The impacts of anthropogenisation modify permanently the distribution patterns of brackish and marine species. Globalization leads to a rapid increase of the numbers of introduced species anywhere in the world. Biolog...The impacts of anthropogenisation modify permanently the distribution patterns of brackish and marine species. Globalization leads to a rapid increase of the numbers of introduced species anywhere in the world. Biological invasions often result in significant losses in the economic value, biological diversity and function of invaded ecosystems. This review presents the main pathways of introduction of non-indigenous species and the main benthic taxonomic groups being established and/or invasive along the French Channel-Atlantic coasts. A focus is put on main invasive marine species in the intertidal and subtidal zones of Brittany (France), among macroalgae (Sargassum muticum, Grateloupia turuturu, Undaria pinnatifida, Codium fragile and Gracilaria vermiculophylla), halophytes (Spartina alterniflora) and benthic invertebrates (Mollusks: Crepidula fornicata, Crassostrea gigas and Venerupis philippinarum). The species biology, introduction vectors, reproductive and dispersal capacities are considered, together with proliferation patterns along the Channel-Atlantic coasts. The ecological impacts of these species on the environment are also described, as well as the European regulations existing to limit alien species introduction and some examples of struggle against the invaders including eradication trials and biomass valorization. Last, the on-going impacts of global changes on alien species invasiveness along the Channel-Atlantic coasts are discussed.展开更多
Ecosystem services(ESs)refer to the continuous provisioning of ecosystem goods and services that benefit human beings.Over recent decades,rapid urbanization has exerted significant pressure on coastal ecosystems,resul...Ecosystem services(ESs)refer to the continuous provisioning of ecosystem goods and services that benefit human beings.Over recent decades,rapid urbanization has exerted significant pressure on coastal ecosystems,resulting in biodiversity and habitat loss,environmental pollution,and the depletion of natural resources.In response to these environmental challenges,the Sustainable Development Goals(SDGs)were proposed.Given the pressing need to address these issues,understanding the changes in ESs under the SDGs is crucial for formulating specific ecological strategies.In this study,we first analyzed land use and cover change in the Zhejiang coasts of China during 2000–2020.Then,we investigated the spatiotemporal configuration of ESs by integrating carbon storage(CS),soil retention(SR),habitat quality(HQ)and water yield(WY)using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model.The driving mechanisms of ESs,which varied by space and time,were also explored using the Geo-detector method.The results revealed that,over the past two decades:1)the Zhejiang coasts have experienced a significant increase of 2783.72 km^(2) in built-up land areas and a continuous decrease in farmland areas due to rapid urbanization;2)owing to higher precipitation,extensive vegetation cover,and reduced anthropogenic disturbances,forests emerge as a crucial land use type for maintaining ecosystem services such as HQ,CS,WY,and SR;3)ESs have generally declined across the entire Zhejiang coasts,with a significant decrease observed in the northern areas and an increase in the southern areas spatially;4)the expansion of built-up land areas emerged as the primary factor affecting ecosystem services,while the vegetation factor has been increasingly significant and is expected to become predominant in the near future.Our study provides insights of understanding of ecosystem service theory and emphasizing the importance of preserving biodiversity for long-term sustainable development,and valuable scientific references to support the ecological management decision-making for local governments.展开更多
