%0 Journal Article
%T Effect of water table to niche of plant population at Minqin oasis fringe<br>民勤绿洲边缘地下水位变化对植物种群生态位的影响
%A YANG Zi-Hui
%A FANG E-Tian
%A LIU Hu-Jun
%A LI Ai-De
%A XU Xian-Ying
%A <br>杨自辉
%A 方峨天
%A 刘虎俊
%A 李爱德
%A 徐先英
%J 生态学报
%D 2007
%I 
%X At Minqin oasis fringe,effects of descending water table to niche of plant population was studied using spatial difference of water table(8-12 m in Huqu region,15-17 m in Quanshan and 20-23m in Baqu) and the descending grades of water table during 1984 to 1992(7.45-11.65 meter) in Sha-jin-zi.The result reveals:with the descending of underground water in different regions,the breadth of niche of plant population decreases,and the population degenerates;with the descending of water table in time grade,Nitraria tangutorum population extends,while the others decrease.Nitraria tangutorum,with the widest breadth of niche among the desert plant communities at Minqin oasis fringe,is the dominant species in this region.Nitraria tangutorum population generally extends at a water table ranging from 7.45 m to 11.65 m,so the critical water table for improving eco-environment of Minqin oasis should be within this scope.
%K fringe of Minqin oasis
%K niche of population
%K grads of water table<br>民勤绿洲边缘
%K 种群生态位
%K 地下水位梯度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=ED30BEDFE0A056C1CF8C8858E507CB65&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=708DD6B15D2464E8&sid=F1056609C31FBE60&eid=4E654D56F27979DC3D1C76EEC51D0361&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=33