Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14841 |
Grazing simplifies soil micro-food webs and decouples their relationships with ecosystem functions in grasslands | |
Wang, Bing1,2; Wu, Liji3; Chen, Dima4; Wu, Ying5; Hu, Shuijin6; Li, Linghao1,2; Bai, Yongfei1,2 | |
2019-10-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Livestock grazing often alters aboveground and belowground communities of grasslands and their mediated carbon (C) and nitrogen (N) cycling processes at the local scale. Yet, few have examined whether grazing-induced changes in soil food webs and their ecosystem functions can be extrapolated to a regional scale. We investigated how large herbivore grazing affects soil micro-food webs (microbes and nematodes) and ecosystem functions (soil C and N mineralization), using paired grazed and ungrazed plots at 10 locations across the Mongolian Plateau. Our results showed that grazing not only affected plant variables (e.g., biomass and C and N concentrations), but also altered soil substrates (e.g., C and N contents) and soil environment (e.g., soil pH and bulk density). Grazing had strong bottom-up effects on soil micro-food webs, leading to more pronounced decreases at higher trophic levels (nematodes) than at lower trophic levels (microbes). Structural equation modeling showed that changes in plant biomass and soil environment dominated grazing effects on microbes, while nematodes were mainly influenced by changes in plant biomass and soil C and N contents; the grazing effects, however, differed greatly among functional groups in the soil micro-food webs. Grazing reduced soil C and N mineralization rates via changes in plant biomass, soil C and N contents, and soil environment across grasslands on the Mongolian Plateau. Spearman's rank correlation analysis also showed that grazing reduced the correlations between functional groups in soil micro-food webs and then weakened the correlation between soil micro-food webs and soil C and N mineralization. These results suggest that changes in soil micro-food webs resulting from livestock grazing are poor predictors of soil C and N processes at regional scale, and that the relationships between soil food webs and ecosystem functions depend on spatial scales and land-use changes. |
英文关键词 | functional groups livestock grazing Mongolian Plateau soil carbon mineralization soil environment soil nitrogen mineralization soil substrates trophic levels |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488350800001 |
WOS关键词 | NITROGEN MINERALIZATION ; PLANT DIVERSITY ; INNER-MONGOLIA ; CARBON ; COMMUNITIES ; HERBIVORES ; INTENSITY ; NEMATODES ; RESPONSES ; NETWORKS |
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/187383 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Hohhot, Peoples R China; 4.China Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang, Peoples R China; 5.Yunnan Univ, Lab Ecol & Evolutionary Biol, Kunming, Yunnan, Peoples R China; 6.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC USA |
推荐引用方式 GB/T 7714 | Wang, Bing,Wu, Liji,Chen, Dima,et al. Grazing simplifies soil micro-food webs and decouples their relationships with ecosystem functions in grasslands[J]. GLOBAL CHANGE BIOLOGY,2019. |
APA | Wang, Bing.,Wu, Liji.,Chen, Dima.,Wu, Ying.,Hu, Shuijin.,...&Bai, Yongfei.(2019).Grazing simplifies soil micro-food webs and decouples their relationships with ecosystem functions in grasslands.GLOBAL CHANGE BIOLOGY. |
MLA | Wang, Bing,et al."Grazing simplifies soil micro-food webs and decouples their relationships with ecosystem functions in grasslands".GLOBAL CHANGE BIOLOGY (2019). |
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