The classification and identification for Protoperidinium species are the most difficult work during its taxonomic study. In this research, taxonomic status of Protoperidinium was clarified by tracing its taxonomic hi...The classification and identification for Protoperidinium species are the most difficult work during its taxonomic study. In this research, taxonomic status of Protoperidinium was clarified by tracing its taxonomic history, 23 species belong to genus Protoperidinium on the coasts of China were preliminarily identified, and morphological description and plate patterns were given for each species. The key differences of similar species were also discussed in this study, we believe that P. oceanicum and P. murry, P. tumidum and P. fatulipes, P. globules and P.majus are separate species; P. diabolum should be treated as the valid name instead of the reported names Peridinium globosum or Peridinium longipes; the taxonomic relationship between P. punctulatum and P.subinerme requires further study.展开更多
Introduction The International Conference on Asian and Pacific Coasts(APAC)is an international conference to promote academic and technical exchange on coastal related studies that include coastal engineering and coas...Introduction The International Conference on Asian and Pacific Coasts(APAC)is an international conference to promote academic and technical exchange on coastal related studies that include coastal engineering and coastal environmental problems,among the Asian and Pacific countries/regions.APAC展开更多
The traditional idea proposes that granites on the east and west coasts of the Pacific Ocean are different. According to field investigations of the geology of the western United States coupled with the authors' l...The traditional idea proposes that granites on the east and west coasts of the Pacific Ocean are different. According to field investigations of the geology of the western United States coupled with the authors' long-term studies on granites in South China, granites both in eastern China and in the western United States are similar.展开更多
An improved procedure for extracting the radiational S2 tide from analyzed S2 is presented in this paper. The major improvement is that the nonlinear constituents are eliminated from the analyzed principal semidiurnal...An improved procedure for extracting the radiational S2 tide from analyzed S2 is presented in this paper. The major improvement is that the nonlinear constituents are eliminated from the analyzed principal semidiurnal tides on the basis of the 'credo of smoothness' of admittance before using the procedure given by Zetler. The semidiurnal radiationai S2 tides for 42 stations along China's coasts are calculated using the method presented in this paper, and, for comparison, the results from Zetler's method are also given. In addition, the radiational S2 tides for 10 stations are analyzed with the response method. The results show that the mean amplitude ratio (radiational to gravitational) is 0. 17, the mean phase difference (radiational minus gravitational) is 119° for China's coasts.展开更多
The 7th International Conference on Asian and Pacific Coasts （APAC2013） will be held in Bali, Indonesia in September 2013. The aim of the conference is to promote scientific advancement, technological progress, info...The 7th International Conference on Asian and Pacific Coasts （APAC2013） will be held in Bali, Indonesia in September 2013. The aim of the conference is to promote scientific advancement, technological progress, information exchange, and cooperation among engineers and researchers in coastal, port, and ocean engineering and other related fields展开更多
Summary Report The 6^th International Conference on Asian and Pacific Coasts, organised by the Department of Civil Engineering and the Department of Mechanical Engineering, The University of Hong Kong, was held in the...Summary Report The 6^th International Conference on Asian and Pacific Coasts, organised by the Department of Civil Engineering and the Department of Mechanical Engineering, The University of Hong Kong, was held in the Sheraton HK Hotels ＆ Towers, Hong Kong during December 14-16, 2011.展开更多
The Holocene aeolian shell-clastic sandstones at 13 places along the coasts of Fujian, Guangdong and Hainan Provinces are studied in the following respects; describing their features from both macroscopic and microsco...The Holocene aeolian shell-clastic sandstones at 13 places along the coasts of Fujian, Guangdong and Hainan Provinces are studied in the following respects; describing their features from both macroscopic and microscopic views, listing their distributions, altitudes and forming ages, and discussing the nomenclatures of this kind of rock and its differences from beach rock.展开更多
