干旱区生态环境知识资源中心(Arid): Spiral vegetation patterns in high-altitude wetlands

Arid

DOI	10.1016/j.ecocom.2018.12.003
	Spiral vegetation patterns in high-altitude wetlands
	Fernandez-Oto, Cristian; Escaff, Daniel; Cisternas, Jaime
通讯作者	Fernandez-Oto, Cristian
来源期刊	ECOLOGICAL COMPLEXITY
ISSN	1476-945X
EISSN	1476-9840
出版年	2019
卷号	37 页码:38-46
英文摘要	When plant communities suffer the stress of limited resources, for instance adverse environmental conditions such as extreme aridity, the spatial homogeneity of the biomass is lost and self-organized patterns may arise. Here, we report the observation of spiral-shaped patterns in the biomass of grass (genus deyeuxia), under highland arid conditions in the north of Chile. The spiral arms are a few meters long and a few centimeters wide. These dynamic structures are observed in the grazing area of an herbivore member of the South American camelids, the vicuna, on the border of highland wetlands. These spirals cannot be explained by the well-established mathematical models which describe other vegetation patterns (that emerge from a Turing-type of instability) such as stripes, rings, or fairy circles. We attribute the formation of spirals to the coupling between the growth of vegetation in semiarid regions and the grazing of vicunas. The mathematical analysis of this coupling reveals an excitable behavior, i.e. small perturbations of the equilibrium generate large trajectories before coming back, that is the origin of the spirals.
英文关键词	Vegetation dynamics Arid Grazing Spirals Population dynamics Self-organization
类型	Article
语种	英语
国家	Chile
收录类别	SCI-E
WOS记录号	WOS:000486999500005
WOS关键词	ORIGIN ; WAVES
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/2XILL650/215156
作者单位	Univ Andes, Fac Ingn & Ciencias Aplicadas, Complex Syst Grp, Av Mon Alvaro del Portillo, Santiago 12455, Chile
推荐引用方式 GB/T 7714	Fernandez-Oto, Cristian,Escaff, Daniel,Cisternas, Jaime. Spiral vegetation patterns in high-altitude wetlands[J],2019,37:38-46.
APA	Fernandez-Oto, Cristian,Escaff, Daniel,&Cisternas, Jaime.(2019).Spiral vegetation patterns in high-altitude wetlands.ECOLOGICAL COMPLEXITY,37,38-46.
MLA	Fernandez-Oto, Cristian,et al."Spiral vegetation patterns in high-altitude wetlands".ECOLOGICAL COMPLEXITY 37(2019):38-46.