Influence of edaphic factors on plant distribution and diversity in the arid area of Xinjiang, Northwest China
Influence of edaphic factors on plant distribution and diversity in the arid area of Xinjiang, Northwest China
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新疆干旱区土壤因子对植物分布及多样性的影响
DOI：
10.1080/15324982.2017.1376004
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发表时间：
2018
影响因子：
1.4
通讯作者：
Yang Jian Jun
中科院分区：
文献类型：
--
作者：
Zhang Xue Ni;Yang Xiao Dong;Li Yan;He Xue Min;Lv Guang Hui;Yang Jian Jun
土壤因子对植物分布的影响是干旱区植被恢复和管理中的重要问题。本研究对艾比湖湿地自然保护区荒漠植物的分布、多样性以及土壤水分、盐分和养分进行了测定。我们确定了植物分布和土壤因子之间的关系，沿着一个样带与河流的距离增加，并创建了最佳模型，使用土壤因子来解释植物多样性的变化。在一般情况下，土壤因素减少与河流的距离增加。土壤体积含水量、电导率、pH值、氮、磷、硫含量与植物分布密切相关。典范对应分析结果表明，样带内沿着植物可分为耐盐碱、耐旱和高磷需求3类。SVWC、pH、土壤有机碳（C）、N、P和S等因子可解释ELWNR植物多样性变异的93.8%。与其他土壤因子相比，在广义加性模型中，当考虑单个土壤变量时，S解释多样性变异的百分比最大（R2 = 38.9%）。我们的研究结果表明，土壤pH值，P，N和S的增加将显着提高植物多样性。结果表明，不同物种对生境的偏好存在差异，N、S含量对植物多样性有显著的正向影响，为荒漠生态系统植物恢复和盐渍土修复提供了科学依据。
ABSTRACT The influence of edaphic factors on plant distribution is essential to community ecology and important for vegetation restoration and management in arid ecosystems. In this study, desert plant distribution and diversity as well as soil water, salinity, and nutrients were measured in the Ebinur Lake Wetland Nature Reserve (ELWNR) in arid Northwest China. We determined relationships between plant distribution and soil factors along a transect with increasing distance from the river and created optimal models using soil factors to explain variations in plant diversity. In general, soil factors decreased with increasing distance from the river. Soil volumetric water content (SVWC), electrical conductivity (EC), pH, nitrogen (N), phosphorus (P), and sulfur (S) were closely related to plant distribution. According to canonical correspondence analysis, plants along the transect were divided into three groups: saline–alkaline tolerant, drought tolerant, and high P-demanding. SVWC, pH, soil organic carbon (C), N, P, and S account for 93.8% of the variations in plant diversity in the ELWNR. Compared with other soil factors, S explained the largest percentage of variations in diversity when single soil variables were considered in generalized additive models (R2 = 38.9%). Our results suggest increases in soil pH, P, N, and S would improve plant diversity significantly. We found differences among species groups in preference for habitat, and N and S content had a significant positive effect of on plant diversity, providing a scientific reference for plant restoration and saline soil remediation in desert ecosystems.