In order to evaluate the contamination of the Moroccan Mediterranean coasts by persistent organic pollutants we studied hydrocarbons and linear alkylbenzenes in bivalve tissues (cockles) collected seasonally from seve...In order to evaluate the contamination of the Moroccan Mediterranean coasts by persistent organic pollutants we studied hydrocarbons and linear alkylbenzenes in bivalve tissues (cockles) collected seasonally from several points along the western Moroccan coasts in the Mediterranean Sea. Two fractions corresponding to non aromatic and aromatic hydrocarbons were analyzed by GC/FID and GC/MS. Non aromatic hydrocarbon concentrations vary in the range of 24.1 - 2731 μg/g dry weight (dw) while total n-alkanes vary from 2.2 to 68.2 μg/g. Few exceptions were noted with values up to 243 μg/g (dw), which is high compared to other Mediterranean sites. The presence of an important unresolved complex mixture (UCM) indicated a significant petroleum contamination, confirmed by the identification of 17α(H), 21β(H) hopanes. Biogenic contributions were also detected within the n-alkane distribution (n-C17, n-C18, n-C27, n-C29, n-C17, /Pr, n-C18, /Ph) and by the presence of alkenes. C13, and C14, linear alkylbenzenes were found at concentrations of 478 - 1954 ng/g. and point to pollutant inputs from wastewaters. Polycyclic aromatic hydrocarbons were present in low concentrations below the GC detection limit. The observed seasonal and spatial variations were linked to the magnitude of inputs from marine and land-based pollutant discharges.展开更多
The feeding habits of 500 specimens of Pagrus pagrus （family： Sparidae）, inhabiting Benghazi Mediterranean Coast, were studied monthly from January to December 2008. The annual diet composition, monthly variations ...The feeding habits of 500 specimens of Pagrus pagrus （family： Sparidae）, inhabiting Benghazi Mediterranean Coast, were studied monthly from January to December 2008. The annual diet composition, monthly variations in the diet composition, the variations of diet with length and the intensity of feeding were studied. Pagruspagrus feed on a wide variety of prey types： crustaceans （38.3%）, molluscs （13.2 %）, echinoderms （11.4%）, polychaetes （10.7%）, digestive food （10.3%）, fish parts （7.1%）, seagrasses （6.4%） and sediments （2.7%）. The crustacean was the major food item all year round and it was found in all length groups. In the present study crustaceans, polycheates, seagrasses and sediments decreased as the size increased while molluscs, echinoderms, digestive food and fish parts increased as the fish size increased. The feeding intensity was quite high during the summer and early autumn.展开更多
The sedimentary strata and deposition ages of the 'old red sand' distributed along the coasts of south Fujian and west Guangdong are determined by lithostratigraphy, magnetic stratigraphy and earth chemistry c...The sedimentary strata and deposition ages of the 'old red sand' distributed along the coasts of south Fujian and west Guangdong are determined by lithostratigraphy, magnetic stratigraphy and earth chemistry combined with TL, ESR and 14C-dating techniques. The research shows that the 'old red sand' was aeolian sediments deposited from 55 400 to 9 000 aBP, the last glacial period in the middle and later age of Late Pleistocene. Most of them deposited in two periods of 56-42 ka and 30-10 ka. The 'old red sand' deposited in the period of 30-10 ka, the later Wurm glacier substage (Q33), developed on the largest scale with the widest distribution.展开更多
In this study,acetone extracts of thirteen different species distributed in Turkey Coasts including tunicates,sea anemones,sponges and corals were investigated for their superoxide(SO)radical scavenging and cytotoxic ...In this study,acetone extracts of thirteen different species distributed in Turkey Coasts including tunicates,sea anemones,sponges and corals were investigated for their superoxide(SO)radical scavenging and cytotoxic activities.VWhile SO radical scavenging activity was tested using alkaline DMSO method,cytotoxic activity was tested by MTT assay against Hep-2 cancer cell line.As a result of bioactivity studies,Paramuricea clavata extract showed展开更多
