ESP of the MTRB included 34 ecological sources with a total area of 1471.38 km^(2),66 ecological corridors with a length of about 1597.45 km,11 ecological pinch points,and 13 ecological barrier points distributed on the ecological corridors.The spatial differentiation of the ESP was obvious,with the upper and middle reaches of the MTRB having a large number of ecological sources and exhibiting higher clustering of ecological corridors compared with the lower reaches.The upper and middle reaches require ecological protection to sustain the existing ecosystem,while the lower reaches need to carry out ecological restoration measures including desertification control.Overall,this study makes up for the shortcomings of constructing ESP simply by spatial superposition of ecosystem service functions and can effectively improve the robustness and stability of ESP construction.展开更多
Land use/cover change(LUCC)constitutes the spatial and temporal patterns of ecological security,and the construction of ecological networks is an effective way to ensure ecological security.Exploring the spatial and t...Land use/cover change(LUCC)constitutes the spatial and temporal patterns of ecological security,and the construction of ecological networks is an effective way to ensure ecological security.Exploring the spatial and temporal change characteristics of ecological network and analyzing the integrated relationship between LUCC and ecological security are crucial for ensuring regional ecological security.Gansu is one of the provinces with fragile ecological environment in China,and rapid changes in land use patterns in recent decades have threatened ecological security.Therefore,taking Gansu Province as the study area,this study simulated its land use pattern in 2050 using patch-generating land use simulation(PLUS)model based on the LUCC trend from 2000 to 2020 and integrated the LUCC into morphological spatial pattern analysis(MSPA)to identify ecological sources and extract the ecological corridors to construct ecological network using circuit theory.The results revealed that,according to the prediction results in 2050,the areas of cultivated land,forest land,grassland,water body,construction land,and unused land would be 63,447.52,39,510.80,148,115.18,4605.21,8368.89,and 161,752.40 km^(2),respectively.The number of ecological sources in Gansu Province would increase to 80,with a total area of 99,927.18 km^(2).The number of ecological corridors would increase to 191,with an estimated total length of 6120.66 km.Both ecological sources and ecological corridors showed a sparse distribution in the northwest and dense distribution in the southeast of the province at the spatial scale.The number of ecological pinch points would reach 312 and the total area would expect to increase to 842.84 km^(2),with the most pronounced increase in the Longdong region.Compared with 2020,the number and area of ecological barriers in 2050 would decrease significantly by 63 and 370.71 km^(2),respectively.In general,based on the prediction results,the connectivity of ecological network of Gansu Province would increase in 2050.To achieve the predicted ecological network in 2050,emphasis should be placed on the protection of cultivated land and ecological land,the establishment of ecological sources in desert areas,the reinforcement of the protection for existing ecological sources,and the construction of ecological corridors to enhance the stability of ecological network.This study provides valuable theoretical support and references for the future construction of ecological networks and regional land resource management decision-making.展开更多
Ecological security patterns are paramount to the advancement of an ecological civilization in China,aiming to enhance the stability and service functions of ecosystems to achieve sustainable regional development.Howe...Ecological security patterns are paramount to the advancement of an ecological civilization in China,aiming to enhance the stability and service functions of ecosystems to achieve sustainable regional development.However,current regional ecological protection efforts have not been effectively integrated into the regional development planning of ecological security pattern.This study systematically assessed the effectiveness of ecological protection projects in Yanchi County,Ningxia Hui Autonomous Region,China,through the evaluation of landscape ecological quality.Based on the evaluation results of landscape ecological quality,this study used morphological pattern analysis(MSPA),minimum cumulative resistance(MCR)model,and gravity model together to construct the ecological security pattern of Yanchi County.The findings revealed that from 1990 to 2020,with the implementation of ecological protection projects started from 2000,the landscape stability of Yanchi County first decreased and then increased,and the intensity of landscape disturbance first intensified but then decreased,indicating an improvement in the landscape ecological quality and a significant enhancement of the ecological environment in Yanchi County.The ecological security pattern of Yanchi County consisted of 10 ecological sources,10 ecological source points,23 ecological corridors,and 27 ecological nodes.The ecological security pattern of Yanchi County exhibited distinct spatial variations,with stronger ecological security observed in the southern part than in northern part of the county.The ecological sources were denser in the southern part than in the northern part of the county,and accordingly,the length of ecological corridors was shorter and denser in the southern than that in the northern part of the county.Based on the spatial distribution of landscape ecological quality and the characteristics of ecological security pattern of Yanchi County in 2020,we suggested Yanchi County to build four zones to optimize the ecological security pattern construction:the Haba Lake ecological conservation zone,the urban ecological planning zone,the ecological environment restoration zone,and the ecological security improvement zone.This study can provide essential guidance for the construction of ecological security pattern in farming-pastoral areas both in China and worldwide.展开更多
