生态学报2017，Vol.37Issue(14)：4663-4670,8.DOI:10.5846/stxb201603310588
筑坝河流磷素的迁移转化及其富营养化特征
Phosphorus cycling and the associated ecological effects of eutrophication in dam-regulated rivers
摘要
Abstract
The anthropogenic input of nutrients to rivers is the main cause of eutrophication,and both the excessive control and engineering of river channels further complicate the issue.To meet the demand for energy and water resources,thousands of dams,weirs,and sluices have been constructed and affected almost every river,which deeply interferes with the biogeochemistry cycles of nutrients and the ecological function of river systems.Previous research has investigated the ecological effects of eutrophication caused by phosphorus in dammed rivers,since phosphorus limitation of primary production is more predominant in river systems.Dammed rivers can reduce outflow and,hence,sequester a significant amount of phosphorus within the impoundments.As a consequence,river water becomes eutrophic,and the ratios of main nutrients change drastically,owing to the different responses of the nutrients to retention by dams.In addition,sediments in the dammed rivers,which containing high contents of phosphorus,can easily become a potential pollution source,especially under intensive scouring events.At the same time,the abundance of algae communities increases,as certain species bloom in the water column,which aggravates the ecologic effects of river eutrophication and threatens the biodiversity of river systems.Therefore,researchers have found that an efficient management strategy based on annual rainfall storage and dam discharge control can be used to improve the ecological effects of eutrophication in dammed rivers.However,as anthropogenic impacts continue to increase,further studies of dammed rivers are needed to clarify the relationship between artificial control in rivers and river eutrophication,in order to reduce the ecological effects of eutrophication,as well as to quantify the threshold of phosphorus,in order to further understand the eutrophication mechanisms of dammed rivers and the combined effects of nitrogen and carbon,to manage phosphorus within sediments,in order to prevent its release and resuspension,and to address concerns regarding the construction and restoration of landscape rivers with dams throughout China.关键词
筑坝河流/磷滞留/富营养化/沉积物/闸坝泄流Key words
dammed rivers/phosphorus retention/eutrophication/sediment/reservoir discharge引用本文复制引用
鲍林林,李叙勇,苏静君..筑坝河流磷素的迁移转化及其富营养化特征[J].生态学报,2017,37(14):4663-4670,8.基金项目
京津冀城市群地区生态安全关键技术综合示范区建设(2016YFC0503007) （2016YFC0503007）
国家水体污染控制与治理科技重大专项(2015ZX07203-005) （2015ZX07203-005）
中国科学院重点部署项目(KZZD-EW-10-02) （KZZD-EW-10-02）
国家自然科学基金青年基金(41401590) （41401590）
