湖泊科学2024，Vol.36Issue(5)：1493-1505,中插19-中插20,15.DOI:10.18307/2024.0535
亚热带高山溪流底栖动物多维度alpha多样性及其驱动因子
Multidimensional alpha diversities of benthic macroinvertebrate in subtropical high-moun-tain streams and their driving factors
摘要
Abstract
High-altitude stream ecosystems are sensitive to environment disturbance,and thusare considered as excellent indicators of environmental changes and human disturbance.This study focused on the Tianquan River,a representative subtropical high-mountain stream situated at Tianquan County,Sichuan Province.Surveys were carried out at 20 sampling sites along the upper rea-ches of the Tianquan River in April and October 2018.The aim of this study was to explore the spatio-temporal patterns and driving processes of taxonomic,functional and phylogenetic alpha diversity of benthic macroinvertebrates in the undisturbed high-mountain streams.Specifically,it sought to identify the key environmental and spatial factors influencing diversity,along with the relative contributions of the two sets of explanatory variables.Distance-based linear models analysis showed that significant environmental factors affecting taxonomic diversities were altitude and velocity,whereas the significant spatial factors were PCNM 4-6 based on o-verland distance.The functional diversity indices responded significantly to substrate type and turbidity(environmental factors),and overland distance-based PCNM 6-8 and watercourse distance-based PCNM 3(spatial factors).Only environmental factors(altitude and substrate type)significantly influenced phylogenetic diversity indices.Variation partitioning analysis indicated that the pure contributions of environmental factors(0.6％-21.5％)and spatial factors(0.2％-16.6％)accounted for similar amounts of variation in taxonomic and functional diversity indices,highlighting the significant roles of both sets of factors.The variation in phylogenetic diversity were better explained by environmental factors(12.1％-23.3％)than that explained by spatial factors(0-6.9％),highlighting the dominant role of environmental factors.This study unveiled the diversity patterns and driving mechanisms of macroinvertebrates in the upper reaches of the Tianquan River,offering crucial theoretical groundwork for comprehending the di-versity status,management,and conservation of subtropical high-mountain stream ecosystems.关键词
底栖动物/集合群落/物种多样性/系统发育多样性/功能多样性/天全河Key words
Macroinvertebrates/metacommunity theory/taxonomic diversity/phylogenetic diversity/functional diversity/Tianquan River引用本文复制引用
魏晨辉,蒋小明,李红涛,陶敏,孔令茜,蔡瑶..亚热带高山溪流底栖动物多维度alpha多样性及其驱动因子[J].湖泊科学,2024,36(5):1493-1505,中插19-中插20,15.基金项目
雅康高速公路工程对天全河珍稀鱼类省级自然保护区影响及水生生态监测项目(5118012017000513)和国家自然科学基金项目(32371744)联合资助. （5118012017000513）
