Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River
Dam construction disrupts river continuity, and alters hydrological dynamics and the distributional composition of aquatic organisms. Understanding the spatial distribution of aquatic communities following dam construction is crucial for the effective management and restoration of riverine ecosystem...
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MDPI AG
2024-12-01
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| author | Mengyue Zhang Guangxia Shang Sen Ding |
| author_facet | Mengyue Zhang Guangxia Shang Sen Ding |
| author_sort | Mengyue Zhang |
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| description | Dam construction disrupts river continuity, and alters hydrological dynamics and the distributional composition of aquatic organisms. Understanding the spatial distribution of aquatic communities following dam construction is crucial for the effective management and restoration of riverine ecosystems. This study focused on the macroinvertebrate community of the Hanjiang River during the low-flow period, and explored the relationship between water quality indices and bioindicators. The results revealed significant changes in both the composition and functional feeding groups (FFGs) of macroinvertebrate communities from the upper to the lower reaches of the river. Compared to the natural reach, the dam-affected reaches showed a decrease in the number of sensitive taxa of Ephemeroptera, Plecoptera, and Trichoptera (EPT), and an increase in the number of moderate tolerant taxa of Gastropoda and tolerant taxa of Oligochaeta. The collector-gatherers (CGs) dominated in the Hanjiang River. In the dam-affected reaches, the relative abundance of collector-filterers (CFs) and shredders (SHs) appeared to decrease, while that of scrapers (SCs) and CGs increased. Principal component analysis (PCA) revealed that latitude and dissolved oxygen (DO) played a crucial role in the spatial pattern of macroinvertebrates, and the biotic index (BI) and family biotic index (FBI) more accurately reflected the level of organic pollution in the Hanjiang River. The findings of this study are valuable for ecological management and biodiversity conservation following dam construction. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-a7d232f18a9e4c04a44cb11b3b03cbe92024-12-27T14:21:36ZengMDPI AGDiversity1424-28182024-12-01161277210.3390/d16120772Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams RiverMengyue Zhang0Guangxia Shang1Sen Ding2State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaDam construction disrupts river continuity, and alters hydrological dynamics and the distributional composition of aquatic organisms. Understanding the spatial distribution of aquatic communities following dam construction is crucial for the effective management and restoration of riverine ecosystems. This study focused on the macroinvertebrate community of the Hanjiang River during the low-flow period, and explored the relationship between water quality indices and bioindicators. The results revealed significant changes in both the composition and functional feeding groups (FFGs) of macroinvertebrate communities from the upper to the lower reaches of the river. Compared to the natural reach, the dam-affected reaches showed a decrease in the number of sensitive taxa of Ephemeroptera, Plecoptera, and Trichoptera (EPT), and an increase in the number of moderate tolerant taxa of Gastropoda and tolerant taxa of Oligochaeta. The collector-gatherers (CGs) dominated in the Hanjiang River. In the dam-affected reaches, the relative abundance of collector-filterers (CFs) and shredders (SHs) appeared to decrease, while that of scrapers (SCs) and CGs increased. Principal component analysis (PCA) revealed that latitude and dissolved oxygen (DO) played a crucial role in the spatial pattern of macroinvertebrates, and the biotic index (BI) and family biotic index (FBI) more accurately reflected the level of organic pollution in the Hanjiang River. The findings of this study are valuable for ecological management and biodiversity conservation following dam construction.https://www.mdpi.com/1424-2818/16/12/772benthic macroinvertebratesdamstructural parametersfunctional feeding groupsbiological indices |
| spellingShingle | Mengyue Zhang Guangxia Shang Sen Ding Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River Diversity benthic macroinvertebrates dam structural parameters functional feeding groups biological indices |
| title | Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River |
| title_full | Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River |
| title_fullStr | Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River |
| title_full_unstemmed | Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River |
| title_short | Community Structural and Functional Features of Benthic Macroinvertebrates in a Cascade-Dams River |
| title_sort | community structural and functional features of benthic macroinvertebrates in a cascade dams river |
| topic | benthic macroinvertebrates dam structural parameters functional feeding groups biological indices |
| url | https://www.mdpi.com/1424-2818/16/12/772 |
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