Monsoons frequently sweep over the blue waves of the South China Sea,and mangrove respiration empowers the heartbeats of the two marine civilizations of China and Indonesia.In 1950,the seeds of China-Indonesia friends...Monsoons frequently sweep over the blue waves of the South China Sea,and mangrove respiration empowers the heartbeats of the two marine civilizations of China and Indonesia.In 1950,the seeds of China-Indonesia friendship sprouted in the monsoons on the Strait of Malacca.Today,echoing the Belt and Road Initiative,the ecological green corridor jointly built by the two countries is weaving a vibrant tapestry of life along the equator.On the occasion of the 75th anniversary of the establishment of diplomatic relations between China and Indonesia,the“Revitalization of Mangroves”China-Indonesia Dialogue on Sustainable Development took place in Jakarta,Indonesia,on May 19.The event was co-hosted by China International Communications Group(CICG),China Energy Investment Corporation(CHN Energy),and Indonesia’s State Electricity Company(PT PLN).展开更多
Lhasa,one of the world's highest cities,confronts the challenge of harmonizing cultural heritage preservation with ecological protection.Assessing the spatiotemporal dynamics of ecosystem service value(ESV)in its ...Lhasa,one of the world's highest cities,confronts the challenge of harmonizing cultural heritage preservation with ecological protection.Assessing the spatiotemporal dynamics of ecosystem service value(ESV)in its central urban area is therefore critical for informing future urban planning and land management.This study systematically analyzed land use evolution,the spatiotemporal characteristics of ecosystem services,and ecological network construction within Lhasa's central urban area.It integrated multi-source data,including Landsat remote sensing imagery from 2000,2010,and 2023,with multiple modeling methods such as the InVEST model,MaxEnt for cultural service assessment,the Minimum Cumulative Resistance(MCR)model,and circuit theory.Based on these analyses,optimization strategies were proposed.The results indicate that from 2000 to 2023,areas of cultivated land,grassland,and water bodies decreased by 7.47%,6.85%,and 0.68%,respectively,while wetland and forest areas expanded by 1.44%and 0.64%.Construction land exhibited significant expansion(12.94%),leading to an overall ESV reduction of 462.8×10^(5)yuan.Vegetation coverage was identified as the pivotal factor influencing ESV distribution,with higher values concentrated in the Lhasa River Basin and near the Lhalu Wetland,diminishing towards the urban core.Furthermore,spatial autocorrelation analysis revealed significant positive spatial clustering,with low-low aggregation in the eastern and central regions and high-high aggregation in the Lhasa River Basin and its surrounding water bodies.Moreover,based on a comprehensive ecosystem service assessment,11 ecological source sites were identified,primarily in the southwestern mountains and northeastern foothills.A comprehensive resistance surface,incorporating factors such as elevation,Normalized Difference Vegetation Index(NDVI),and land use,facilitated the extraction of 23 potential ecological corridors totaling 124.96 km in length.Topological network analysis indicated high redundancy and connectivity;however,marginal source sites relying on single connections exhibited significant vulnerability to rupture.Additionally,the application of circuit theory identified 30 ecological pinch points(current density≥1.5 A/km^(2))and 23 obstacle points,revealing significant blockages to ecological flow along the Qinghai-Xizang Highway,within the old city,and in other areas of high-intensity human activity.To address the identified network deficiencies—‘scattered cores,fragmented corridors,and insufficient resilience’—this study proposes an optimization strategy conceptualized as‘one vein,three corridors,and multiple cores’.Recommendations for enhancing network resilience include the delineation of ecological protection red lines,the integration of plateau-adapted technologies,and the fostering of community governance mechanisms.This approach aims to provide a scientific basis for constructing an ecological security pattern and promoting sustainable development in plateau cities.Ultimately,this research contributes to the enhancement of ecological well-being in the Himalayan region.展开更多
The construction of an ecological security pattern(ESP)is an important way to ensure regional ecological security and to achieve sustainable regional development.It is also one of the hotspot topics of landscape ecolo...The construction of an ecological security pattern(ESP)is an important way to ensure regional ecological security and to achieve sustainable regional development.It is also one of the hotspot topics of landscape ecology research.This paper identifies the ecological source through the evaluation of the ecosystem service and ecosystem sensitivity of the Lanzhou-Xining(Lan-Xi)urban agglomeration.The minimum cumulative resistance(MCR)model modified by night light data NPP/VIIRS(National Polar-orbiting Operational Environmental Satellite System Preparatory Project/Visible Infrared Imaging Radiometer Suite)was used to measure the relative resistance of the materials and energy circulation between the source areas,and to establish the resistance surface of the ecological source area expansion.Then ecological corridors were identified based on ecological sources and resistance surface.The ecological strategic node is the ecological fragile point in the ecological corridors.The ecological strategic node is identified with hydrological module by superimposing the"ridge line"of cumulative ecological resistance with the ecological corridor.Combined with ecological sources,corridors and strategic nodes,the ESP of the Lan-Xi urban agglomeration can be constructed.The ecological source of the Lan-Xi urban agglomeration accounts for 28.42%of the total area,most of which is distributed within Qinghai Province.The nature reserves in the area are all located within the ecological source area.A total of 41 potential ecological corridors have been identified in the study area.The total length of the potential corridors is 1201.03 km,comprising 23 source corridors and 18 radiation corridors.There are 30 strategic nodes identified in the Lan-Xi urban agglomeration.These locations are the most vulnerable areas of the ecological corridors.Ecological engineering should be applied in the construction of corridors.Affected by the ecological source,the potential ecological corridor extends from the northwest to the southeast,which is basically consistent with the direction trend of the mountains in the region.展开更多
