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胡杨部分生态指标对塔里木河下游应急输水的响应
Authors
Bernd Cyffka
任伟
+3 more
柴政
玉米提·哈力克
艾里西尔·库尔班
Publication date
1 January 2009
Publisher
Abstract
向塔里木河下游应急生态输水对于胡杨为主体的荒漠河岸植被的恢复和自然更新产生了积极的影响。本文根据近5年对塔里木河下游阿拉干地区的大量野外调查数据,分析了应急输水对该地区地下水位上升及胡杨各项生态指标的影响。结果显示:随着应急生态输水的继续和扩大,塔河下游典型监测断面——阿拉干的地下水位逐渐抬升,水质得到改善,河道附近的地下水埋深已经由输水前的10~12m抬升至5.5~6.2m。胡杨的部分生态指标对输水有不同程度的响应;具体表现在,在垂直河道方向上,离河道越近胡杨各项生态指标,即盖度、郁闭度、冠幅、萌生枝、树冠疏失度以及次生苗和实生苗出现的频率等对输水的响应越显著。总体来说,在河道200m范围之内,生态输水对胡杨恢复的影响程度是显著的;在200~800m之间,为中度影响;800m以上的距离几乎无影响
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Last time updated on 29/11/2016