生态学杂志2017，Vol.36Issue(10)：2795-2802,8.DOI:10.13292/j.1000-4890.201710.023
基于划分强度的巢湖流域河流鱼类群落的空间格局
Spatial patterns of fish assemblages based on classification strengths in the rivers o f Chaohu basin
摘要
Abstract
Identifying the spatial pattern of fish assemblages is essential for the conservation and management of fish species diversity.Based on the data collected from 66 stream segments within the Chaohu basin in October 2013,we examined how stream fish assemblages varied spatially and assessed the classification strengths of three spatial schemes (i.e.,sub-basin,stream order and ecoregion) and fish taxonomic clusters in classifying fish assemblages.Our results showed that fish assemblages did not vary significantly among sub-basins and stream orders but differed significantly among ecoregions.For the spatial schemes of sub-basin and stream order,the mean within-group similarity of fish assemblages was not significantly different from the mean between-group similarity,and thus the two spatial schemes presented very low classification strength for classifying fish assemblages.But for the spatial scheme of ecoregion,the mean within-group similarity of fish assemblages was significantly higher than the mean between-group similarity,and thus its classification strength was relatively high.However,compared with the scheme of taxonomic clusters,the classification strength of the ecoregion scheme was relatively low.The results indicated that the spatial pattern of fish assemblages depended on the landscape conditions to a certain extent in the Chaohu basin,and also on the local environmental factors.In future research,it is necessary to further clarify the main environmental factors affecting the spatial pattern of fish assemblages in the Chaohu basin and the spatial distribution of these key factors,so as to provide scientific basis for the conservation and management of fish species diversity in the Chaohu basin.关键词
空间体系/划分强度/相似性系统树/鱼类群落/巢湖流域Key words
spatial classification scheme/classification strength/similarity dendrogram/fish assemblage/Chaohu basin引用本文复制引用
钱红,储玲,朱仁,蔡永久,严云志..基于划分强度的巢湖流域河流鱼类群落的空间格局[J].生态学杂志,2017,36(10):2795-2802,8.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07501-001-03)和国家自然科学基金项目(31372227)资助. （2012ZX07501-001-03）
