水生态学杂志2024，Vol.45Issue(3)：32-44,13.DOI:10.15928/j.1674-3075.202404010104
次生盐化对溪流底栖分解者和凋落物分解的影响
Effects of Secondary Salinization on Benthic Decomposers and Litter Decomposition in Streams
摘要
Abstract
Secondary salinization is a phenomenon of abnormal increase of fresh water sality that is caused by a multitude of human activities,including the use of road de-icing salt,mining and other forms of resource development,agricultural activities,urbanization,domestic sewage and industrial wastewater discharge,and so forth.Currently,secondary salinization has evolved from a local envi-ronmental issue in arid regions to a global ecological concern,posing a significant threat to the biodi-versity,ecosystem functions,and ecosystem services of freshwater ecosystems.In this study,we sum-mazied the influence of secondary salinization on the stream decomposer communities and litter de-composition processes based on 20 related literatures from home and abroad,focusing on the struc-ture and function of the decomposer subsystem.The benthic decomposer subsystem is mainly com-posed of exogenous litter,benthic animals,microorganisms and inorganic environment,which regu-lates the key function of the stream ecosystem,namely the litter decomposition process.It aimed to provide a theoretical foundation for the protection,management,and restoration of river and stream ecosystems.Results are as follows:(1)The response patterns of bacterial and fungal communities to the salinization process were significantly different,and the contribution of corresponding paths to lit-ter decomposition was also different in salinized streams.The fungal response is more complex.(2)Salinization can significantly affect benthic macroinvertebrates with lethal and sublethal effects.Shred-ders are typically sensitive to salinity,and the effects of changes in benthic shredders under saliniza-tion on the decomposition process of litter are significant.(3)The decomposition rates of litter gener-ally decrease in salinized streams.However,the relationship between the decomposition process of lit-ter and the characteristics and patterns of water salinization has not yet been determined.Future re-search should prioritize investigating the ecological effects of temporal and spatial dynamics of stream salinization,the monitoring of process parameters such as element release dynamics of litter decomposition,and the potential interaction between stream secondary salinization and other factors such as global change,eutrophication,and emerging pollutants.关键词
次生盐化/溪流/凋落物/分解/微生物群落/底栖动物Key words
secondary salinization/stream/litter/decomposition/microbial community/macroinver-tebrate分类
生物科学引用本文复制引用
盖鹤,朱文文,张敏,刘雨馨,李昆..次生盐化对溪流底栖分解者和凋落物分解的影响[J].水生态学杂志,2024,45(3):32-44,13.基金项目
国家重点研发计划项目(2019YFD0900605) （2019YFD0900605）
丽水市紧水滩、乌溪江、千峡湖三大水库洁水渔业研究项目(浙大采招2019 341号). （浙大采招2019 341号）
