Arid
DOI10.1016/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
ISSN0167-8809
EISSN1873-2305
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
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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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