气候变化领域集成服务门户(CCPortal): Carrying capacity in a heterogeneous environment with habitat connectivity

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DOI	10.1111/ele.12807
	Carrying capacity in a heterogeneous environment with habitat connectivity
	Zhang B.; Kula A.; Mack K.M.L.; Zhai L.; Ryce A.L.; Ni W.-M.; DeAngelis D.L.; Van Dyken J.D.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:9
英文摘要	A large body of theory predicts that populations diffusing in heterogeneous environments reach higher total size than if non-diffusing, and, paradoxically, higher size than in a corresponding homogeneous environment. However, this theory and its assumptions have not been rigorously tested. Here, we extended previous theory to include exploitable resources, proving qualitatively novel results, which we tested experimentally using spatially diffusing laboratory populations of yeast. Consistent with previous theory, we predicted and experimentally observed that spatial diffusion increased total equilibrium population abundance in heterogeneous environments, with the effect size depending on the relationship between r and K. Refuting previous theory, however, we discovered that homogeneously distributed resources support higher total carrying capacity than heterogeneously distributed resources, even with species diffusion. Our results provide rigorous experimental tests of new and old theory, demonstrating how the traditional notion of carrying capacity is ambiguous for populations diffusing in spatially heterogeneous environments. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Carrying capacity; consumer–resource model; dispersal experiment; environmental stressor; heterogeneous resource distribution; r-K relationship; spatially distributed population
学科领域	ecosystem; environment; environmental protection; population dynamics; Conservation of Natural Resources; Ecosystem; Environment; Population Dynamics
语种	英语
scopus关键词	ecosystem; environment; environmental protection; population dynamics; Conservation of Natural Resources; Ecosystem; Environment; Population Dynamics
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118341
作者单位	Department of Biology, University of Miami, Coral Gables, FL, United States; Department of Biology, Illinois College, Jacksonville, IL, United States; Department of Mathematics, University of Miami, Coral Gables, FL, United States; School of Mathematics, University of Minnesota, Minneapolis, MN, United States; Center for Partial Differential Equations, East China Normal University, Putuo Qu, Shanghai Shi, China; Wetland and Aquatic Research Center, U.S. Geological Survey, Gainesville, FL, United States
推荐引用方式 GB/T 7714	Zhang B.,Kula A.,Mack K.M.L.,et al. Carrying capacity in a heterogeneous environment with habitat connectivity[J],2017,20(9).
APA	Zhang B..,Kula A..,Mack K.M.L..,Zhai L..,Ryce A.L..,...&Van Dyken J.D..(2017).Carrying capacity in a heterogeneous environment with habitat connectivity.Ecology Letters,20(9).
MLA	Zhang B.,et al."Carrying capacity in a heterogeneous environment with habitat connectivity".Ecology Letters 20.9(2017).