The phytoplankton group’s composition is an excellent indicator of the state of coastal waters. The aim of this study is to explore spatial variability of phytoplankton in shallow coastal areas from different regions...The phytoplankton group’s composition is an excellent indicator of the state of coastal waters. The aim of this study is to explore spatial variability of phytoplankton in shallow coastal areas from different regions(East, Center and West) of the Algerian coast. The quantitative and qualitative study of the phytoplankton population was conducted on samples taken during the 2012–2013 period by the research vessel GRINE BELKACEM. The qualitative results show a significant diversity of diatoms and dinoflagellates, which rank first and second in the total flora(Fr > 50%). This finding is also confirmed quantitatively by the abundance values in both 2013 and 2012 samples which largely exceeds the average value in most other areas of the western region(56%) and slightly exceeding 52% in all central areas which represent an equi-distribution between diatoms and dinoflagellates. The Dinoflagellates contribute significantly to the quantitative richness in the eastern region(>60%). The minimum value of Dia/Dino index, recorded in the eastern region confirms the dominance of the dinoflagellates especially in Skikda(0.31)(Skikda).However, our results reveal the presence, in smaller proportion, of other groups such as the cocolithophoridae and euglenophyceae.展开更多
Objective:To determine the concentrations of Fe,Zn,Ni,Cu,Mn,Pb,Cd and Co in macroalgae from Sinop coasts of the Sounthern Black Sea.Methods:Chlorophyta-green algae(Chaetomorpha spp.,Cladophora spp.,Ulva linza,Ulva int...Objective:To determine the concentrations of Fe,Zn,Ni,Cu,Mn,Pb,Cd and Co in macroalgae from Sinop coasts of the Sounthern Black Sea.Methods:Chlorophyta-green algae(Chaetomorpha spp.,Cladophora spp.,Ulva linza,Ulva intestinalis,Ulva lactuca,Ulva rigida);Ochrophyta-brown alga[Cystoseira barbata(C.barbata)]and Rhodophyta-red algae(Ceramium spp.,Corallina panizzoi)were collected seasonally in the year 2010 from the upper infralittoral zone of inner harbour,outer harbour,Gerze and Ayancık of Sinop coasts of the Black Sea.The samples were analysed by atomic absorption spectrophotometer in order to determine heavy metal levels in different algal division species along Sinop coasts and to provide information of marine environment quality as marine strategy framework directive is aimed to ensure good environmental status of the seas by 2020 in the European Union.Results:The results showed that metal concentrations in all studied green algae,brown alga and red algae increase in the order:Cd<Co<Ni<Pb<Cu<Zn<Mn<Fe,Cd<Co<Cu<Ni<Pb<Mn<Zn<Fe and Co<Cd<Ni<Cu<Pb<Mn<Zn<Fe,respectively.In all divisions,among the essential elements the highest concentrations exhibited by Fe,in Gerze station-(2328±89)μg/g dry weight in Chaetomorpha spp.;(2143±78)μg/g dry weight in C.barbata and(968±20)μg/g dry weight in Ceramium spp.Conclusions:The highest accumulation of different metals in the analysed algae species were:Fe and Co in Chaetomorpha spp.,Zn in C.barbata,Ni and Cu in Ulva linza,Mn in Ulva intestinalis,Pb and Cd in Corallina panizzoi.展开更多
There is now an abundance of evidence of the importance of coastal systems as the land-sea interface,creating spe-cific habitats and ecosystems and as a favoured location for human settlement,taking advantage of the m...There is now an abundance of evidence of the importance of coastal systems as the land-sea interface,creating spe-cific habitats and ecosystems and as a favoured location for human settlement,taking advantage of the many sys-tem services available(ecological,land/seascape,access,etc.).This has created complex socio-eco-geomorpho-logical interactions and a high demand to adapt human activity to improve the inherent resilience of the collec-tive system,especially in-the-face of the challenges that arise from climate change.As we pointed out in our Edi-torial to launch Anthropocene Coasts(Gao and Townend,2018),human activities dominate over many of the natu-ral processes that used to exclusively shape our coastal regions.Coastal development and especially major infra-structure,create fixed points on the coast,urban areas discharge large volumes of waste into the sea,coastal eco-systems are squeezed out of existence,or have to com-pete with invasive species,and coastal communities are facing hazards of increasing severity.展开更多
Find It What do boat captai ns try to do?W hale and dolphin watching is a popular thing to do off the coast of Hualien.*It is an amazing adventure!Imagine this:You are on a boat.Then a big whale jumps out of the water.
