Extensive research has been conducted on how large impoundments and reservoirs affect hydrologic, geomorphologic and ecological processes in downstream ecosystems. Surprisingly, few studies have addressed the effects ...Extensive research has been conducted on how large impoundments and reservoirs affect hydrologic, geomorphologic and ecological processes in downstream ecosystems. Surprisingly, few studies have addressed the effects of smaller impoundments and constructed ponds. Pond construction has been considered an important tool for managers seeking to reduce sediment, nutrient and pollutant loads, and increase habitat heterogeneity in streams in an effort to conserve or enhance aquatic species diversity. However, we lack information on the interaction between ponds and stream habitats, which may compromise the efficacy of conservation efforts. The objective of this review is to outline possible physical and biological changes to stream ecosystems resulting from pond construction. Greater understanding of how ponds influence watershed processes at various spatial scales is crucial to evaluating the effects of constructed ponds on stream ecosystems.展开更多
The species of aquatic beetles and their distributions in lotic and lentic habitats were investigated during July to August of 2005 and 2006 in Xinjiang Uygur Autonomous Region, China. A total of 66 species belonging ...The species of aquatic beetles and their distributions in lotic and lentic habitats were investigated during July to August of 2005 and 2006 in Xinjiang Uygur Autonomous Region, China. A total of 66 species belonging to 7 beetle families （Dytiscidae, Gyrinidae, Haliplidae, Helophoridae, Noteridae, Hydraenidae, Hydrophilidae） are recorded, of which 16 are new records of aquatic beetles for China.展开更多
In areas highly affected by anthropogenic disturbances,artificial(human-made)freshwater ecosystems can provide habitat for maintaining and conserving regional freshwater biodiversity.We assessed how the physical habit...In areas highly affected by anthropogenic disturbances,artificial(human-made)freshwater ecosystems can provide habitat for maintaining and conserving regional freshwater biodiversity.We assessed how the physical habitat of artificial ponds affected the structure of benthic macroinvertebrate assemblages.To do so,we tested two hypotheses.(1)Physical habitat disturbances are not detrimental to the diversity of nearby artificial ponds,and(2)Physical habitat disturbances do not cause significant shifts in taxonomic composition.Our results rejected both null hypotheses,i.e.,macroinvertebrate diversity metrics correlated significantly and positively with Physical Habitat Integrity index scores,and only sites with high habitat condition scores were significantly associated with sensitive indicator taxa.Our results highlight the importance of maintaining physical habitat conditions for sustaining the ecological health of artificial ponds.展开更多
Aquatic vegetation plays a crucial role in wetland ecosystems but are sensitive to human activities,especially in urban lakes where the loss of aquatic plant diversity is pronounced.Recently,there has been increasing ...Aquatic vegetation plays a crucial role in wetland ecosystems but are sensitive to human activities,especially in urban lakes where the loss of aquatic plant diversity is pronounced.Recently,there has been increasing interest in whether the restoration of urban lakes can alleviate ecological degradation,with changes in aquatic plant diversity serving as important ecological indicators.However,methods for evaluating aquatic plant community diversity still require further refinement.Despite the widespread application of environmental DNA(eDNA)in monitoring aquatic biota,its use for assessing aquatic plant community diversity,particularly through metabarcoding methods remains limited.This study assessed aquatic plant diversity and spatial distribution patterns in Donghu Lake and its surrounding wetlands,a typical eutrophic urban lake in China,using both traditional community surveys and eDNA methods.Surveys covered both the littoral zone and open water areas,and considered various eDNA sample types.A total of 69 aquatic plant species were identified by eDNA while 50 were identified by traditional survey methods.This shows that eDNA identified more aquatic plant species than traditional survey methods.Both methods showed similar levels of aquatic plant diversity(alpha diversity)within each habitat type,with no significant differences found between the methods in either the ponds or the lake area.In contrast,both methods consistently identified significant differences in aquatic plant community composition(beta diversity)between the pond and lake areas.Moreover,distinct plant communities were found in different areas of the pond,while no significant variation was observed among regions within the lake.This study provides crucial data for assessing biodiversity in an urban lake,suggesting the potential mitigation of aquatic ecological degradation in Donghu Lake.Our findings also demonstrate the potential of eDNA metabarcoding as a tool for evaluating aquatic plant diversity in habitats within lentic ecosystems.展开更多
文摘Extensive research has been conducted on how large impoundments and reservoirs affect hydrologic, geomorphologic and ecological processes in downstream ecosystems. Surprisingly, few studies have addressed the effects of smaller impoundments and constructed ponds. Pond construction has been considered an important tool for managers seeking to reduce sediment, nutrient and pollutant loads, and increase habitat heterogeneity in streams in an effort to conserve or enhance aquatic species diversity. However, we lack information on the interaction between ponds and stream habitats, which may compromise the efficacy of conservation efforts. The objective of this review is to outline possible physical and biological changes to stream ecosystems resulting from pond construction. Greater understanding of how ponds influence watershed processes at various spatial scales is crucial to evaluating the effects of constructed ponds on stream ecosystems.
