Unifying relationships between complexity and stability in mutualistic ecological communities

JOURNAL OF THEORETICAL BIOLOGY

卷:439

Article

Feng, Wenfeng^1,2  Bailey, Richard M.² 

[1] Henan Polytech Univ, Sch Comp Sci & Technol, Jiaozuo 454003, Henan, Peoples R China

[2] Univ Oxford, Sch Geog & Environm, Oxford, England

关键词: Theoretical ecology;    Mutualistic community;    Complexity;    Stability;    Critical threshold;    Mean-field model;   

DOI  :  10.1016/j.jtbi.2017.11.026

来源: Elsevier

【 摘 要 】

Conserving ecosystem function and associated services requires deep understanding of the underlying basis of system stability. While the study of ecological dynamics is a mature and diverse field, the lack of a general model that predicts a broad range of theoretical and empirical observations has allowed unresolved contradictions to persist. Here we provide a general model of mutualistic ecological interactions between two groups and show for the first time how the conditions for bi-stability, the nature of critical transitions, and identifiable leading indicators in time-series can be derived from the basic parameters describing the underlying ecological interactions. Strong mutualism and nonlinearity in handling-time are found to be necessary conditions for the occurrence of critical transitions. We use the model to resolve open questions concerning the effects of heterogeneity in inter-species interactions on both resilience and abundance, and discuss these in terms of potential trade-offs in real systems. This framework provides a basis for rich investigations of ecological system dynamics, and may be generalizable across many ecological contexts. (c) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free