Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.agee.2014.08.011 |
Disentangling ecosystem responses to livestock grazing in drylands | |
Chillo, Veronica; Ojeda, Ricardo | |
通讯作者 | Chillo, Veronica |
来源期刊 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
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ISSN | 0167-8809 |
EISSN | 1873-2305 |
出版年 | 2014 |
卷号 | 197页码:271-277 |
英文摘要 | This study aims to analyze dryland dynamics under livestock production in an integrated manner, by considering several taxa, intrinsic variability in resource availability and variations in disturbance intensity and management. Resilience was assessed by quantifying functional redundancy and response diversity of vegetation, ants and small mammals in arid rangelands under continuous and rotational management strategies. The net effect of increasing grazing intensity on community resilience and the occurrence of structural (richness, diversity and composition) and functional (decomposition rate) threshold responses under the effects of seasonality and management were assessed. Results showed that grazing intensity negatively affected functional redundancy more than response diversity of all taxa and under both management strategies. Animal assemblages showed abrupt changes in richness and diversity, but vegetation showed a gradual change in structure along the grazing intensity gradient. Decomposition rate showed abrupt changes under both management strategies. Although overall community resilience decreased, not all assemblages presented a threshold response, probably due to different components of resilience affecting assemblages in different ways. These decreases caused structural threshold response within animal taxa but not on vegetation. The lack of thresholds in vegetation does not imply that a related ecosystem process is not affected (i.e., decomposition). Vegetation and animal assemblages, as well as functional and structural threshold responses, may not be strongly coupled in natural systems. (C) 2014 Elsevier B.V. All rights reserved. |
英文关键词 | Response diversity Functional redundancy Management strategies Resilience Seasonal variation Structural and functional thresholds Multi-taxa approach |
类型 | Article |
语种 | 英语 |
国家 | Argentina |
收录类别 | SCI-E |
WOS记录号 | WOS:000344423000027 |
WOS关键词 | FUNCTIONAL REDUNDANCY ; MONTE DESERT ; RESILIENCE ; DIVERSITY ; THRESHOLDS ; MANAGEMENT ; DESERTIFICATION ; STABILITY ; GRADIENTS ; STATE |
WOS类目 | Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences |
WOS研究方向 | Agriculture ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/180541 |
作者单位 | Consejo Nacl Invest Cient & Tecn, CCT Mendoza, Biodivers Res Grp, Inst Argentino Invest Zonas Aridas IADIZA, Mendoza, Argentina |
推荐引用方式 GB/T 7714 | Chillo, Veronica,Ojeda, Ricardo. Disentangling ecosystem responses to livestock grazing in drylands[J],2014,197:271-277. |
APA | Chillo, Veronica,&Ojeda, Ricardo.(2014).Disentangling ecosystem responses to livestock grazing in drylands.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,197,271-277. |
MLA | Chillo, Veronica,et al."Disentangling ecosystem responses to livestock grazing in drylands".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 197(2014):271-277. |
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