Background:With the increasing fragmentation of landscape induced by rapid urbanization,the construction of ecological networks is of great signifcance to alleviate the degradation of urban habitats and protect natura...Background:With the increasing fragmentation of landscape induced by rapid urbanization,the construction of ecological networks is of great signifcance to alleviate the degradation of urban habitats and protect natural envi‑ronments.However,there is considerable uncertainty when constructing ecological networks,especially the difer‑ent approaches to selecting ecological sources.We used the southern Chinese city of Shenzhen as a study area to construct and optimize ecological networks using a coupling approach.Ecological source areas were extracted using morphological spatial pattern analysis(MSPA)and the landscape index method.Ecological networks were con‑structed using the minimal cumulative resistance(MCR)model and the gravity model.Stepping stones and ecological fault points were added in corridors to optimize the ecological network.Results:Ten core areas with maximum importance patch values were extracted by the landscape index method as ecological source areas according to MSPA,after which corridors between ecological sources were constructed based on the MCR model.The constructed ecological networks were optimized using 35 stepping stones and 17 ecologi‑cal fault points.The optimized ecological networks included 11 important corridors,34 general corridors,and seven potential corridors.The results of corridor landscape-type analysis showed that a suitable ecological corridor is 60 to 200 m wide.Conclusions:Overall,our results imply that ecological source areas can be identifed virtually,and that ecological networks can be signifcantly optimized by combining MSPA and MCR models.These results provide a methodologi‑cal reference for constructing ecological networks,and they will be useful for urban planning and biodiversity protec‑tion in Shenzhen and other similar regions around the world.展开更多
The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and s...The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and spatial planning,this study established a spatial structural pattern of"ecological source-ecological corridor-ecological node"along with methods including landscape connectivity analysis and ecological resistance surface analysis.Taking the ecological space of Xuzhou City,a typical resource-based city,as a case study,this research analyzed the ecological spatial network structure and evaluated the evolution characteristics before judging the breadth threshold value of the ecological corridor and providing planning control strategy.The study found that since the urbanization of Xuzhou City resumed its growth,the quantity of ecological sources,corridors,and nodes have grown along.The resistance of the ecological corridor increases year by year,with the proper breadth threshold value around 100–200 m.The development of an ecological network structure shows a single-polarization evolution characteristic that is high quality and high resistance.展开更多
Taking the lower Yellow River basin as the study area,this study aims to construct ecological networks to mitigate the negative impacts of rapid urbanization on the ecosystem.Ecological sources were identified based o...Taking the lower Yellow River basin as the study area,this study aims to construct ecological networks to mitigate the negative impacts of rapid urbanization on the ecosystem.Ecological sources were identified based on morphological spatial pattern analysis(MSPA),habitat quality and landscape connectivity.The ecological resistance surface was constructed and corrected by integrating natural and anthropogenic factors.The spatial range of ecological corridors and some of their key nodes were identified based on circuit theory.The ecological network(EN)was finally optimized using a similarity search and cost connectivity modules.The results show that the optimized ecological network structure is more stable than before.The EN includes 23 ecological sources with a total area of 5464.8 km^(2)and 30 ecological corridor clusters with a total area of 2205.92 km^(2).Through the internal landscape heterogeneity of the corridor,28 ecological node areas and 75 barrier areas were identified as key protection and restoration areas,with a total area of 78.44 km^(2)and 372.79 km^(2),respectively.Through the construction and optimization of EN,this study identifies key areas for promoting ecological sustainability and provides a useful framework for coordinating regional ecological conservation and economic development.展开更多
Forest thinning and ground cover plant management play crucial roles in habitat enhancement,yet their effects on soil microbiota remain poorly understood.This study examines their impact on soil properties and bacteri...Forest thinning and ground cover plant management play crucial roles in habitat enhancement,yet their effects on soil microbiota remain poorly understood.This study examines their impact on soil properties and bacterial communities in artifcial spruce forests(Picea asperata)within China’s Huangtuliang ecological corridor,a crucial habitat for giant pandas.Thinning signifcantly alters soil pH and total phosphorus(TP)levels,with minimal changes observed in total nitrogen(TN),microbial biomass carbon(MBC)and nitrogen(MBN).The combined effect of thinning and ground cover presence increases soil organic carbon(SOC)to 65.47 g/kg,contrasting with its absence.Thinning enhances the abundance of Proteobacteria,Acidobacteria and Chlorofexi while reducing Actinobacteria.Conversely,ground cover removal decreases Proteobacteria and Bacteroidetes but increases Chlorofexi,Verrucomicrobia and Rokubacteria.These changes lead to reduced bacterial community diversity,as indicated by a lower Shannon diversity index and distinct community composition differences demonstrated through beta-diversity analysis.Soil pH,TP and MBN are crucial in maintaining bacterial community structure,with pH and TP exhibiting the strongest correlations.Network analysis confrms the signifcant infuence of TP and pH on bacterial genera across various phyla.This study reveals the role of stochastic processes in highelevation,low-temperature ecological corridors(R^(2)=0.817),with thinning’s impact varying depending on the ground cover presence,thus enhancing effects post-removal by reducing dispersal limitation(migration rate,m=0.96).These fndings highlight the ecological implications of habitat management in sensitive ecosystems and advance our understanding of microbial dynamics in critical habitats.展开更多
基金Major Program of National Fund of Philosophy and Social Science of China(24&ZD148).
