| 荒漠绿洲过渡带不同立地条件下物种多样性及其与土壤理化因子的关系 |
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| 引用本文： | 解婷婷,苏培玺,周紫鹃,李善家,张海娜.荒漠绿洲过渡带不同立地条件下物种多样性及其与土壤理化因子的关系[J].中国沙漠,2013,33(2):508-514. |
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| 作者姓名： | 解婷婷 苏培玺 周紫鹃 李善家 张海娜 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站,甘肃兰州730000;中国科学院寒区旱区环境与工程研究所内陆河流域生态水文重点实验室,甘肃兰州730000
2. 中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站,甘肃兰州730000;中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室,甘肃兰州730000 |
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| 摘 要： | 通过于2007-2011年对甘肃河西走廊中部荒漠绿洲过渡带不同立地条件下植被样方的凋查,应用Margalef丰富度指数、Pielou均匀度指数、Shannon-Weincr指数和Simpson指数研究了不同立地条件下物种多样性的变化,并采用典范对应分析方法(CCA)研究植物物种分布与土壤环境因子的关系.结果表明:荒漠绿洲过渡带丘间低地的植被盖度和Margalef、Simpson、Shannon-Wiener、Pielou指数值均最大,流动沙丘条件下最小；Hill多样性指数排序结果显示,随着土壤水分条件的变差,物种多样性同样表现出降低的趋势.按多样性从高到低的顺序,其相应的立地条件分别为丘间低地、缓平沙坡、固定沙丘、半固定沙丘和流动沙丘.选取的土壤因子对过渡带植被分布的影响程度大小为土壤含水量＞pH值＞全钾＞有机质＞速效氮＞全氮＞速效钾＞全磷＞土壤盐分＞速效磷.土壤含水量和pH是荒漠绿洲过渡带植被分布空间差异的最主要影响因子,前3个轴的环境解释率为98％,证明排序可信.
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| 关 键 词： | 荒漠绿洲过渡带 物种多样性 土壤因子 典范对应分析 |
Species Diversity and Its Relationship with Soil Factor under Different Site Conditions in Desert-oasis Ecotone |
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| XIE Ting-ting,SU Pei-xi,ZHOU Zi-juan,LI Shan-jia,ZHANG Hai-na,.Species Diversity and Its Relationship with Soil Factor under Different Site Conditions in Desert-oasis Ecotone[J].Journal of Desert Research,2013,33(2):508-514. |
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| Authors: | XIE Ting-ting SU Pei-xi ZHOU Zi-juan LI Shan-jia ZHANG Hai-na |
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| Abstract: | Vegatation and soil surverys were conducted under different site conditions in 2007-2011 to study species diversity using richness indices, evenness indices and diversity indices, in the middle reaches of Heihe River Basin, meanwhile the relationship between species distribution and soil enviromental factors was also studied by the canonical correspondence analysis. The results showed that the vegetation covers and species diversity were the highest in the interdune lowland, they were the lowest in the mobile dune; the result of the Hills index (diversity ordering) showed the species diversity reduced along with soil water content decreasing, the orders of species diversity was interdune lowland, flat slope, fixed dune, semifixed dune and mobile dune. The degree of influences of soil factors on vegetation distribution was soil water content>pH>total K>organic matter>available N>total N>available K>total P>saline content>available P, soil water content and pH were important factors significantly affecting spatial distribution difference of vegetation, the explanation of environmental was 98%, proof sorting credible. |
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| Keywords: | desert-oasis ecotone species diversity soil factor canonical correspondence analysis |
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