Dual species interaction and ecological community stability

Author:

Mougi Akihiko1

Affiliation:

1. Institute of Agricultural and Life Sciences, Academic Assembly Shimane University Matsue Japan

Abstract

AbstractHow diverse species coexist in nature remains a challenging issue that is not yet resolved in ecology. The traditional approach to tackling this problem uses an ecological community network comprising various biological interaction links between species, such as predator–prey, mutualism, and competition. However, in nature, the interaction between any species pair is not limited to a singular interaction; instead, various interactions occur mostly in two ways, such as competition/facilitation in plants, mutualism/antagonism in consumer–resource mutualisms, and reciprocal predation. Here, using an ecological community model, I show that such so‐called dual interactions play a key role in stabilizing ecological communities. Theory predicts that dual interactions can stabilize ecological communities through the balance of positive and negative effects, which behave as if the interactions disappear. Communities with dual interactions are inherently more stable than a classical random community with multiple types of singular interactions, suggesting that dual interactions are more widespread than expected in nature and help to maintain ecological communities.

Publisher

Wiley

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