文摘Global climate warming has placed immense pressure on the ecological environment worldwide,and the ecological issues affecting the quality of the living environment have garnered widespread attention.In this context,the question of“how to effectively optimize regional ecological network patterns”has become one of the critical issues that urban and rural planning and ecological geography need to address.This study takes Huzhou,Zhejiang Province,China,as the research area,and uses a combination of landscape type transition matrices and landscape pattern indices to analyze the evolution characteristics of green space landscape patterns from 2017 to 2022.Through geographical detectors and GBDT(Gradient Boosting Decision Tree)algorithms,the study explores the driving factors behind the changes in green space landscape patterns.Based on MSPA(Morphological Spatial Pattern Analysis),key ecological sources in Huzhou are extracted.Using a combination of resistance surfaces and gravity models,ecological corridors and networks are constructed.The study also provides suggestions for the evaluation and optimization of ecological network patterns.The aim is to summarize generalizable patterns of green space landscape evolution and methods for constructing and optimizing regional ecological corridor networks,offering insights and references for the improvement of the living environment and the construction of ecological civilization.
基金Sponsored by Research Team Project of Anhui Xinhua University(kytd202202)Anhui Provincial Undergraduate Innovation Training Program(S202212216146,S202212216133,S202212216138,AH202112216114)Key Project of Anhui Provincial Higher Education Scientific Research Project(Natural Science)(2022AH051861,2024AH050601).
文摘Urban traffic congestion is a significant challenge that contributes to high-density environments in urban areas,adversely impacting the living conditions of urban residents.The concept of urban renewal introduces new requirements and challenges pertaining to urban transportation issues.To mitigate urban traffic congestion,enhance the greening rate of the city,and improve the urban environment,the concept of developing urban aerial ecological corridors is proposed.An analysis of the current state of various urban aerial corridors in different cities indicates that aerial ecological corridors effectively enhance connectivity and accessibility between different spaces,representing a significant strategy for addressing the issue of urban traffic congestion.Aerial ecological corridors have the potential to enhance the vertical space within urban environments,increase the greening rate of cities,and promote the physical and mental health of urban residents.Additionally,these corridors can improve the connectivity of habitat patches and address the developmental needs of biodiversity.Consequently,they serve as a crucial foundation for guiding the future transformation of urban development towards a healthier and greener direction.
文摘Development of a city depends largely on its transportation, and road construction reveals development skeletons of the city. With the aggravation of city pollution, construction of ecological corridor has been put on the agenda of urban ecological construction, against this background, "2 rings and 17 radial lines" of Zhengzhou City were planned. This paper analyzed the plan from the perspectives of role of urban green corridor, planning principle, characteristic building and greening of building facade, and exploration of green corridors integrating pathways, bikeways, bus harbors and green island gas station.
文摘The practice and research of ecological civilization is a focus of current planning and design,as well as a scientific strategy under the current situation of resource constraint,environmental degradation and ecosystem degradation.Urban elements such as buildings,green land,farmland,water systems and mountains can be connected by ecological corridors into a green ecological system design.At present,many ecological and environmental problems,such as urban heat island effect,fog and haze,automobile exhaust have a negative effect on the construction of social ecological environment.In order to build a new modern city with prosperous economy,beautiful environment and social civilization,scientific and efficient ecological corridors should be designed to improve the environmental quality of the eco-city,and promote the construction and development of ecological civilization and green cities.Based on the relevant research and specific practices of ecological corridors at home and abroad,combine the needs of the planning and construction of the Yuzhong Ecological Innovation City,and discuss on the connotation and characteristics of ecological corridors,and discuss the key elements of ecological corridor planning.This article will take the ecological corridor planning of Yuzhong Eco-Innovation City as an example.We design ecological corridor based on field investigation,literature and geographic information system..The planning and design of the ecological corridor in the planning area proposed in this paper can provide positive suggestion on the planning and design of the ecological corridor in other ecological innovation cities.
基金supported by the Natural Science Foundation of Fujian Province(2023J01434)the Science and Technology Innovation Special Fund Project of Fujian Agriculture and Forestry University(KFb22028XA)。
文摘Addressing the widespread issues of internal fragmentation within protected areas and the neglect of surrounding critical habitat networks,this study aims to develop an assessment framework for the precise identification and remediation of regional conservation gaps.To this end,we introduce the Framework for Conservation Priority Identification(FCPI).The framework integrates Morphological Spatial Pattern Analysis(MSPA),the Remote Sensing Ecological Index(RSEI),Circuit Theory,and the Minimum Cumulative Resistance(MCR)model to formulate a multidimensional conservation priority index.This index facilitates the identification of critical ecological network components and enables the dynamic prioritization of conservation efforts.A case study of Fuzhou City from 2014 to 2020 reveals that despite an overall improvement in regional environmental quality,the functionality of core ecological sources has markedly declined.Between 2014 and 2020,the number of ecological sources grew by 76.9%,yet their total area shrank by 13.9%.Concurrently,the number of ecological corridors rose from 27 to 53,extending their total length by 380.23 km,which indicates an intensifying trend of habitat fragmentation.Furthermore,a significant number of crucial ecological network nodes,particularly within Minhou County,lie explicitly outside the existing protected area system.This confirms the presence of conservation gaps and unveils the spatiotemporal dynamics of shifting conservation priorities.The research validates that the proposed FCPI can effectively diagnose the dynamic deficiencies within conservation systems.It offers scientific decisionsupport for local governments,facilitating a transition from isolated conservation efforts towards systematic and comprehensive ecological network governance.
