Effect of complex hydraulic variables and physicochemical factors on freshwater mussel density in the largest floodplain lake,China  

作　　者：Chenchen Jia Chenhuizi Wu Xiaochen Huang Chunhua Zhou Shan Ouyang Xiongjun Liu Xiaoping Wu 

机构地区：[1]School of Life Sciences,Nanchang University,Nanchang 330031,China [2]Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas,School of Life Sciences,Jiaying University,Meizhou 514015,China

出　　处：《Ecological Processes》2023年第1期232-245,共14页生态过程（英文）

基　　金：supported by the National Key R&D Program of China(2018YFD0900801);Educational Commission of Guangdong Province of China(2021ZDZX4054).

摘　　要：Background Habitat degradation and flow regime alterations are two of the most prominent and common impact factors to freshwater mussel populations.Knowledge of the correlation between freshwater mussel distribution,density and habitat characteristics is important for maintaining and restoring their biodiversity and ecological functions.Information on predicting habitat suitability of freshwater mussels is lacking in China.Here,we aimed to analyze the correlation between freshwater mussel density and complex hydraulic and physicochemical variables to predict habitat suitability.Results The results showed that four complex hydraulic variables(boundary Reynolds number,critical shear stress,bed roughness and mean sediment particle size)and four physicochemical variables(water temperature,chlorophylla,transparency and pH)were key factors for predicting habitat suitability of freshwater mussels.Freshwater mussel density was significantly correlated with Froude number,water temperature and chlorophyll-a.Conclusions Our results confirmed that higher freshwater mussel density would be associated with areas that are stable in complex hydraulic and physicochemical variables.These results provide an important insight into the conservation of freshwater mussel diversity and their habitat restoration in China and globally.

关 键 词：Habitat suitability Freshwater mussel Complex hydraulic variable Habitat degradation 

分 类 号：Q958.8[生物学—动物学] X171.4[环境科学与工程—环境科学]