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Functional Responses of Phytoplankton Assemblages to Watershed Land Use and Environmental Gradients

文献类型： 外文期刊

作者： Du, Xue 1 ; Song, Dan 1 ; Ming, Kun 3 ; Yang, Jingshuang 4 ; Jin, Xing 1 ; Wang, Huibo 1 ; Liu, Hui 1 ; Wang, Le 1 ; Zhao, Chen 1 ; Huo, Tangbin 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin, Peoples R China

2.Heilongjiang River Basin Fishery Ecol Environm Mo, Minist Agr & Rural Affairs, Harbin, Peoples R China

3.Joint Logist Support Force PLA, Harbin Management Stn, Fourth Adm Bur Reserve Assets, Harbin, Peoples R China

4.Jilin Chagan Lake Natl Nat Reserve Adm, Songyuan, Peoples R China

关键词： algae; community structure; eutrophication; functional-based approach; human disturbance

期刊名称：FRONTIERS IN ECOLOGY AND EVOLUTION （ 影响因子：3.0； 五年影响因子：3.8 ）

ISSN： 2296-701X

年卷期： 2022 年 9 卷

页码：

收录情况： SCI

摘要： Watershed land-use changes have been identified as major threats to lake fauna, subsequently affecting ecosystem functioning. In this study, the functional-based approach was used to examine the effects of land use and environmental changes on phytoplankton communities in four selected lakes in Northeast China. We also identified the sensitive functional traits as indicators of environmental stressors. The integration of RLQ analysis with the fourth-corner approach significantly identified five of 18 functional trait categories, including flagella, filamentous, unicellular, mixotrophic, and chlorophyll c, as potential indicators to changes in watershed land-use intensity and environmental gradients. Significant relationships between traits and land use and water quality highlighted the consequential indirect impact of extensive agricultural and urban development on phytoplankton via allochthonous nutrient inputs and various contaminants. In addition, the functional richness of phytoplankton assemblages generally increased along with surface area and forests, but decreased along with intensive agricultural and urban land use, implying that functional homogenization may cause a reduction in ecosystem productivity and reliability to land-use intensity. Given the superior performance of the functional-based approach, our findings also highlighted the importance of the application of both the biological traits and functional diversity index in monitoring programs for lake ecosystems.

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