基金We thank the authors and the coordinators of surveys and monitoring programs for permission to use the data for this study,including D.G.Pikunov,V.V.Aramilev,M.N.Litvinov and others.Thanks to Y.Darman for background information on earlier conservation planning in this region.Support was provided by the Wildlife Conservation Society,the Liz Claiborne and Art Ortenburg Foundation,and the Pacific Institute of Geography.In addition,this study is part of the Program of the Amur Tiger Research in the Russian Far East,which is conducted by the Permanent Expedition of the Russian Academy of Sciences for study of Russian Red Data Book animals and other key animals of Russian fauna,and was supported by the Russian Geographical Society and a Grant from the President of the Russia Federation(No MK-4313.2014.4).
文摘The rapid explosion of human populations and the associated development of human-dominated landscapes have drastically reduced and fragmented habitat for tigers(Panthera tigris)and leopards(Panthera pardus)across Asia,resulting in multiple small populations.However,Amur tiger(Panthera tigris altaica)habitat in Russia has remained largely interconnected,except for a break between tigers in southwest Primorye and the southern Sikhote-Alin Mountains.This habitat patch in southwest Primorye also retains the last population of Amur leopards(Panthera pardus orientalis).Genetic differentiation of tigers in southwest Primorye and the Sikhote-Alin Mountains along with survey data suggest that habitat fragmentation is limiting movement of tigers and leopards across the Razdolnaya River basin.We looked at historical and recent survey data on tigers and leopards and mapped existing cover types to examine land-use patterns of both large felids and humans in the development strip along the Razdolnaya River.We then used least-cost distance analyses to identify the most effective potential corridor to retain connectivity for large felids between Land of the Leopard National Park and Ussuriskii Zapovednik(Reserve).We identified a single potential corridor that still exists with a total distance of 62.5 km from Land of the Leopard National Park to Ussuriskii Zapovednik,mostly(93%)through forested habitat.We recommend formal recognition of a Razdolnaya ecological corridor and provide specific recommendations for each of 3 proposed management sections.
基金supported by Hunan Provincial Natural Science Foundation General Project,grant number 2023JJ306932023 Central South University Education and Teaching Reform Research Project,grant number 2023jy045-3Hunan Provincial Key Laboratory of Low Carbon Healthy Building
文摘The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics at different spatial scales,making it difficult to effectively tackle environmental issues.This study focuses on the Changsha–Zhuzhou–Xiangtan urban agglomeration(CZXUA)to construct an ESP from 2 scales:the urban agglomeration and the metropolitan area.First,ecological sources at different scales were identified and optimized using morphological spatial pattern analysis,ecosystem service supply assessment,landscape connectivity evaluation,and ecological demand intensity analysis.Next,spatial principal component analysis was employed to analyze resistance factors across different spatial scales,enabling the construction of a multi-scale landscape resistance surface.Finally,multi-scale ecological corridors were extracted using circuit theory,and the ecological corridors passing through the central urban area were optimized.As a result,176 ecological sources,337 ecological corridors,60 ecological pinch points,and 30 ecological barrier points were identified,forming the overall ESP for the CZXUA.Furthermore,an ecological protection and optimization pattern,described as“One River,Seven Waters,One Heart,and Eight Wedges”,was proposed based on the ESP.This pattern highlights pivotal areas for ecological protection and restoration within the national land space.This study provides a comprehensive example of constructing a multi-scale ecological corridor network and identifying critical areas for ecological protection and restoration.The findings can serve as a reference for special ecological protection planning in urban agglomerations.
基金The authors wish to thank International Fund for Animal Welfare(IFAW)and Xishuangbanna National Nature Reserve for financial and logistic support,Feng Liming,Ma Lichao,Yuan Zhiqiang,Zhu Wenqing,Guo Yanli,Wang Lihong,Yang Fan,Liu Yuyi and Zhang Na for guidance and advice.Zhao Huaidong for field assistance.
文摘This paper is based on the fieldwork in Xishuang-banna Natioanl Nature Reserve in Yunnan Province of China.GPS data of Asian elephants were collected and analyzed with the remote sensing satellite photos of the region to estimate the landform physiognomy of different colors.We also analyzed a series of ecological factors includ-ing altitude,landform,relief,villages and roads which affected the distribution and movement of Asian elephants.The results suggested the possibility of designing and estab-lishing corridors in Xishuangbanna National Nature Reserve to protect the population of wild elephants in the region.
基金funded by the Xinjiang Uygur Autonomous Region Tianshan Talent Training Program(2023TSYCLJ0047)the Natural Science Foundation of Xinjiang Uygur Autonomous Region(2023D01D18)+1 种基金the Key Research and Development Project of Xinjiang(2022B03024-1)the Science and Technology Planning Project of Xinjiang Production and Construction Corps(2022DB023)。
文摘Scientifically constructing an ecological security pattern(ESP)is an important spatial analysis approach to improve ecological functions in arid areas and achieve sustainable development.However,previous research methods ignored the complex trade-offs between ecosystem services in the process of constructing ESP.Taking the mainstream of the Tarim River Basin(MTRB),China as the study area,this study set seven risk scenarios by applying Ordered Weighted Averaging(OWA)model to trade-off the importance of the four ecosystem services adopted by this study(water conservation,carbon storage,habitat quality,and biodiversity conservation),thereby identifying priority protection areas for ecosystem services.And then,this study identified ecological sources by integrating ecosystem service importance with eco-environmental sensitivity.Using circuit theory,the ecological corridors and nodes were extracted to construct the ESP.The results revealed significant spatial heterogeneity in the four ecosystem services across the study area,primarily driven by hydrological gradients and human activity intensity.The ESP of the MTRB included 34 ecological sources with a total area of 1471.38 km^(2),66 ecological corridors with a length of about 1597.45 km,11 ecological pinch points,and 13 ecological barrier points distributed on the ecological corridors.The spatial differentiation of the ESP was obvious,with the upper and middle reaches of the MTRB having a large number of ecological sources and exhibiting higher clustering of ecological corridors compared with the lower reaches.The upper and middle reaches require ecological protection to sustain the existing ecosystem,while the lower reaches need to carry out ecological restoration measures including desertification control.Overall,this study makes up for the shortcomings of constructing ESP simply by spatial superposition of ecosystem service functions and can effectively improve the robustness and stability of ESP construction.