This study analyzed data from zooplankton surveys conducted in the coastal waters of Rizhao during the summers of2020–2023 to deterine trends in the number of taxa,dominant taxa,biomass,abundance,and biodiversity ove...This study analyzed data from zooplankton surveys conducted in the coastal waters of Rizhao during the summers of2020–2023 to deterine trends in the number of taxa,dominant taxa,biomass,abundance,and biodiversity over the 4 years.The results indicated the presence of 41 zooplankton species belonging to Hydromedusa,Ctenophora,Copepoda,Cladocera,Amphipoda,Decapoda,Tunicata,Chaetognatha,Chordata,along with 19 types of planktonic larvae.The total number of taxa showed little change over the 4 years.A total of 10 dominant species and 8 dominant larval types were identified in the surveyed waters,and the dominant species vary from year to year.In terms of community structure,planktonic larvae,hydromedusae,and copepods were the dominant taxa.The proportion of planktonic larvae showed an upward trend,while that of hydromedusae exhibited a downward trend.The zooplankton collected by the shallow water type I(SWI)net and shallow water type II(SWII)net in the survey area could each be divided into 2 communities.Correlation analysis revealed that the abundance of zooplankton collected by the(SWI)net was significantly negatively correlated with water temperature(P<0.05),while the Shannon-Wiener index(H')was significantly positively correlated with water temperature(P<0.05).However,the total number of taxa,abundance,and biomass were significantly higher in the(SWII)net compared to(SWI)net.The average abundance of zooplankton collected in the SWI net gradually decreased over the years(P<0.05).There was no obvious difference in the community diversity indices of zooplankton collected by the two types of nets,and the community structure of zooplankton communities was consistent.展开更多
文摘The impacts of anthropogenisation modify permanently the distribution patterns of brackish and marine species. Globalization leads to a rapid increase of the numbers of introduced species anywhere in the world. Biological invasions often result in significant losses in the economic value, biological diversity and function of invaded ecosystems. This review presents the main pathways of introduction of non-indigenous species and the main benthic taxonomic groups being established and/or invasive along the French Channel-Atlantic coasts. A focus is put on main invasive marine species in the intertidal and subtidal zones of Brittany (France), among macroalgae (Sargassum muticum, Grateloupia turuturu, Undaria pinnatifida, Codium fragile and Gracilaria vermiculophylla), halophytes (Spartina alterniflora) and benthic invertebrates (Mollusks: Crepidula fornicata, Crassostrea gigas and Venerupis philippinarum). The species biology, introduction vectors, reproductive and dispersal capacities are considered, together with proliferation patterns along the Channel-Atlantic coasts. The ecological impacts of these species on the environment are also described, as well as the European regulations existing to limit alien species introduction and some examples of struggle against the invaders including eradication trials and biomass valorization. Last, the on-going impacts of global changes on alien species invasiveness along the Channel-Atlantic coasts are discussed.
基金Under the auspices of the National Natural Science Fundation (No.41901121,42276234)Open Funding of Zhejiang Collaborative Innovation Center for Land and Marine Spatial Utilization and Governance Research (No.LHGTXT-2024-004)+1 种基金Science and Technology Major Project of Ningbo (No.2022Z181)Key Laboratory of Coastal Zone Exploitation and Protection,Ministry of Natural Resources (No.2023CZEPK04)。
文摘Ecosystem services(ESs)refer to the continuous provisioning of ecosystem goods and services that benefit human beings.Over recent decades,rapid urbanization has exerted significant pressure on coastal ecosystems,resulting in biodiversity and habitat loss,environmental pollution,and the depletion of natural resources.In response to these environmental challenges,the Sustainable Development Goals(SDGs)were proposed.Given the pressing need to address these issues,understanding the changes in ESs under the SDGs is crucial for formulating specific ecological strategies.In this study,we first analyzed land use and cover change in the Zhejiang coasts of China during 2000–2020.Then,we investigated the spatiotemporal configuration of ESs by integrating carbon storage(CS),soil retention(SR),habitat quality(HQ)and water yield(WY)using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model.The driving mechanisms of ESs,which varied by space and time,were also explored using the Geo-detector method.The results revealed that,over the past two decades:1)the Zhejiang coasts have experienced a significant increase of 2783.72 km^(2) in built-up land areas and a continuous decrease in farmland areas due to rapid urbanization;2)owing to higher precipitation,extensive vegetation cover,and reduced anthropogenic disturbances,forests emerge as a crucial land use type for maintaining ecosystem services such as HQ,CS,WY,and SR;3)ESs have generally declined across the entire Zhejiang coasts,with a significant decrease observed in the northern areas and an increase in the southern areas spatially;4)the expansion of built-up land areas emerged as the primary factor affecting ecosystem services,while the vegetation factor has been increasingly significant and is expected to become predominant in the near future.Our study provides insights of understanding of ecosystem service theory and emphasizing the importance of preserving biodiversity for long-term sustainable development,and valuable scientific references to support the ecological management decision-making for local governments.