基金supported by Scientific Research Program of the Higher Education Institution of Xinjiang (No. XJEDU2004S25)
文摘The species of aquatic beetles and their distributions in lotic and lentic habitats were investigated during July to August of 2005 and 2006 in Xinjiang Uygur Autonomous Region, China. A total of 66 species belonging to 7 beetle families （Dytiscidae, Gyrinidae, Haliplidae, Helophoridae, Noteridae, Hydraenidae, Hydrophilidae） are recorded, of which 16 are new records of aquatic beetles for China.
基金This research was supported by the Programa de Pesquisa e Desenvolvimento of Companhia Energetica de Minas Gerais(CEMIG)P&D Aneel-Cemig GT-599 and MSL received a post-doc scholarship from this Project,and from CAPES(PDPG-AMAZONIA-LEGAL Project 88887.510266/2020–00)Conselho Nacional de Desenvolvimento Científico e Tecnologico(CNPq+1 种基金research productivity grants 304060/2020-8 to MC and 316489/2021-2 to JCS),FAPEMIG research grant to MC(PPM 00104-18)Coordenaçao de Aperfeiçoamento de Pessoal de Nível Superior(CAPES)–Finance Code 001.
文摘In areas highly affected by anthropogenic disturbances,artificial(human-made)freshwater ecosystems can provide habitat for maintaining and conserving regional freshwater biodiversity.We assessed how the physical habitat of artificial ponds affected the structure of benthic macroinvertebrate assemblages.To do so,we tested two hypotheses.(1)Physical habitat disturbances are not detrimental to the diversity of nearby artificial ponds,and(2)Physical habitat disturbances do not cause significant shifts in taxonomic composition.Our results rejected both null hypotheses,i.e.,macroinvertebrate diversity metrics correlated significantly and positively with Physical Habitat Integrity index scores,and only sites with high habitat condition scores were significantly associated with sensitive indicator taxa.Our results highlight the importance of maintaining physical habitat conditions for sustaining the ecological health of artificial ponds.
基金supported by the Key Research and Development Project of Hubei Province(Grant No.2023BCB107)the Wuhan Science and Technology Plan Project(Grant No.2023020402010623)the Strategic Research and Consulting Project under the Chinese Academy of Engineering Local Collaboration Program(Grant No.HB2025B07).
文摘Aquatic vegetation plays a crucial role in wetland ecosystems but are sensitive to human activities,especially in urban lakes where the loss of aquatic plant diversity is pronounced.Recently,there has been increasing interest in whether the restoration of urban lakes can alleviate ecological degradation,with changes in aquatic plant diversity serving as important ecological indicators.However,methods for evaluating aquatic plant community diversity still require further refinement.Despite the widespread application of environmental DNA(eDNA)in monitoring aquatic biota,its use for assessing aquatic plant community diversity,particularly through metabarcoding methods remains limited.This study assessed aquatic plant diversity and spatial distribution patterns in Donghu Lake and its surrounding wetlands,a typical eutrophic urban lake in China,using both traditional community surveys and eDNA methods.Surveys covered both the littoral zone and open water areas,and considered various eDNA sample types.A total of 69 aquatic plant species were identified by eDNA while 50 were identified by traditional survey methods.This shows that eDNA identified more aquatic plant species than traditional survey methods.Both methods showed similar levels of aquatic plant diversity(alpha diversity)within each habitat type,with no significant differences found between the methods in either the ponds or the lake area.In contrast,both methods consistently identified significant differences in aquatic plant community composition(beta diversity)between the pond and lake areas.Moreover,distinct plant communities were found in different areas of the pond,while no significant variation was observed among regions within the lake.This study provides crucial data for assessing biodiversity in an urban lake,suggesting the potential mitigation of aquatic ecological degradation in Donghu Lake.Our findings also demonstrate the potential of eDNA metabarcoding as a tool for evaluating aquatic plant diversity in habitats within lentic ecosystems.