基金supported by the Science Fund for the Gansu Provincial Natural Science Foundation Project(22JR5RA339).
文摘Land use/cover change(LUCC)constitutes the spatial and temporal patterns of ecological security,and the construction of ecological networks is an effective way to ensure ecological security.Exploring the spatial and temporal change characteristics of ecological network and analyzing the integrated relationship between LUCC and ecological security are crucial for ensuring regional ecological security.Gansu is one of the provinces with fragile ecological environment in China,and rapid changes in land use patterns in recent decades have threatened ecological security.Therefore,taking Gansu Province as the study area,this study simulated its land use pattern in 2050 using patch-generating land use simulation(PLUS)model based on the LUCC trend from 2000 to 2020 and integrated the LUCC into morphological spatial pattern analysis(MSPA)to identify ecological sources and extract the ecological corridors to construct ecological network using circuit theory.The results revealed that,according to the prediction results in 2050,the areas of cultivated land,forest land,grassland,water body,construction land,and unused land would be 63,447.52,39,510.80,148,115.18,4605.21,8368.89,and 161,752.40 km^(2),respectively.The number of ecological sources in Gansu Province would increase to 80,with a total area of 99,927.18 km^(2).The number of ecological corridors would increase to 191,with an estimated total length of 6120.66 km.Both ecological sources and ecological corridors showed a sparse distribution in the northwest and dense distribution in the southeast of the province at the spatial scale.The number of ecological pinch points would reach 312 and the total area would expect to increase to 842.84 km^(2),with the most pronounced increase in the Longdong region.Compared with 2020,the number and area of ecological barriers in 2050 would decrease significantly by 63 and 370.71 km^(2),respectively.In general,based on the prediction results,the connectivity of ecological network of Gansu Province would increase in 2050.To achieve the predicted ecological network in 2050,emphasis should be placed on the protection of cultivated land and ecological land,the establishment of ecological sources in desert areas,the reinforcement of the protection for existing ecological sources,and the construction of ecological corridors to enhance the stability of ecological network.This study provides valuable theoretical support and references for the future construction of ecological networks and regional land resource management decision-making.
基金funded by the National Natural Science Foundation of China(41807519)the Open Fund Project of Key Laboratory of Deserts and Desertification,Chinese Academy of Sciences(KLDD-2018-002).
文摘Ecological security patterns are paramount to the advancement of an ecological civilization in China,aiming to enhance the stability and service functions of ecosystems to achieve sustainable regional development.However,current regional ecological protection efforts have not been effectively integrated into the regional development planning of ecological security pattern.This study systematically assessed the effectiveness of ecological protection projects in Yanchi County,Ningxia Hui Autonomous Region,China,through the evaluation of landscape ecological quality.Based on the evaluation results of landscape ecological quality,this study used morphological pattern analysis(MSPA),minimum cumulative resistance(MCR)model,and gravity model together to construct the ecological security pattern of Yanchi County.The findings revealed that from 1990 to 2020,with the implementation of ecological protection projects started from 2000,the landscape stability of Yanchi County first decreased and then increased,and the intensity of landscape disturbance first intensified but then decreased,indicating an improvement in the landscape ecological quality and a significant enhancement of the ecological environment in Yanchi County.The ecological security pattern of Yanchi County consisted of 10 ecological sources,10 ecological source points,23 ecological corridors,and 27 ecological nodes.The ecological security pattern of Yanchi County exhibited distinct spatial variations,with stronger ecological security observed in the southern part than in northern part of the county.The ecological sources were denser in the southern part than in the northern part of the county,and accordingly,the length of ecological corridors was shorter and denser in the southern than that in the northern part of the county.Based on the spatial distribution of landscape ecological quality and the characteristics of ecological security pattern of Yanchi County in 2020,we suggested Yanchi County to build four zones to optimize the ecological security pattern construction:the Haba Lake ecological conservation zone,the urban ecological planning zone,the ecological environment restoration zone,and the ecological security improvement zone.This study can provide essential guidance for the construction of ecological security pattern in farming-pastoral areas both in China and worldwide.
