干旱区生态环境知识资源中心(Arid): Choosing what is left: the spatial structure of a wild herbivore population within a livestock-dominated landscape

Arid

DOI	10.7717/peerj.8945
	Choosing what is left: the spatial structure of a wild herbivore population within a livestock-dominated landscape
	Antun, Milagros 1,2; Baldi, Ricardo 1,3
通讯作者	Antun, Milagros
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	Shrublands and grasslands comprise over 30% of the land surface and are among the most exploited ecosystems for livestock production. Across natural landscapes, the distribution and abundance of wild herbivores are affected by interspecific competition for foraging resources, hunting and the development of infrastructure among other factors. In Argentine Patagonia, the abundance of domestic sheep grazing on native vegetation outnumbers the widely distributed guanaco (Lama guanicoe) and sheep ranching monopolizes the most productive lands. In this work, we aimed to assess the spatial variation in the abundance of guanacos in Peninsula Valdes, a representative landscape of Patagonia, investigating the incidence of natural and human-related factors. We conducted ground surveys during the austral autumn in 2017 totaling 383.4 km along areas with and without sheep ranching. We built density surface models to account for the variation in guanaco abundance and obtained a map of guanaco density at a resolution of 4 km(2). We estimated an overall density of 11.71 guanacos.km(-2) for a prediction area of 3,196 km(2), although the density of guanacos tripled in areas where sheep ranching was terminated (in around 20% of the surface of Peninsula Valdes) compared to areas with sheep. Guanacos were more abundant at lower values of primary productivity and sheep stocking rates and further from inhabited ranch buildings, suggesting competition with sheep and conflict with humans. Although guanacos selected open, grass-dominated habitats across sheep-free sites, fences dividing properties and paddocks played a significant role in the spatial structure of their population in Peninsula Valdes affecting negatively the abundance of guanacos. Our results indicate that actions to improve habitat connectivity for guanacos, favor the coexistence among guanacos and sheep ranching, and promote responsible human activities and attitudes towards wildlife are needed.
英文关键词	Distribution and abundance Lama guanicoe Habitat selection Spatial models Sheep ranching Anthropic factors Wild and domestic ungulates Peninsula Valdes Patagonia
类型	Article
语种	英语
国家	Argentina
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000524530100012
WOS关键词	GUANACOS LAMA-GUANICOE ; NORTHERN PATAGONIA ; PENINSULA VALDES ; COMPETITION ; DESERTIFICATION ; ABUNDANCE ; MODELS ; SHEEP ; CONSERVATION ; VEGETATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315299
作者单位	1.Consejo Nacl Invest Cient & Tecn, IPEEC, Grp Estudio Mamiferos Terr, Puerto Madryn, Chubut, Argentina; 2.Univ Nacl Patagonia San Juan Bosco, Fac Ciencias Nat & Ciencias Salud, Dept Biol & Ambiente, Puerto Madryn, Chubut, Argentina; 3.Univ Buenos Aires, Fac Ciencias Exactas & Nat, Programa Maestria Conservac Biodiversidad, Dept Ecol Genet & Evoluc, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Antun, Milagros,Baldi, Ricardo. Choosing what is left: the spatial structure of a wild herbivore population within a livestock-dominated landscape[J],2020,8.
APA	Antun, Milagros,&Baldi, Ricardo.(2020).Choosing what is left: the spatial structure of a wild herbivore population within a livestock-dominated landscape.PEERJ,8.
MLA	Antun, Milagros,et al."Choosing what is left: the spatial structure of a wild herbivore population within a livestock-dominated landscape".PEERJ 8(2020).