Temporal Changes of Fish Diversity and Driver Factors in a National Nature Reserve, China
Dongmei Luo,
Ziwei Wan,
Chenchen Jia,
Yiqiu Zhu,
Qin Zou,
Fangfei Ye,
Yan Feng,
Mi Zhang,
Xiaoping Wu,
Xiongjun Liu,
Shan Ouyang
Affiliations
Dongmei Luo
School of Life Sciences, Nanchang University, Nanchang 330031, China
Ziwei Wan
School of Life Sciences, Nanchang University, Nanchang 330031, China
Chenchen Jia
School of Life Sciences, Nanchang University, Nanchang 330031, China
Yiqiu Zhu
Aquatic Biology Protection and Rescue Center of Jiangxi Province, Nanchang 330031, China
Qin Zou
Lushan National Nature Reserve Administration of Jiangxi Province, Nanchang 330031, China
Fangfei Ye
Lushan National Nature Reserve Administration of Jiangxi Province, Nanchang 330031, China
Yan Feng
Lushan National Nature Reserve Administration of Jiangxi Province, Nanchang 330031, China
Mi Zhang
Lushan National Nature Reserve Administration of Jiangxi Province, Nanchang 330031, China
Xiaoping Wu
School of Life Sciences, Nanchang University, Nanchang 330031, China
Xiongjun Liu
Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas, School of Life Science, Jiaying University, Meizhou 514015, China
Shan Ouyang
School of Life Sciences, Nanchang University, Nanchang 330031, China
Freshwater-fish diversity declined rapidly due to multiple anthropogenic disturbances. The loss of fish diversity often manifested itself in taxonomic homogenization over time. Knowledge of multi-faceted diversity (i.e., species, functional, and phylogenetic diversity) perspectives is important for biodiversity assessment and conservation planning. Here, we analyzed the change of the species diversity and phylogenetic diversity of fish in 2008 and 2021 as well as explored the driver factors of the biodiversity patterns in the Lushan National Nature Reserve. The results showed that the species diversity and phylogenetic diversity of fish have declined from 2008 to 2021, with five species lost over time. We found an overall homogenization trend in the fish fauna of the study area, with a 4% increase in taxonomic similarity among the rivers. Additionally, we found that community structure of fish was significantly different among the rivers, and environmental filtering was the main contributor to the phylogenetic diversity of fish in 2008 and 2021. This study provides new insight into the patterns and drivers of fish-biodiversity change in the broader Yangtze River basin and informs management efforts.