文摘Monsoons frequently sweep over the blue waves of the South China Sea,and mangrove respiration empowers the heartbeats of the two marine civilizations of China and Indonesia.In 1950,the seeds of China-Indonesia friendship sprouted in the monsoons on the Strait of Malacca.Today,echoing the Belt and Road Initiative,the ecological green corridor jointly built by the two countries is weaving a vibrant tapestry of life along the equator.On the occasion of the 75th anniversary of the establishment of diplomatic relations between China and Indonesia,the“Revitalization of Mangroves”China-Indonesia Dialogue on Sustainable Development took place in Jakarta,Indonesia,on May 19.The event was co-hosted by China International Communications Group(CICG),China Energy Investment Corporation(CHN Energy),and Indonesia’s State Electricity Company(PT PLN).
基金National Natural Science Foundation of China Youth Fund Project:Research on the Construction of Ecological Security Pattern in the Transition Zone of Nature Reserves along the Sichuan-Xizang Railway(Western Sichuan Section)(51908470).
文摘Lhasa,one of the world's highest cities,confronts the challenge of harmonizing cultural heritage preservation with ecological protection.Assessing the spatiotemporal dynamics of ecosystem service value(ESV)in its central urban area is therefore critical for informing future urban planning and land management.This study systematically analyzed land use evolution,the spatiotemporal characteristics of ecosystem services,and ecological network construction within Lhasa's central urban area.It integrated multi-source data,including Landsat remote sensing imagery from 2000,2010,and 2023,with multiple modeling methods such as the InVEST model,MaxEnt for cultural service assessment,the Minimum Cumulative Resistance(MCR)model,and circuit theory.Based on these analyses,optimization strategies were proposed.The results indicate that from 2000 to 2023,areas of cultivated land,grassland,and water bodies decreased by 7.47%,6.85%,and 0.68%,respectively,while wetland and forest areas expanded by 1.44%and 0.64%.Construction land exhibited significant expansion(12.94%),leading to an overall ESV reduction of 462.8×10^(5)yuan.Vegetation coverage was identified as the pivotal factor influencing ESV distribution,with higher values concentrated in the Lhasa River Basin and near the Lhalu Wetland,diminishing towards the urban core.Furthermore,spatial autocorrelation analysis revealed significant positive spatial clustering,with low-low aggregation in the eastern and central regions and high-high aggregation in the Lhasa River Basin and its surrounding water bodies.Moreover,based on a comprehensive ecosystem service assessment,11 ecological source sites were identified,primarily in the southwestern mountains and northeastern foothills.A comprehensive resistance surface,incorporating factors such as elevation,Normalized Difference Vegetation Index(NDVI),and land use,facilitated the extraction of 23 potential ecological corridors totaling 124.96 km in length.Topological network analysis indicated high redundancy and connectivity;however,marginal source sites relying on single connections exhibited significant vulnerability to rupture.Additionally,the application of circuit theory identified 30 ecological pinch points(current density≥1.5 A/km^(2))and 23 obstacle points,revealing significant blockages to ecological flow along the Qinghai-Xizang Highway,within the old city,and in other areas of high-intensity human activity.To address the identified network deficiencies—‘scattered cores,fragmented corridors,and insufficient resilience’—this study proposes an optimization strategy conceptualized as‘one vein,three corridors,and multiple cores’.Recommendations for enhancing network resilience include the delineation of ecological protection red lines,the integration of plateau-adapted technologies,and the fostering of community governance mechanisms.This approach aims to provide a scientific basis for constructing an ecological security pattern and promoting sustainable development in plateau cities.Ultimately,this research contributes to the enhancement of ecological well-being in the Himalayan region.
基金funded by the Improvement Plan of Scientific Research Ability in Northwest Normal University(NWNU-LKQN2020-16)National Science Foundation of China(Grant No.41771130)。
文摘The construction of an ecological security pattern(ESP)is an important way to ensure regional ecological security and to achieve sustainable regional development.It is also one of the hotspot topics of landscape ecology research.This paper identifies the ecological source through the evaluation of the ecosystem service and ecosystem sensitivity of the Lanzhou-Xining(Lan-Xi)urban agglomeration.The minimum cumulative resistance(MCR)model modified by night light data NPP/VIIRS(National Polar-orbiting Operational Environmental Satellite System Preparatory Project/Visible Infrared Imaging Radiometer Suite)was used to measure the relative resistance of the materials and energy circulation between the source areas,and to establish the resistance surface of the ecological source area expansion.Then ecological corridors were identified based on ecological sources and resistance surface.The ecological strategic node is the ecological fragile point in the ecological corridors.The ecological strategic node is identified with hydrological module by superimposing the"ridge line"of cumulative ecological resistance with the ecological corridor.Combined with ecological sources,corridors and strategic nodes,the ESP of the Lan-Xi urban agglomeration can be constructed.The ecological source of the Lan-Xi urban agglomeration accounts for 28.42%of the total area,most of which is distributed within Qinghai Province.The nature reserves in the area are all located within the ecological source area.A total of 41 potential ecological corridors have been identified in the study area.The total length of the potential corridors is 1201.03 km,comprising 23 source corridors and 18 radiation corridors.There are 30 strategic nodes identified in the Lan-Xi urban agglomeration.These locations are the most vulnerable areas of the ecological corridors.Ecological engineering should be applied in the construction of corridors.Affected by the ecological source,the potential ecological corridor extends from the northwest to the southeast,which is basically consistent with the direction trend of the mountains in the region.
基金supported by the National Natural Science Foundation of China(Grant No.41901027)the Natural Science Foundation of Guangdong Province,China(Grant No.2021A1515012208)the China Postdoctoral Science Foundation(Grant Nos.2021T140222 and 2018M643110).