基金The Public Science and Technology Research Funds Projects of Ocean under contract No.201005015
文摘The classification and identification for Protoperidinium species are the most difficult work during its taxonomic study. In this research, taxonomic status of Protoperidinium was clarified by tracing its taxonomic history, 23 species belong to genus Protoperidinium on the coasts of China were preliminarily identified, and morphological description and plate patterns were given for each species. The key differences of similar species were also discussed in this study, we believe that P. oceanicum and P. murry, P. tumidum and P. fatulipes, P. globules and P.majus are separate species; P. diabolum should be treated as the valid name instead of the reported names Peridinium globosum or Peridinium longipes; the taxonomic relationship between P. punctulatum and P.subinerme requires further study.
文摘Introduction The International Conference on Asian and Pacific Coasts(APAC)is an international conference to promote academic and technical exchange on coastal related studies that include coastal engineering and coastal environmental problems,among the Asian and Pacific countries/regions.APAC
文摘The traditional idea proposes that granites on the east and west coasts of the Pacific Ocean are different. According to field investigations of the geology of the western United States coupled with the authors' long-term studies on granites in South China, granites both in eastern China and in the western United States are similar.
文摘An improved procedure for extracting the radiational S2 tide from analyzed S2 is presented in this paper. The major improvement is that the nonlinear constituents are eliminated from the analyzed principal semidiurnal tides on the basis of the 'credo of smoothness' of admittance before using the procedure given by Zetler. The semidiurnal radiationai S2 tides for 42 stations along China's coasts are calculated using the method presented in this paper, and, for comparison, the results from Zetler's method are also given. In addition, the radiational S2 tides for 10 stations are analyzed with the response method. The results show that the mean amplitude ratio (radiational to gravitational) is 0. 17, the mean phase difference (radiational minus gravitational) is 119° for China's coasts.
文摘The 7th International Conference on Asian and Pacific Coasts （APAC2013） will be held in Bali, Indonesia in September 2013. The aim of the conference is to promote scientific advancement, technological progress, information exchange, and cooperation among engineers and researchers in coastal, port, and ocean engineering and other related fields
文摘Summary Report The 6^th International Conference on Asian and Pacific Coasts, organised by the Department of Civil Engineering and the Department of Mechanical Engineering, The University of Hong Kong, was held in the Sheraton HK Hotels ＆ Towers, Hong Kong during December 14-16, 2011.
文摘The Holocene aeolian shell-clastic sandstones at 13 places along the coasts of Fujian, Guangdong and Hainan Provinces are studied in the following respects; describing their features from both macroscopic and microscopic views, listing their distributions, altitudes and forming ages, and discussing the nomenclatures of this kind of rock and its differences from beach rock.
文摘In order to evaluate the contamination of the Moroccan Mediterranean coasts by persistent organic pollutants we studied hydrocarbons and linear alkylbenzenes in bivalve tissues (cockles) collected seasonally from several points along the western Moroccan coasts in the Mediterranean Sea. Two fractions corresponding to non aromatic and aromatic hydrocarbons were analyzed by GC/FID and GC/MS. Non aromatic hydrocarbon concentrations vary in the range of 24.1 - 2731 μg/g dry weight (dw) while total n-alkanes vary from 2.2 to 68.2 μg/g. Few exceptions were noted with values up to 243 μg/g (dw), which is high compared to other Mediterranean sites. The presence of an important unresolved complex mixture (UCM) indicated a significant petroleum contamination, confirmed by the identification of 17α(H), 21β(H) hopanes. Biogenic contributions were also detected within the n-alkane distribution (n-C17, n-C18, n-C27, n-C29, n-C17, /Pr, n-C18, /Ph) and by the presence of alkenes. C13, and C14, linear alkylbenzenes were found at concentrations of 478 - 1954 ng/g. and point to pollutant inputs from wastewaters. Polycyclic aromatic hydrocarbons were present in low concentrations below the GC detection limit. The observed seasonal and spatial variations were linked to the magnitude of inputs from marine and land-based pollutant discharges.
