Grazer effects on soil carbon storage vary by herbivore assemblage in a semi-arid grassland
文献类型： 外文期刊
作者： Chang, Qing 1 ; Wang, Ling 1 ; Ding, Shiwen 1 ; Xu, Tongtong 1 ; Li, Zhiqiang 1 ; Song, Xuxin 1 ; Zhao, Xuan 1 ; Wang, De 1 ;
作者机构： 1.Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China
2.Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China
3.Heilongjiang Acad Agr Sci, Inst Forage & Grassland Sci, Harbin, Heilongjiang, Peoples R China
关键词： carbon cycle; carbon storage; foraging behaviour; grassland management; livestock grazing; plant diversity; plant-herbivore interactions; soil organic carbon
期刊名称：JOURNAL OF APPLIED ECOLOGY （ 影响因子：6.528； 五年影响因子：7.266 ）
ISSN： 0021-8901
年卷期： 2018 年 55 卷 5 期
页码：
收录情况： SCI
摘要： 1. Accounting for 10%-30% of global soil organic carbon, grassland soils potentially present a large reservoir for storing atmospheric CO2. Livestock grazing management can substantially affect grassland soil carbon (C) storage, but few controlled experiments have explored how herbivore assemblages (different herbivore species and combinations) affect soil C storage. 2. We examined effects of moderate grazing by different herbivore assemblages (no grazing; sheep grazing; cattle grazing; mixed grazing by sheep and cattle) on soil organic carbon storage in two types of grassland communities (high forbs/high diversity and low forbs/low diversity), within a semi-arid grassland with a 5-year grazing history. 3. We found that herbivore assemblage generated varying effects on soil C storage and the effects were subject to grassland community types. In the low diversity community, none of three herbivore assemblages studied had obvious effects on soil C storage. In the high diversity community, however, sheep grazing significantly decreased soil C storage due to high selectivity for high quality forbs, and cattle grazing had no effects on soil C storage, while mixed grazing by sheep and cattle significantly increased soil C storage. Overall, soil C storage was highest in mixed-grazed grassland sites with high diversity.
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