干旱区生态环境知识资源中心(Arid): Livestock Effects on Genetic Variation of Creosote Bushes in Patagonian Rangelands

Arid

DOI	10.1017/S0376892918000280
	Livestock Effects on Genetic Variation of Creosote Bushes in Patagonian Rangelands
	Souto, Cintia P.; Tadey, Mariana
通讯作者	Souto, Cintia P.
来源期刊	ENVIRONMENTAL CONSERVATION
ISSN	0376-8929
EISSN	1469-4387
出版年	2019
卷号	46 期号:1 页码:59-66
英文摘要	Genetic diversity is the raw material for species' persistence over time, providing the potential to survive stochastic events, as well as climate and/or human-induced environmental changes. Biodiversity in dry rangelands is decreasing due to intensification of livestock production, but its effects on the genetic diversity of the consumed biota have seldom been assessed. We examined livestock effects on the genetic diversity of two dominant creosote species of the Patagonian Monte Desert, Larrea divaricata and Larrea cuneifolia. We deployed competing hierarchical regression models to assess the relationship between genetic variation within natural populations as a function of increasing stocking rates on ten arid rangelands. These species exhibit similar levels and patterns of genetic structure, with high levels of both inbreeding and divergence among locations. We found that increased stocking reduces genetic variation and increases genetic subdivision between populations. Our results indicate that grazing pressures are impoverishing the gene pool of these dominant native species of the Monte Desert, decreasing the evolutionary potential of the primary plant producers and increasing the desertification risk for a vulnerable habitat. We highlight the importance of considering livestock as a major driver of genetic losses in dry rangelands under overgrazing pressure, especially given current forecasts of climate change.
英文关键词	drylands genetic diversity grazing pressures Larrea spp. livestock density shrublands
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000458543700008
WOS关键词	STARCH-GEL ELECTROPHORESIS ; GRAZING INTENSITY ; POPULATION-SIZE ; MONTE DESERT ; PLANT ; DIVERSITY ; HERBIVORY ; ECOSYSTEM ; CONSEQUENCES ; BIODIVERSITY
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215390
作者单位	Univ Natl Comahue, Lab Ecotono, INIBIOMA, CONICET,CRUB, Quintrai 1250, RA-8400 Banioche, Rio Negro, Argentina
推荐引用方式 GB/T 7714	Souto, Cintia P.,Tadey, Mariana. Livestock Effects on Genetic Variation of Creosote Bushes in Patagonian Rangelands[J],2019,46(1):59-66.
APA	Souto, Cintia P.,&Tadey, Mariana.(2019).Livestock Effects on Genetic Variation of Creosote Bushes in Patagonian Rangelands.ENVIRONMENTAL CONSERVATION,46(1),59-66.
MLA	Souto, Cintia P.,et al."Livestock Effects on Genetic Variation of Creosote Bushes in Patagonian Rangelands".ENVIRONMENTAL CONSERVATION 46.1(2019):59-66.