Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13431 |
Grazing intensity significantly affects belowground carbon and nitrogen cycling in grassland ecosystems: a meta-analysis | |
Zhou, Guiyao1,2; Zhou, Xuhui1,3; He, Yanghui4; Shao, Junjiong1,3; Hu, Zhenhong4; Liu, Ruiqiang1; Zhou, Huimin1; Hosseinibai, Shahla5 | |
2017-03-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Australia |
英文摘要 | Livestock grazing activities potentially alter ecosystem carbon (C) and nitrogen (N) cycles in grassland ecosystems. Despite the fact that numerous individual studies and a few meta-analyses had been conducted, how grazing, especially its intensity, affects belowground C and N cycling in grasslands remains unclear. In this study, we performed a comprehensive meta-analysis of 115 published studies to examine the responses of 19 variables associated with belowground C and N cycling to livestock grazing in global grasslands. Our results showed that, on average, grazing significantly decreased belowground C and N pools in grassland ecosystems, with the largest decreases in microbial biomass C and N (21.62% and 24.40%, respectively). In contrast, belowground fluxes, including soil respiration, soil net N mineralization and soil N nitrification increased by 4.25%, 34.67% and 25.87%, respectively, in grazed grasslands compared to ungrazed ones. More importantly, grazing intensity significantly affected the magnitude (even direction) of changes in the majority of the assessed belowground C and N pools and fluxes, and C : N ratio as well as soil moisture. Specifically, light grazing contributed to soil C and N sequestration whereas moderate and heavy grazing significantly increased C and N losses. In addition, soil depth, livestock type and climatic conditions influenced the responses of selected variables to livestock grazing to some degree. Our findings highlight the importance of the effects of grazing intensity on belowground C and N cycling, which may need to be incorporated into regional and global models for predicting effects of human disturbance on global grasslands and assessing the climate-biosphere feedbacks. |
英文关键词 | carbon sequestration CO2 emission heavy grazing mineralization soil microbial biomass |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396829300018 |
WOS关键词 | SOIL CARBON ; INNER-MONGOLIA ; LIVESTOCK EXCLUSION ; SEMIARID RANGELAND ; TEMPERATE STEPPE ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; DESERT STEPPE ; RESPIRATION ; PLANT |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17748 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200062, Peoples R China; 2.Jiangsu Univ, Inst Agr Engn, Zhenjiang 212013, Jiangsu, Peoples R China; 3.East China Normal Univ, Ctr Global Change & Ecol Forecasting, Shanghai 200062, Peoples R China; 4.Fudan Univ, Coastal Ecosyst Res Stn Yangtze River Estuary, Key Lab Biodivers Sci & Ecol Engn, Minist Educ,Inst Biodivers Sci, 220 Handan Rd, Shanghai 200433, Peoples R China; 5.Univ Sunshine Coast, Fac Sci Hlth Educ & Engn, Maroochydore, Qld 4558, Australia |
推荐引用方式 GB/T 7714 | Zhou, Guiyao,Zhou, Xuhui,He, Yanghui,et al. Grazing intensity significantly affects belowground carbon and nitrogen cycling in grassland ecosystems: a meta-analysis[J]. GLOBAL CHANGE BIOLOGY,2017,23(3). |
APA | Zhou, Guiyao.,Zhou, Xuhui.,He, Yanghui.,Shao, Junjiong.,Hu, Zhenhong.,...&Hosseinibai, Shahla.(2017).Grazing intensity significantly affects belowground carbon and nitrogen cycling in grassland ecosystems: a meta-analysis.GLOBAL CHANGE BIOLOGY,23(3). |
MLA | Zhou, Guiyao,et al."Grazing intensity significantly affects belowground carbon and nitrogen cycling in grassland ecosystems: a meta-analysis".GLOBAL CHANGE BIOLOGY 23.3(2017). |
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