Spatial distribution of shrubs and perennial plants under grazing disturbance in the desert steppe of Inner Mongolia

文献类型： 外文期刊

第一作者： Wang, Zihan

作者： Wang, Zihan;Meng, Pujia;Wang, Zhongwu;Lv, Shijie;Han, Guodong;Hou, Dongjie;Wang, Jing;Zhu, Aimin;Wang, Haiming

作者机构：

关键词： Stocking rate; Shrubs and perennial plants; Desert steppe; Geostatistics; Spatial distribution

期刊名称：GLOBAL ECOLOGY AND CONSERVATION （ 影响因子：3.4； 五年影响因子：4.3 ）

ISSN：

年卷期： 2024 年 54 卷

页码：

收录情况： SCI

摘要： The desert steppe is unique as a transition zone from the steppe to the desert of the Eurasian Steppe. The spatial distribution of shrubs and perennial plants has changed due to long-term disturbance caused by overgrazing in the ecosystem. This study aimed to determine the degree of patchiness of shrubs and perennial plants under grazing disturbance, which is of great significance to better understand the succession mechanism of plant community in the desert steppe. This study investigated the spatial distribution of shrubs and perennial plants under four stocking rates (no grazing, CK, 0 sheep center dot hm(-2)center dot half year(-1); light grazing, LG, 0.93 sheep center dot hm(-2)center dot half year(-1); moderate grazing, MG, 1.82 sheep center dot hm(-2)center dot half year(-1); heavy grazing, HG, 2.71 sheep center dot hm(-2)center dot half year(-1)) in the desert steppe of Inner Mongolia, primarily using geostatistical methods. The density of perennial grasses increased with increasing stocking rate, while its height decreased (except for HG). The density and height of the shrubs and the perennial forbs showed an exponential or gradual decline. The spatial distribution of shrubs and perennial plants is mainly affected by structural factors such as topography, soil parent material, and climate, and the density of shrubs and perennial plants is most sensitive to changes in stocking rate. An appropriate stocking rate increases the spatial heterogeneity of shrubs and perennial plants, but heavy grazing reduces the spatial heterogeneity of shrubs and perennial plants.

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