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Livestock grazing impacts on plateau pika (Ochotona curzoniae) vary by species identity

文献类型： 外文期刊

作者： Li, Xincheng 1 ; Wang, Zhongnan 1 ; Wang, Deli 1 ; Wang, Ling 1 ; Pan, Duofeng 1 ; Li, Jie 1 ; De, Kejia 4 ; Seastedt, Ti 1 ;

作者机构： 1.Northeast Normal Univ, Inst Grassland Sci, Sch Environm, Changchun 130024, Jilin, Peoples R China

2.Northeast Normal Univ, Key Lab Vegetat Ecol, Key Lab Wetland Ecol & Vegetat Restorat, Changchun 130024, Jilin, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Forage & Grassland Sci, Harbin 150086, Heilongjiang, Peoples R China

4.Qinghai Univ, Qinghai Acad Anim Sci & Vet Med, Xining 810016, Qinghai, Peoples R China

5.Univ Colorado, Inst Arctic & Alpine Res, Dept Ecol & Evolutionary Biol, Boulder, CO 80309 USA

关键词： Alpine meadow; Grassland management; Indirect effect; Large herbivore; Sanjiangyuan; Source of the Three Rivers

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN： 0167-8809

年卷期： 2019 年 275 卷

页码：

收录情况： SCI

摘要： Livestock and small burrowing mammals are potential ecosystem engineers and major drivers of ecosystem processes. Small mammals, often considered competitors with livestock, have been reported to increase in recent years and have been identified for their negative impacts on ecosystem services such as plant production and soil carbon sequestration. However, these increases and impacts by small mammals have rarely been studied with respect to how they may be influenced by livestock grazing. Here we experimentally manipulated large enclosures on the alpine grassland of Qinghai-Tibetan plateau, each with different livestock assemblages: yak (Bos grunniens), Tibetan sheep (Ovis aries), mixed populations of yak and sheep, and a control plot containing no livestock to study the potential impacts of livestock on the dominant small mammalian herbivore in the region, the plateau pikas (Ochotona curzoniae). We found that during the period of peak vegetative growth all pika populations in livestock experimental plots increased compared with those in the control plots. Additionally, pika populations and active pika burrow density increased more in experimental plots containing yaks compared with the sheep-only experimental plots. These results provide evidence that livestock grazing can increase the risk of pika outbreaks, which has led to this species being classified as a pest and subject to widespread control measures. We suggest explicitly incorporating livestock species identity in addition to grazing intensity and duration into management considerations to ensure maintenance of native biodiversity and long-term sustain ability on the alpine grasslands of the Qinghai-Tibetan plateau.

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