OALib Journal期刊
ISSN: 2333-9721
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塔里木河中下游荒漠河岸林植被对地下水埋深变化的响应
DOI: 10.11821/xb200811001, PP. 1123-1130
Keywords: 地下水埋深,物种多样性,高斯回归模型,塔里木河中下游
Abstract:
结合塔里木河中下游74个植被样地和74眼地下水位监测井(2005-2007年)数据,将地下水位按不同埋深划分为0~2m,2~4m,4~6m,6~8m,8~10m和>10m6个梯度,对不同地下水埋深下的群落盖度、物种多样性进行了分析,并探讨了主要植物种分布频率与地下水埋深的关系。结果表明在地下水位2~4m时,物种多样性最高,其次为4~6m,再次为0~2m;当地下水位在6m以下时,物种多样性锐减。塔里木河中下游主要植物最适宜水位在2~4m之间;这些植物能够正常生长的地下水埋深区间为3~6m。这表明,塔里木河下游植被恢复的地下水位应确保达到6m以上。
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