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Disturbance of plateau zokor-made mound stimulates plant community regeneration in the Qinghai-Tibetan Plateau, China |
XIANG Zeyu1, Arvind BHATT1, TANG Zhongbin1, PENG Yansong1, WU Weifeng1, ZHANG Jiaxin1, WANG Jingxuan1, David GALLACHER2, ZHOU Saixia1,*() |
1Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang 332900, China 2School of Life and Environmental Sciences, The University of Sydney, Narrabri NSW 2390, Australia |
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Abstract Mounds constructed by plateau zokors, which is widely distributed in alpine meadows significantly modified plant community structure. However, the variations of plant community structure under the disturbance of plateau zokor-made mound are less concerned. Therefore, we investigated the responses of plant community on zokor-made mound of different years (1 a and 3-4 a), and compared with undisturbed sites (no mound) in an alpine meadow in the eastern Qinghai-Tibetan Plateau (QTP), China. Species richness, coverage and Simpson diversity index were all significantly reduced by the presence of zokor-made mound, but plant heights were significantly increased, particularly in grasses and sedges. Several perennial forage species showed an increased importance value and niche breadth, including Koeleria macrantha, Elymus nutans and Poa pratensis. The effect of zokor-made mound on niche overlap showed that more intense interspecific competition produced a greater utilization of environmental resources. And this interspecific niche overlap was strengthened as succession progressed. The bare mound created by zokor burrowing activities provided a colonizing opportunity for non-dominant forage species, resulting in abundant plant species and plant diversity during the succession period. We concluded that presence of zokor-made mound was conducive to regeneration and vitality of plant community in alpine meadows, thus improving their resilience to anthropogenic stress.
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Received: 20 January 2021
Published: 10 October 2021
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Corresponding Authors:
*ZHOU Saixia (E-mail: zhousx@lsbg.cn)
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Cite this article:
XIANG Zeyu, Arvind BHATT, TANG Zhongbin, PENG Yansong, WU Weifeng, ZHANG Jiaxin, WANG Jingxuan, David GALLACHER, ZHOU Saixia. Disturbance of plateau zokor-made mound stimulates plant community regeneration in the Qinghai-Tibetan Plateau, China. Journal of Arid Land, 2021, 13(10): 1054-1070.
URL:
http://jal.xjegi.com/10.1007/s40333-021-0020-6 OR http://jal.xjegi.com/Y2021/V13/I10/1054
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