文摘The feeding habits of 500 specimens of Pagrus pagrus （family： Sparidae）, inhabiting Benghazi Mediterranean Coast, were studied monthly from January to December 2008. The annual diet composition, monthly variations in the diet composition, the variations of diet with length and the intensity of feeding were studied. Pagruspagrus feed on a wide variety of prey types： crustaceans （38.3%）, molluscs （13.2 %）, echinoderms （11.4%）, polychaetes （10.7%）, digestive food （10.3%）, fish parts （7.1%）, seagrasses （6.4%） and sediments （2.7%）. The crustacean was the major food item all year round and it was found in all length groups. In the present study crustaceans, polycheates, seagrasses and sediments decreased as the size increased while molluscs, echinoderms, digestive food and fish parts increased as the fish size increased. The feeding intensity was quite high during the summer and early autumn.
文摘The sedimentary strata and deposition ages of the 'old red sand' distributed along the coasts of south Fujian and west Guangdong are determined by lithostratigraphy, magnetic stratigraphy and earth chemistry combined with TL, ESR and 14C-dating techniques. The research shows that the 'old red sand' was aeolian sediments deposited from 55 400 to 9 000 aBP, the last glacial period in the middle and later age of Late Pleistocene. Most of them deposited in two periods of 56-42 ka and 30-10 ka. The 'old red sand' deposited in the period of 30-10 ka, the later Wurm glacier substage (Q33), developed on the largest scale with the widest distribution.
基金supported by the Turkish Academy of Science,Young Scientist Award(TUBA-GEBIP/2013)
文摘In this study,acetone extracts of thirteen different species distributed in Turkey Coasts including tunicates,sea anemones,sponges and corals were investigated for their superoxide(SO)radical scavenging and cytotoxic activities.VWhile SO radical scavenging activity was tested using alkaline DMSO method,cytotoxic activity was tested by MTT assay against Hep-2 cancer cell line.As a result of bioactivity studies,Paramuricea clavata extract showed
基金Aquatic Environment Monitoring and Quality Research Program Funded by the National Center for Research and Development of Fisheries and Aquaculture(AIEA-RAF 7012 Project)
文摘The phytoplankton group’s composition is an excellent indicator of the state of coastal waters. The aim of this study is to explore spatial variability of phytoplankton in shallow coastal areas from different regions(East, Center and West) of the Algerian coast. The quantitative and qualitative study of the phytoplankton population was conducted on samples taken during the 2012–2013 period by the research vessel GRINE BELKACEM. The qualitative results show a significant diversity of diatoms and dinoflagellates, which rank first and second in the total flora(Fr > 50%). This finding is also confirmed quantitatively by the abundance values in both 2013 and 2012 samples which largely exceeds the average value in most other areas of the western region(56%) and slightly exceeding 52% in all central areas which represent an equi-distribution between diatoms and dinoflagellates. The Dinoflagellates contribute significantly to the quantitative richness in the eastern region(>60%). The minimum value of Dia/Dino index, recorded in the eastern region confirms the dominance of the dinoflagellates especially in Skikda(0.31)(Skikda).However, our results reveal the presence, in smaller proportion, of other groups such as the cocolithophoridae and euglenophyceae.
