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赣江上游鱼类的分类多样性格局和组成。

Taxonomic diversity pattern and composition of fish species in the upper reaches of Ganjiang River, Jiangxi, China.

机构信息

School of Life Sciences, Nanchang University, Nanchang, Jiangxi, P. R. China.

Ganzhou Fisheries Research Institute, Ganzhou, Jiangxi, P. R. China.

出版信息

PLoS One. 2020 Nov 16;15(11):e0241762. doi: 10.1371/journal.pone.0241762. eCollection 2020.

DOI:10.1371/journal.pone.0241762
PMID:33196644
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7668606/
Abstract

Maintaining fish diversity is essential for environmental protection. To characterize the fish composition of the tributaries and mainstream in the upper reaches of the Ganjiang River, we identified seventy-five species of 15 families in 14 sampling sites. These data were analyzed using the inclusion index at the taxonomic level (TINCLi), the importance value index (IVI), the taxonomic diversity indices (Δ+ and Λ+), cluster analysis and non-metric multidimensional scaling (nMDS). The results showed that the most common and dominant order was the Cypriniformes, represented most frequently by Hemiculter leucisculus among the sample sites. Most fishes were omnivorous, mountain stream or settled fish that lay sinking or viscid eggs. Most sites showed a trend of more discrete distribution from high latitude to low latitude. According to the taxonomic diversity indices, the fish taxonomic composition in the upper reaches of Ganjiang River is uneven. The Bray-Curtis resemblance matrix and nMDS showed that the habitats of the Ganjiang River were divided into four areas. The results will provide information needed for freshwater fish resource protection in the upper reaches of the Ganjiang River.

摘要

维持鱼类多样性对于环境保护至关重要。为了描述赣江上游支流和干流的鱼类组成，我们在 14 个采样点鉴定出了 15 科 75 种鱼类。使用分类水平包含指数（TINCLi）、重要值指数（IVI）、分类多样性指数（Δ+和 Λ+）、聚类分析和非度量多维标度（nMDS）对这些数据进行了分析。结果表明，最常见和优势的目是鲤形目，其中在所有采样点中最常见的是鲫。大多数鱼类为杂食性，是山溪或定居鱼类，产卵为沉性或粘性卵。大多数采样点表现出从高纬度到低纬度分布更为离散的趋势。根据分类多样性指数，赣江上游的鱼类分类组成是不均匀的。Bray-Curtis 相似性矩阵和 nMDS 表明，赣江的生境分为四个区域。研究结果将为赣江上游淡水鱼类资源保护提供所需的信息。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/d6e2bf5021f9/pone.0241762.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/c5232ce05300/pone.0241762.g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/b869936b65cb/pone.0241762.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/d6e2bf5021f9/pone.0241762.g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/c5232ce05300/pone.0241762.g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/65107737d956/pone.0241762.g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/bb15b14ff77b/pone.0241762.g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/b869936b65cb/pone.0241762.g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d823/7668606/d6e2bf5021f9/pone.0241762.g005.jpg

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