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人工补水对黄河三角洲淡水湿地新陈代谢的影响

发表时间:2011-12-31  浏览量:1722  下载量:687
全部作者: 沈小梅,孙涛,刘方方,徐静
作者单位: 北京师范大学环境学院
摘 要: 针对人工补水对湿地恢复的重要作用,利用开放水体溶氧曲线法及夜晚回归法,分析了人工补水对黄河三角洲淡水湿地新陈代谢的影响。研究结果表明:淡水湿地水体新陈代谢对淡水输入响应时间滞后约9~10 d. 补水开始后,33.33 km2淡水湿地水体初级生产力(gross primary productivity,GPP)、生态系统呼吸(ecosystem respiration,ER)及净生产力(net primary productivity,NEP)均呈显著减少的趋势,不同类型湿地水体NEP均由正值变为负值,人工补水使得河口淡水湿地呈现显著自养向异养转变。
关 键 词: 环境生态学;湿地;人工补水;新陈代谢;溶解氧;黄河三角洲
Title: Effects of artificial water supplement on freshwater wetland metabolism in the Yellow River Delta
Author: SHEN Xiaomei, SUN Tao, LIU Fangfang, XU Jing
Organization: School of Environment, Beijing Normal University
Abstract: The artificial water supplement is a significant approach to wetland restorations. In this paper, the effects of artificial water supplement on water metabolism in the Yellow River Delta wetlands was investigated using the open-water dissolved oxygen curve method and the night-time regression method. The results showed that the response time of water metabolism on freshwater inflow variations lagged about 9~10 days. During the artificial water supplement processes, gross primary productivity (GPP), ecosystem respiration (ER) and net primary productivity (NEP) showed a significant reduction in the “fifty thousand acres” wetland. NEP changed from positive to negative in different types of wetland. Artificial water supplement made estuaries freshwater wetland change from autotrophic to heterotrophic significantly.
Key words: environmental ecology; wetland; artificial water supplement; metabolism; dissolved oxygen; Yellow River Delta
发表期数: 2011年12月第24期
引用格式: 沈小梅,孙涛,刘方方,等. 人工补水对黄河三角洲淡水湿地新陈代谢的影响[J]. 中国科技论文在线精品论文,2011,4(24):2253-2258.
 
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