DOI: 10.1111/ele.12807
Scopus记录号: 2-s2.0-85023758653
论文题名: Carrying capacity in a heterogeneous environment with habitat connectivity
作者: Zhang B. ; Kula A. ; Mack K.M.L. ; Zhai L. ; Ryce A.L. ; Ni W.-M. ; DeAngelis D.L. ; Van Dyken J.D.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期: 9 起始页码: 1118
结束页码: 1128
语种: 英语
英文关键词: Carrying capacity
; consumer–resource model
; dispersal experiment
; environmental stressor
; heterogeneous resource distribution
; r-K relationship
; spatially distributed population
Scopus关键词: ecosystem
; environment
; environmental protection
; population dynamics
; Conservation of Natural Resources
; Ecosystem
; Environment
; Population Dynamics
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107578
Appears in Collections: 气候减缓与适应
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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
Recommended Citation:
Zhang B.,Kula A.,Mack K.M.L.,et al. Carrying capacity in a heterogeneous environment with habitat connectivity[J]. Ecology Letters,2017-01-01,20(9)