生态学杂志2024，Vol.43Issue(4)：982-992,11.DOI:10.13292/j.1000-4890.202404.036
基于大型底栖动物功能摄食类群的太湖流域河流生态系统功能特征
The characteristics of ecosystem functions in the Lake Taihu basin based on the functional feeding groups of benthic macroinvertebrates
摘要
Abstract
We collected data of benthic macroinvertebrates and environmental factors of the Lake Taihu basin from 73 sampling sites,aiming to explore the functional characteristics of river ecosystem based on the parameters of functional feeding groups.The relationships between biodiversity indices and parameters of functional feeding groups in two ecological regions were analyzed.The results showed that biodiversity indices of the western hilly area were generally higher than those of the eastern plain area.The correlations between parameters of functional feeding groups and functional diversity indices were higher than other biodiversity indices.Specially,material circulation was negatively correlated with functional evenness index and species diversity indices,while material longitudinal transport was positively correlated with functional richness index and Rao Q index.There was also a positive correla-tion between coastal material input and species diversity indices.Results of redundancy analysis indicated that dis-solved oxygen,total nitrogen concentration,nitrate nitrogen concentration,substrate index,and turbidity were the environmental factors with significant influences on biodiversity indices,while dissolved oxygen and nitrate nitrogen concentration greatly influenced the parameters of functional feeding groups.According to the piecewise structural equation models,nutrient concentrations had negative effect on ecosystem function directly or indirectly through altering biodiversity indices.Substrate index would have a positive effect on ecosystem function directly,and a posi-tive effect through the biodiversity indices indirectly.关键词
功能多样性/分类学多样性/功能摄食类群/冗余分析/分段结构方程模型Key words
functional diversity/taxonomic diversity/functional feeding group/redundancy analysis/piecewise structural equation model引用本文复制引用
燕文明,姚琦,蔡永久,黎明杰,高俊峰,李宽意,张又..基于大型底栖动物功能摄食类群的太湖流域河流生态系统功能特征[J].生态学杂志,2024,43(4):982-992,11.基金项目
水灾害防御全国重点实验室"一带一路"水与可持续发展科技基金项目(2021491711)、江苏水利科技项目(2022032,2022068)、中国科学院南京地理与湖泊研究所青年科学家小组项目(2021NIGLAS-CJH01)资助. （2021491711）
