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题名: Effects of plant diversity on soil erosion for different vegetation patterns
作者: Hou, Jian; Wang, Huiqing; Fu, Bojie; Zhu, Linhai; Wang, Yafeng; Li, Zongshang
刊名: CATENA
出版日期: 2016-12
卷号: 147, 页码:632-637
关键词: Soil Cs-137 ; Vegetation coverage ; Vegetation pattern ; Plant distribution
DOI: 10.1016/j.catena.2016.08.019
部门归属: 城市与区域生态国家重点实验室
英文摘要: Vegetation effectively prevents soil erosion. However the relationship between plant diversity and soil erosion remains ambiguous under various environmental conditions. To explore the role that plant diversity plays in soil erosion, this study was conducted in the Three-River-Source region, located in the hinterlands of the Qinghai-Tibet Plateau, China. After examining 99 plots within the study area, and analyzing the soil Cs-137 inventory within the plots, we found that with a greater number of plants distributed within an aggregation pattern, there was greater interception of the soil particles by the vegetation patch. This phenomenon results in a more developed vegetation patch that can support greater vegetation coverage and higher plant diversity than it previously could.. Although a positive correlation exists between plant diversity and vegetation coverage, the relationship between the extent of soil erosion and plant diversity is modulated by the vegetation pattern. When plants are distributed in a relatively homogeneous pattern, vegetation coverage decreases with increasing plant diversity, which leads to increased soil erosion. When plants are, distributed between a homogenous and a heterogeneous pattern, no relationship is found between plant diversity and soil erosion. With a heterogeneous plant distribution, vegetation coverage increases with plant diversity, and soil erosion is inhibited under such conditions. (C) 2016 Elsevier B.V. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35573
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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