Spatial organization of fish assemblages and its relation to environmental factors in the lower Yalong River, China

Based on data collected from 31 sampling sites during June and August 2018 in the three ordered rivers (the tributaries of the Anning River, the Anning River, and the lower Yalong River), fish assemblages in the region were investigated regarding their spatial variations, and their relationship with environmental factors. In total, 48 species were collected, with 47 being native and one being exotic. Among them, one was classified as endangered. Fish species diversity increased first and then decreased, reaching its peak in the mid-order river. Obvious variations were found in fish assemblages depending on the stream order. There were three site-groups: one covering the tributaries of the Anning River, one covering the Anning River, and one covering the lower Yalong River. From low- to high-order rivers, the alterations of key species within the fish communities exhibited a turnover pattern. The fish assemblages in the low-order river were primarily dominated by Nemacheilida, whereas th..., , , # Data from: Spatial organization of fish assemblages and its relation to environmental factors in the lower Yalong River, China

## Description of the Data and file structure

The dataset is composed of two Excel files: (1) Env data. xlsx file that contain the information on the environmental factor of the lower Yalong River; (2) Spe data. xlsx file that contain the information on the fish assemblages of the lower Yalong River (list in N%).

### Contents

1.ReadMe.txt - Description of data package

2\. Env data. xlsx file - the information on the environmental factor of the lower Yalong River. Variables and units can be found in this file.

3\. Spe data. xlsx file - the information on the fish assemblages of the lower Yalong River. Values are percentage.

### Sampling site information data：

Y1-Y10: the lower Yalong River

A1-A14: the Anning River

Z1-Z7: the tributaries of the Anning River

## Contact

Please contact Baoshan Ma if you need additional information on these datasets or n...,