气候变化领域集成服务门户(CCPortal): Interspecific competition slows range expansion and shapes range boundaries

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DOI	10.1073/pnas.2009701117
	Interspecific competition slows range expansion and shapes range boundaries
	Legault G.; Bitters M.E.; Hastings A.; Melbourne B.A.
发表日期	2020
ISSN	0027-8424
起始页码	26854
结束页码	26860
卷号	117 期号:43
英文摘要	Species expanding into new habitats as a result of climate change or human introductions will frequently encounter resident competitors. Theoretical models suggest that such interspecific competition can alter the speed of expansion and the shape of expanding range boundaries. However, competitive interactions are rarely considered when forecasting the success or speed of expansion, in part because there has been no direct experimental evidence that competition affects either expansion speed or boundary shape. Here we demonstrate that interspecific competition alters both expansion speed and range boundary shape. Using a two-species experimental system of the flour beetles Tribolium castaneum and Tribolium confusum, we show that interspecific competition dramatically slows expansion across a landscape over multiple generations. Using a parameterized stochastic model of expansion, we find that this slowdown can persist over the long term. We also find that the shape of the moving range boundary changes continuously over many generations of expansion, first steepening and then becoming shallower, due to the competitive effect of the resident and density-dependent dispersal of the invader. This dynamic boundary shape suggests that current forecasting approaches assuming a constant shape could be misleading. More broadly, our results demonstrate that interactions between competing species can play a large role during range expansions and thus should be included in models and studies that monitor, forecast, or manage expansions in natural systems. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Competition; Density-dependent dispersal; Invasion; Range expansion; Stochastic
语种	英语
scopus关键词	article; forecasting; human; interspecific competition; nonhuman; resident; stochastic model; Tribolium castaneum; Tribolium confusum; velocity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160750
作者单位	Legault, G., Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, United States, Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States, Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Bitters, M.E., Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, United States; Hastings, A., Department of Environmental Science and Policy, University of California, Davis, CA 95616, United States, Santa Fe Institute, Santa Fe, NM 87501, United States; Melbourne, B.A., Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309, United States
推荐引用方式 GB/T 7714	Legault G.,Bitters M.E.,Hastings A.,et al. Interspecific competition slows range expansion and shapes range boundaries[J],2020,117(43).
APA	Legault G.,Bitters M.E.,Hastings A.,&Melbourne B.A..(2020).Interspecific competition slows range expansion and shapes range boundaries.Proceedings of the National Academy of Sciences of the United States of America,117(43).
MLA	Legault G.,et al."Interspecific competition slows range expansion and shapes range boundaries".Proceedings of the National Academy of Sciences of the United States of America 117.43(2020).