干旱区生态环境知识资源中心(Arid): Waves of desertification in a competitive ecosystem

Arid

DOI	10.1016/j.ecolmodel.2019.01.018
	Waves of desertification in a competitive ecosystem
	Daza C, Y. C.1,2; Laguna, M. F.1,2; Monjeau, J. A.4,5,6; Abramson, G.1,2,3
通讯作者	Daza C, Y. C.
来源期刊	ECOLOGICAL MODELLING
ISSN	0304-3800
EISSN	1872-7026
出版年	2019
卷号	396 页码:42-49
英文摘要	We study a mathematical model inspired by a common scenario in northern Patagonia consisting of humans and their livestock living together with native wildlife. The main production system in this area is sheep farming, which due to wrong historical management has led to desertification of the habitat, with impact on both native wildlife and livestock. Particularly the largest native herbivore, the guanaco, has reflected in their numbers this alteration induced in the environment. We analyze a mathematical model that captures the main characteristics of the interaction between sheep and guanaco: the hierarchical competition and the advantage granted by humans to the herds, and also incorporates a dynamic for the habitat. Using the metapopulation formalism, the trophic web of two herbivores is extended over a patchy landscape that considers two characteristic times for the dynamics of the resource. Our study stresses the dependence of the metapopulations dynamics on the recovery time of the resource. These results are backed up by a deterministic mean field model which shares some similarities with the stochastic and spatially extended one. We find different regimes depending on the parameters considered: coexistence of both species, survival of a single species and extinction of the other, and extinction of both. Remarkably, in some regions of parameters space we detect the presence of periodical spatiotemporal patterns, with persistent oscillations of constant amplitude. Based on these results, we perform a characterization of the observed scenarios in order to gain insight about the system.
英文关键词	Livestock-wildlife coexistence Hierarchical competition Habitat destruction Desertification Metapopulations Mathematical modelling
类型	Article
语种	英语
国家	Argentina ; Brazil
开放获取类型	Green Submitted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000459951700005
WOS关键词	RANGELANDS ; LIVESTOCK ; GUANACOS ; MODEL
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215225
作者单位	1.CNEA, Ctr Atom Bariloche, Av E Bustillo 9500,R8402AGP, San Carlos De Bariloche, Rio Negro, Argentina; 2.Consejo Nacl Invest Cient & Tecn, Av E Bustillo 9500,R8402AGP, San Carlos De Bariloche, Rio Negro, Argentina; 3.Inst Balseiro, R8402AGP, San Carlos De Bariloche, Rio Negro, Argentina; 4.Fdn Bariloche, R8402AGP, San Carlos De Bariloche, Rio Negro, Argentina; 5.Consejo Nacl Invest Cient & Tecn, R8402AGP, San Carlos De Bariloche, Rio Negro, Argentina; 6.Univ Fed Rio de Janeiro, Dept Ecol, Lab Ecol & Conservacao Populacoes, Rio De Janeiro, Brazil
推荐引用方式 GB/T 7714	Daza C, Y. C.,Laguna, M. F.,Monjeau, J. A.,et al. Waves of desertification in a competitive ecosystem[J],2019,396:42-49.
APA	Daza C, Y. C.,Laguna, M. F.,Monjeau, J. A.,&Abramson, G..(2019).Waves of desertification in a competitive ecosystem.ECOLOGICAL MODELLING,396,42-49.
MLA	Daza C, Y. C.,et al."Waves of desertification in a competitive ecosystem".ECOLOGICAL MODELLING 396(2019):42-49.