Journal
JOURNAL OF THEORETICAL BIOLOGY
Volume 360, Issue -, Pages 54-58Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jtbi.2014.06.030
Keywords
Predator-prey; Mutualism; Competition; Stability; Complexity
Categories
Funding
- Environment Research and Technology Development Fund of the Ministry of the Environment Japan [D-1102]
- Japan Society for the Promotion of Science [20370012, 25840164, 23657019, 30388160]
- Grants-in-Aid for Scientific Research [20370012, 23657019, 25840164] Funding Source: KAKEN
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Theory predicts that ecological communities of many interacting species are unstable, despite the fact that complex ecosystems persist in nature. A recent theoretical study hypothesised that coexistence of antagonism and mutualism can stabilise a community and even give rise to a positive complexity-stability relationship. Here, using a theoretical model, we extended the earlier hypothesis to include competition as a third major interaction type, and showed that interaction-type diversity generally enhances stability of complex communities. Furthermore, we report a new finding that the hierarchically structured antagonistic interaction network is important for the stabilizing effect of interaction type diversity to emerge in complex communities. The present study indicated that the complexities characterised by species number, connectance, species variation, and interaction type diversity synergistically contributed to maintaining communities, and posed an interesting question of how present complex communities emerged, and developed from simpler ecosystems. (C) 2014 Elsevier Ltd. All rights reserved.
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