Arid
DOI10.1016/j.jtbi.2017.10.001
Nonlocal grazing in patterned ecosystems
Siero, E.
通讯作者Siero, E.
来源期刊JOURNAL OF THEORETICAL BIOLOGY
ISSN0022-5193
EISSN1095-8541
出版年2018
卷号436页码:64-71
英文摘要

Many ecosystems exhibit gapped, labyrinthine, striped or spotted patterns. Important examples are vegetation patterns in drylands: these patterns are viewed as precursors of a catastrophic transition to a degraded state. A possible source of degradation is overgrazing, but many current spatially extended models include grazing in a local linear way. In this article nonlocal grazing responses are derived, taking into account (1) how many consumers there are (demographic response) (2) where they are (aggregative response) and (3) how much they forage (functional response). Different assumptions lead to different grazing responses, the type of grazing has a large influence on how ecosystems adapt to changing environmental conditions. In dryland simulations the different types of grazing are shown to alter the desertification process driven by decreasing rainfall. A sufficiently strong aggregative response leads to the suppression of vegetation patterns, nuancing their role as generic early warning signals. (C) 2017 Elsevier Ltd. All rights reserved.


英文关键词Spatial modelling Functional, demographic and aggregative response Overgrazing Land degradation Desertification Partial integro-differentiai equation
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000415662800007
WOS关键词VEGETATION PATTERNS ; BANDED VEGETATION ; SPATIAL-PATTERNS ; MOVEMENT ; PATCHINESS ; MECHANISMS ; GRADIENT ; DENSITY ; MODELS
WOS类目Biology ; Mathematical & Computational Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Mathematical & Computational Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211385
作者单位Westfalische Wilhelms Univ Munster, Inst Numer & Angew Math, Einsteinstr 62, D-48149 Munster, Germany
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Siero, E.. Nonlocal grazing in patterned ecosystems[J],2018,436:64-71.
APA Siero, E..(2018).Nonlocal grazing in patterned ecosystems.JOURNAL OF THEORETICAL BIOLOGY,436,64-71.
MLA Siero, E.."Nonlocal grazing in patterned ecosystems".JOURNAL OF THEORETICAL BIOLOGY 436(2018):64-71.
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