DOI: 10.1007/s10144-008-0117-1

Metacommunity-level coexistence mechanisms in rocky intertidal sessile assemblages based on a new empirical synthesis

1. Graduate School of Environmental Science, Hokkaido University

Correspondence to:
Takashi Noda
Email: noda@ees.hokudai.ac.jp

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Abstract

Advances in community ecology rely on connecting empirical work to theoretical frameworks. In a metacommunity, various coexistence mechanisms should operate on various spatial scales. This review attempts to provide a new empirical synthesis organizing various coexistence mechanisms operating in real metacommunities. This synthesis is based on (1) theoretical frameworks involving comparative predictions and assumptions of various coexistence hypotheses, and (2) empirical understanding of the context dependency of species interactions relating to environmental heterogeneity. By applying this synthesis to rocky intertidal sessile assemblages, which are model systems for studying competitive coexistence, I attempt to provide several integrative views of coexistence and future prospects for research in this system. Nine types of common coexistence mechanism, including five local coexistence mechanisms, two coexistence mechanisms in a homogeneous competitive environment, and two mechanisms in a heterogeneous competitive environment are found to operate in rocky intertidal sessile metacommunities, and their relative importance varies depending on species group, environment, and spatial scale.

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