生态学杂志2018，Vol.37Issue(3)：661-666,6.DOI:10.13292/j.1000-4890.201803.028
河道型水库溶解无机碳同位素组成特征与来源——以万安水库为例
Characters and sources of dissolved inorganic carbon isotope in channel reservoir: A case of Wanan Reservoir
摘要
Abstract
In this study,Wanan Reservoir was investigated with four seasonal samplings from September 2014 to June 2015,to understand the characters and sources of dissolved inorganic carbon (DIC) and its carbon isotope (δ13CDIc).Nine sampling sites covering the reservoir were included in the field survey.Results showed that the concentration of DIC in water was lower in summer and autumn than that in other seasons.The value of δ13CDIC was more positive in winter and spring.From upstream to downstream,DIC concentration showed a decrease trend,while δ13CDIC become more positive gradually.Photosynthesis and organic matter decomposition played important roles in controlling the variation of δ13CDIC in the surface water.Along the water column in the central reservoir,in situ parameters such as water temperature had no significant difference,indicating a weak thermal stratification in reservoir.However,DIC concentrations had an increase trend downwardly,while δ13CDIC gradually become more negative from surface water to deep water.Based on mass-balance calculation,about 57％ of DIC derived from soil CO2 at the reservoir entrance,while this value was 49％ at the site of reservoir discharge.This result means that river damming could change the weathering information contained in the chemical composition of river water.关键词
万安水库/溶解无机碳/无机碳同位素Key words
Wanan Reservoir/dissolved inorganic carbon/δ13CDIC引用本文复制引用
程天雨,周涛,秦勇,Waiwai Phoye,汪福顺..河道型水库溶解无机碳同位素组成特征与来源——以万安水库为例[J].生态学杂志,2018,37(3):661-666,6.基金项目
国家重点研发计划项目(2016YFA0601003)、国家自然科学基金项目(41573064、41273128)资助. （2016YFA0601003）
