生态学杂志2018，Vol.37Issue(3)：651-660,10.DOI:10.13292/j.1000-4890.201803.034
梯级水库群水体碳、硫元素循环及耦合效应——以嘉陵江为例
The cycle and coupling effect of carbon and sulfur in cascade reservoirs: A case study of Jialing River
摘要
Abstract
Damming on the rivers has important effects on biogeochemical cycles of carbon,nitrogen and sulfur.To clarify the responses of C and S elements under the influence of cascade reservoirs,four representative cascade reservoirs in Jialing River were selected as the research objects.Samples of inflow,outflow,and stratified water in four cascade reservoirs were collected in winter (January) and summer (July) of 2016.Dissolved inorganic carbon (DIC) concentration,SO42-concentration and isotopic compositions of δ13CDIC and δ345 were analyzed.The results showed that:(1) Water chemistry was mainly controlled by carbonic acid balance.At the same time,H2SO4,derived from pyrite and atmospheric SO2 oxidation,was widely involved in regional carbonate weathering;(2) DIC was mainly affected by soil CO2 and carbonate.SO42-was mainly controlled by precipitation and pyrite oxidation process;(3) Significant correlations (P＜0.05) existed among paired characters of reservoir water DIC concentration,SO42-concentration,δ34S value and δ13CDIC value,indicating that the spatial and temporal dynamics of C and S elements in reservoir were affected by similar processes (physical,chemical,and biological).After intercepting of the dam,the river water environment and nutrient cycle had undergone great changes.The use of C and S double isotopes can effectively track the limnetic evolution of reservoirs.关键词
梯级水库/DIC同位素组成/SO42-同位素组成/C-S耦合Key words
cascade reservoir/isotopic composition of DIC/isotopic composition of SO42-/C and S coupling引用本文复制引用
杨梦迪,崔高仰,李亲凯,黄俊,李斯奇,张俊,陶月乐,李晓东..梯级水库群水体碳、硫元素循环及耦合效应——以嘉陵江为例[J].生态学杂志,2018,37(3):651-660,10.基金项目
国家重点研发计划项目(2016YFA0601000)和国家自然科学基金项目(41373136)资助. （2016YFA0601000）
