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DOI10.1111/ele.12807
Carrying capacity in a heterogeneous environment with habitat connectivity
Zhang, Bo1; Kula, Alex1; Mack, Keenan M. L.2; Zhai, Lu1,3; Ryce, Arrix L.1; Ni, Wei-Ming4,5; DeAngelis, Donald L.6; Van Dyken, J. David1
2017-09-01
发表期刊ECOLOGY LETTERS
ISSN1461-023X
EISSN1461-0248
出版年2017
卷号20期号:9
文章类型Article
语种英语
国家USA; Peoples R China
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.


英文关键词Carrying capacity consumer-resource model dispersal experiment environmental stressor heterogeneous resource distribution r-K relationship spatially distributed population
领域资源环境
收录类别SCI-E
WOS记录号WOS:000407391900003
WOS关键词SPATIAL HETEROGENEITY ; FRAGMENTATION ; BIODIVERSITY ; POPULATION ; DISPERSAL ; RATES ; GROWTH ; MODELS ; SINGLE
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/31507
专题资源环境科学
作者单位1.Univ Miami, Dept Biol, Coral Gables, FL 33124 USA;
2.Illinois Coll, Dept Biol, Jacksonville, IL USA;
3.Univ Miami, Dept Math, Coral Gables, FL 33124 USA;
4.Univ Minnesota, Sch Math, Minneapolis, MN 55455 USA;
5.East China Normal Univ, Ctr Partial Differential Equat, Putuo Qu, Shanghai Shi, Peoples R China;
6.US Geol Survey, Wetland & Aquat Res Ctr, Gainesville, FL USA
推荐引用方式
GB/T 7714
Zhang, Bo,Kula, Alex,Mack, Keenan M. L.,et al. Carrying capacity in a heterogeneous environment with habitat connectivity[J]. ECOLOGY LETTERS,2017,20(9).
APA Zhang, Bo.,Kula, Alex.,Mack, Keenan M. L..,Zhai, Lu.,Ryce, Arrix L..,...&Van Dyken, J. David.(2017).Carrying capacity in a heterogeneous environment with habitat connectivity.ECOLOGY LETTERS,20(9).
MLA Zhang, Bo,et al."Carrying capacity in a heterogeneous environment with habitat connectivity".ECOLOGY LETTERS 20.9(2017).
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