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OALib Journal期刊
ISSN: 2333-9721
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古尔班通古特沙漠生境对植物群落格局的影响
DOI: 10.11821/xb200406012, PP. 895-902
Keywords: 古尔班通古特沙漠,生境异质性,植被生态,影响
Abstract:
沿87o37'09"~88o24'04"E纵穿古尔班通古特沙漠，对44o14'04"~45o41'52"N的范围进行11个样地的地貌景观调查、植被分布参数采集和土壤取样。研究区统计到的植物种数占古尔班通古特沙漠文献资料中植物种数的1/3，出现的植物群落构建了该沙漠大面积成片分布的荒漠植被景观。调查发现，随着宏观生境的空间变化，植物群落作相应的演替。在此基础上，利用因子分析(PCA)和相关分析(CA)查明了沙漠风沙土理化属性，如土壤养分、盐分、水分、碱性(pH)等微生境的异质性仅对沙漠植被草本层片的多样性(PIE草)产生显著影响。同时，这些微生境因相互拮抗使沙漠环境处于暂时的脆弱平衡之中。
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