Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain
Uncovering the mechanisms underlying phytoplankton community assembly remains a major challenge in freshwater ecology. The roles of environmental filtering and spatial processes in shaping phytoplankton metacommunity in Tibetan floodplain ecosystems under various hydrological conditions are still un...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1122838/full |
| _version_ | 1797902934021767168 |
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| author | Zhenyu Huang Baozhu Pan Janne Soininen Xinyuan Liu Yiming Hou Xing Liu |
| author_facet | Zhenyu Huang Baozhu Pan Janne Soininen Xinyuan Liu Yiming Hou Xing Liu |
| author_sort | Zhenyu Huang |
| collection | DOAJ |
| description | Uncovering the mechanisms underlying phytoplankton community assembly remains a major challenge in freshwater ecology. The roles of environmental filtering and spatial processes in shaping phytoplankton metacommunity in Tibetan floodplain ecosystems under various hydrological conditions are still unclear. Here, multivariate statistics and a null model approach were used to compare the spatiotemporal patterns and assembly processes of phytoplankton communities in the river-oxbow lake system of Tibetan Plateau floodplain between non-flood and flood periods. The results showed that phytoplankton communities had significant seasonal and habitat variations, with the seasonal variations being more remarkable. Phytoplankton density, biomass, and alpha diversity were distinctly lower in the flood than non-flood period. The habitat differences (rivers vs. oxbow lakes) in phytoplankton community were less pronounced during the flood than non-flood period, most likely due to the increased hydrological connectivity. There was a significant distance–decay relationship only in lotic phytoplankton communities, and such relationship was stronger in the non-flood than flood period. Variation partitioning and PER-SIMPER analysis showed that the relative role of environmental filtering and spatial processes affecting phytoplankton assemblages varied across hydrological periods, with environmental filtering dominating in the non-flood period and spatial processes in the flood period. These results suggest that the flow regime plays a key role in balancing environmental and spatial factors in shaping phytoplankton communities. This study contributes to a deeper understanding of ecological phenomena in highland floodplains and provides a theoretical basis for floodplain ecosystem maintenance and ecological health management. |
| first_indexed | 2024-04-10T09:25:03Z |
| format | Article |
| id | doaj.art-1249af68f38848de9eccd0aba01842be |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-10T09:25:03Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-1249af68f38848de9eccd0aba01842be2023-02-20T04:53:02ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2023-02-011410.3389/fmicb.2023.11228381122838Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplainZhenyu Huang0Baozhu Pan1Janne Soininen2Xinyuan Liu3Yiming Hou4Xing Liu5State Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shanxi, ChinaState Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shanxi, ChinaDepartment of Geosciences and Geography, University of Helsinki, Helsinki, FinlandState Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shanxi, ChinaState Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shanxi, ChinaState Key Laboratory of Eco-Hydraulic in Northwest Arid Region of China, Xi’an University of Technology, Xi’an, Shanxi, ChinaUncovering the mechanisms underlying phytoplankton community assembly remains a major challenge in freshwater ecology. The roles of environmental filtering and spatial processes in shaping phytoplankton metacommunity in Tibetan floodplain ecosystems under various hydrological conditions are still unclear. Here, multivariate statistics and a null model approach were used to compare the spatiotemporal patterns and assembly processes of phytoplankton communities in the river-oxbow lake system of Tibetan Plateau floodplain between non-flood and flood periods. The results showed that phytoplankton communities had significant seasonal and habitat variations, with the seasonal variations being more remarkable. Phytoplankton density, biomass, and alpha diversity were distinctly lower in the flood than non-flood period. The habitat differences (rivers vs. oxbow lakes) in phytoplankton community were less pronounced during the flood than non-flood period, most likely due to the increased hydrological connectivity. There was a significant distance–decay relationship only in lotic phytoplankton communities, and such relationship was stronger in the non-flood than flood period. Variation partitioning and PER-SIMPER analysis showed that the relative role of environmental filtering and spatial processes affecting phytoplankton assemblages varied across hydrological periods, with environmental filtering dominating in the non-flood period and spatial processes in the flood period. These results suggest that the flow regime plays a key role in balancing environmental and spatial factors in shaping phytoplankton communities. This study contributes to a deeper understanding of ecological phenomena in highland floodplains and provides a theoretical basis for floodplain ecosystem maintenance and ecological health management.https://www.frontiersin.org/articles/10.3389/fmicb.2023.1122838/fullphytoplankton communitycommunity assemblyoxbow lakesTibetan Plateauflood pulsehydrological connectivity |
| spellingShingle | Zhenyu Huang Baozhu Pan Janne Soininen Xinyuan Liu Yiming Hou Xing Liu Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain Frontiers in Microbiology phytoplankton community community assembly oxbow lakes Tibetan Plateau flood pulse hydrological connectivity |
| title | Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain |
| title_full | Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain |
| title_fullStr | Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain |
| title_full_unstemmed | Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain |
| title_short | Seasonal variation of phytoplankton community assembly processes in Tibetan Plateau floodplain |
| title_sort | seasonal variation of phytoplankton community assembly processes in tibetan plateau floodplain |
| topic | phytoplankton community community assembly oxbow lakes Tibetan Plateau flood pulse hydrological connectivity |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2023.1122838/full |
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