干旱区生态环境知识资源中心(Arid): Evaluating current and future range limits of an endangered, keystone rodent (Dipodomys ingens)

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DOI	10.1111/ddi.12914
	Evaluating current and future range limits of an endangered, keystone rodent (Dipodomys ingens)
	Widick, Ivy, V; Bean, William T.
通讯作者	Widick, Ivy, V
来源期刊	DIVERSITY AND DISTRIBUTIONS
ISSN	1366-9516
EISSN	1472-4642
出版年	2019
卷号	25 期号:7 页码:1074-1087
英文摘要	Aim We use current models of species distribution to predict the future habitat suitability for an endangered, keystone rodent (Dipodomys ingens, giant kangaroo rat). We incorporate the possibility of local adaptation and novel competitive interactions to improve the predictive accuracy of our Maxent models. Location San Joaquin Valley, California, USA. Methods We created Maxent models of two isolated populations of D. ingens. Using local surveys and state-wide data, we also modelled California ground squirrels (Otospermophilus beecheyi), a potential novel competitor. Models included landscape variables (slope and soil composition) and climate variables (temperature, precipitation and climatic water deficit). We used Warren's I to evaluate niche overlap between species as well as between isolated populations of the same species. We then projected each set of models into the future to evaluate D. ingens response to climate change. Results Niche overlap between the D. ingens populations was moderate (I = 0.44), suggesting that they already experience different climatic regimes and providing support for population-level modelling. Projecting individual populations separately into the future, under a high emission climate change scenario (CCSM4, rcp8.5), resulted in less predicted range contraction than modelling the species as a whole. However, forecasted distributions showed areas of increasing niche overlap between the Panoche population of D. ingens and O. beecheyi (I = 0.63 to 0.74), indicating competition could be a novel range limit. Main conclusions Modelling the distributions of isolated populations separately provides a more accurate estimation of the species' contemporary niche, capturing not just overlap between the populations, but individually suitable areas as well. Projecting the individual contemporary and historical models into the future allows us to estimate future habitat suitability. Predicting the distribution of a novel competitor characterizes areas of potential competition. Subsequently, management can target suitable areas for preservation and avoid areas of potential novel competition.
英文关键词	California ground squirrel climate change Dipodomys ingens giant kangaroo rat interspecific interaction local adaptation niche model Otospermophilus beecheyi small mammal species distribution model
类型	Article
语种	英语
国家	USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000472770700006
WOS关键词	SPECIES DISTRIBUTION MODELS ; CLIMATE-CHANGE ; POPULATION-STRUCTURE ; BIOTIC INTERACTIONS ; GROUND-SQUIRRELS ; KANGAROO RATS ; DESERT RODENT ; NICHE ; CONSERVATISM ; COMMUNITIES
WOS类目	Biodiversity Conservation ; Ecology
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/2XILL650/215053
作者单位	Humboldt State Univ, Dept Wildlife, Arcata, CA 95521 USA
推荐引用方式 GB/T 7714	Widick, Ivy, V,Bean, William T.. Evaluating current and future range limits of an endangered, keystone rodent (Dipodomys ingens)[J],2019,25(7):1074-1087.
APA	Widick, Ivy, V,&Bean, William T..(2019).Evaluating current and future range limits of an endangered, keystone rodent (Dipodomys ingens).DIVERSITY AND DISTRIBUTIONS,25(7),1074-1087.
MLA	Widick, Ivy, V,et al."Evaluating current and future range limits of an endangered, keystone rodent (Dipodomys ingens)".DIVERSITY AND DISTRIBUTIONS 25.7(2019):1074-1087.