文摘Objective:To determine the concentrations of Fe,Zn,Ni,Cu,Mn,Pb,Cd and Co in macroalgae from Sinop coasts of the Sounthern Black Sea.Methods:Chlorophyta-green algae(Chaetomorpha spp.,Cladophora spp.,Ulva linza,Ulva intestinalis,Ulva lactuca,Ulva rigida);Ochrophyta-brown alga[Cystoseira barbata(C.barbata)]and Rhodophyta-red algae(Ceramium spp.,Corallina panizzoi)were collected seasonally in the year 2010 from the upper infralittoral zone of inner harbour,outer harbour,Gerze and Ayancık of Sinop coasts of the Black Sea.The samples were analysed by atomic absorption spectrophotometer in order to determine heavy metal levels in different algal division species along Sinop coasts and to provide information of marine environment quality as marine strategy framework directive is aimed to ensure good environmental status of the seas by 2020 in the European Union.Results:The results showed that metal concentrations in all studied green algae,brown alga and red algae increase in the order:Cd<Co<Ni<Pb<Cu<Zn<Mn<Fe,Cd<Co<Cu<Ni<Pb<Mn<Zn<Fe and Co<Cd<Ni<Cu<Pb<Mn<Zn<Fe,respectively.In all divisions,among the essential elements the highest concentrations exhibited by Fe,in Gerze station-(2328±89)μg/g dry weight in Chaetomorpha spp.;(2143±78)μg/g dry weight in C.barbata and(968±20)μg/g dry weight in Ceramium spp.Conclusions:The highest accumulation of different metals in the analysed algae species were:Fe and Co in Chaetomorpha spp.,Zn in C.barbata,Ni and Cu in Ulva linza,Mn in Ulva intestinalis,Pb and Cd in Corallina panizzoi.
文摘There is now an abundance of evidence of the importance of coastal systems as the land-sea interface,creating spe-cific habitats and ecosystems and as a favoured location for human settlement,taking advantage of the many sys-tem services available(ecological,land/seascape,access,etc.).This has created complex socio-eco-geomorpho-logical interactions and a high demand to adapt human activity to improve the inherent resilience of the collec-tive system,especially in-the-face of the challenges that arise from climate change.As we pointed out in our Edi-torial to launch Anthropocene Coasts(Gao and Townend,2018),human activities dominate over many of the natu-ral processes that used to exclusively shape our coastal regions.Coastal development and especially major infra-structure,create fixed points on the coast,urban areas discharge large volumes of waste into the sea,coastal eco-systems are squeezed out of existence,or have to com-pete with invasive species,and coastal communities are facing hazards of increasing severity.
文摘Find It What do boat captai ns try to do?W hale and dolphin watching is a popular thing to do off the coast of Hualien.*It is an amazing adventure!Imagine this:You are on a boat.Then a big whale jumps out of the water.
基金the Open Fund of Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation(No.202309)the Science and Technology Program of the North China Sea Bureau of the Ministry of Natural Resources(No.202302)。
文摘This study analyzed data from zooplankton surveys conducted in the coastal waters of Rizhao during the summers of2020–2023 to deterine trends in the number of taxa,dominant taxa,biomass,abundance,and biodiversity over the 4 years.The results indicated the presence of 41 zooplankton species belonging to Hydromedusa,Ctenophora,Copepoda,Cladocera,Amphipoda,Decapoda,Tunicata,Chaetognatha,Chordata,along with 19 types of planktonic larvae.The total number of taxa showed little change over the 4 years.A total of 10 dominant species and 8 dominant larval types were identified in the surveyed waters,and the dominant species vary from year to year.In terms of community structure,planktonic larvae,hydromedusae,and copepods were the dominant taxa.The proportion of planktonic larvae showed an upward trend,while that of hydromedusae exhibited a downward trend.The zooplankton collected by the shallow water type I(SWI)net and shallow water type II(SWII)net in the survey area could each be divided into 2 communities.Correlation analysis revealed that the abundance of zooplankton collected by the(SWI)net was significantly negatively correlated with water temperature(P<0.05),while the Shannon-Wiener index(H')was significantly positively correlated with water temperature(P<0.05).However,the total number of taxa,abundance,and biomass were significantly higher in the(SWII)net compared to(SWI)net.The average abundance of zooplankton collected in the SWI net gradually decreased over the years(P<0.05).There was no obvious difference in the community diversity indices of zooplankton collected by the two types of nets,and the community structure of zooplankton communities was consistent.