文摘Background:With the increasing fragmentation of landscape induced by rapid urbanization,the construction of ecological networks is of great signifcance to alleviate the degradation of urban habitats and protect natural envi‑ronments.However,there is considerable uncertainty when constructing ecological networks,especially the difer‑ent approaches to selecting ecological sources.We used the southern Chinese city of Shenzhen as a study area to construct and optimize ecological networks using a coupling approach.Ecological source areas were extracted using morphological spatial pattern analysis(MSPA)and the landscape index method.Ecological networks were con‑structed using the minimal cumulative resistance(MCR)model and the gravity model.Stepping stones and ecological fault points were added in corridors to optimize the ecological network.Results:Ten core areas with maximum importance patch values were extracted by the landscape index method as ecological source areas according to MSPA,after which corridors between ecological sources were constructed based on the MCR model.The constructed ecological networks were optimized using 35 stepping stones and 17 ecologi‑cal fault points.The optimized ecological networks included 11 important corridors,34 general corridors,and seven potential corridors.The results of corridor landscape-type analysis showed that a suitable ecological corridor is 60 to 200 m wide.Conclusions:Overall,our results imply that ecological source areas can be identifed virtually,and that ecological networks can be signifcantly optimized by combining MSPA and MCR models.These results provide a methodologi‑cal reference for constructing ecological networks,and they will be useful for urban planning and biodiversity protec‑tion in Shenzhen and other similar regions around the world.
基金funded by the National Key Research and Development Program of China(2018YFD1100203)the second batch of open funds from Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology(SJXTQ1616)+1 种基金the Natural Science Foundation of Education Department of Anhui Province(KJ2020A0078)the Scientific Research Foundation for the Introducing of Talent of Anhui Science and Technology University(ZRC2014466)。
文摘The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and spatial planning,this study established a spatial structural pattern of"ecological source-ecological corridor-ecological node"along with methods including landscape connectivity analysis and ecological resistance surface analysis.Taking the ecological space of Xuzhou City,a typical resource-based city,as a case study,this research analyzed the ecological spatial network structure and evaluated the evolution characteristics before judging the breadth threshold value of the ecological corridor and providing planning control strategy.The study found that since the urbanization of Xuzhou City resumed its growth,the quantity of ecological sources,corridors,and nodes have grown along.The resistance of the ecological corridor increases year by year,with the proper breadth threshold value around 100–200 m.The development of an ecological network structure shows a single-polarization evolution characteristic that is high quality and high resistance.
基金The authors acknowledge financial support from the National Social Science Foundation of China(No.18BJY086)the National Natural Science Foundation of China(No.41871192),。
文摘Taking the lower Yellow River basin as the study area,this study aims to construct ecological networks to mitigate the negative impacts of rapid urbanization on the ecosystem.Ecological sources were identified based on morphological spatial pattern analysis(MSPA),habitat quality and landscape connectivity.The ecological resistance surface was constructed and corrected by integrating natural and anthropogenic factors.The spatial range of ecological corridors and some of their key nodes were identified based on circuit theory.The ecological network(EN)was finally optimized using a similarity search and cost connectivity modules.The results show that the optimized ecological network structure is more stable than before.The EN includes 23 ecological sources with a total area of 5464.8 km^(2)and 30 ecological corridor clusters with a total area of 2205.92 km^(2).Through the internal landscape heterogeneity of the corridor,28 ecological node areas and 75 barrier areas were identified as key protection and restoration areas,with a total area of 78.44 km^(2)and 372.79 km^(2),respectively.Through the construction and optimization of EN,this study identifies key areas for promoting ecological sustainability and provides a useful framework for coordinating regional ecological conservation and economic development.
基金supported by the Sichuan Science and Technology Program,China(Grant No.2023YFS0372).
文摘Forest thinning and ground cover plant management play crucial roles in habitat enhancement,yet their effects on soil microbiota remain poorly understood.This study examines their impact on soil properties and bacterial communities in artifcial spruce forests(Picea asperata)within China’s Huangtuliang ecological corridor,a crucial habitat for giant pandas.Thinning signifcantly alters soil pH and total phosphorus(TP)levels,with minimal changes observed in total nitrogen(TN),microbial biomass carbon(MBC)and nitrogen(MBN).The combined effect of thinning and ground cover presence increases soil organic carbon(SOC)to 65.47 g/kg,contrasting with its absence.Thinning enhances the abundance of Proteobacteria,Acidobacteria and Chlorofexi while reducing Actinobacteria.Conversely,ground cover removal decreases Proteobacteria and Bacteroidetes but increases Chlorofexi,Verrucomicrobia and Rokubacteria.These changes lead to reduced bacterial community diversity,as indicated by a lower Shannon diversity index and distinct community composition differences demonstrated through beta-diversity analysis.Soil pH,TP and MBN are crucial in maintaining bacterial community structure,with pH and TP exhibiting the strongest correlations.Network analysis confrms the signifcant infuence of TP and pH on bacterial genera across various phyla.This study reveals the role of stochastic processes in highelevation,low-temperature ecological corridors(R^(2)=0.817),with thinning’s impact varying depending on the ground cover presence,thus enhancing effects post-removal by reducing dispersal limitation(migration rate,m=0.96).These fndings highlight the ecological implications of habitat management in sensitive ecosystems and advance our understanding of microbial dynamics in critical habitats.
