The environmental context and traits of habitat-forming bivalves influence the magnitude of their ecosystem engineering

Daniel C. Bateman, Melanie J. Bishop

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The effective use of ecosystem engineers in biodiversity conservation is contingent on an understanding of those factors that influence the magnitude and direction of their effects. At patch scales, effects of ecosystem engineers on associated communities can range from positive to negative according to how the ecosystem engineer modifies environmental conditions. In a metaanalysis of 68 empirical studies, we assessed how, for a widespread group of ecosystem engineers- the marine habitat-forming bivalves-bivalve taxon, density, habitat, tidal elevation and latitude, as well as habit, or lifestyle, of associated taxa, influences the magnitude and direction of their effect on associated invertebrates. Overall, marine bivalves had a positive effect on both species abundance and species density, but effect sizes varied considerably according to bivalve traits and environmental setting. Oysters enhanced invertebrate abundance to a greater extent than either mussels or pinnids, perhaps because of the greater habitat heterogeneity they provide. Nevertheless, the effect of mussels on associated communities was generally more responsive to spatial variation in engineer traits and environmental context than the effect of oysters or pinnids. Positive effects of mussels on associated species abundance decreased at high mussel densities, were greater at subtidal than mid-low intertidal elevations and differed among faunal habits depending on habitat setting. Knowledge of those conditions under which positive effects of bivalves on associated biodiversity is greatest will help in identifying which species of ecosystem engineer, at which sites, should be prioritised for conservation and restoration, where the goal is enhancement of biodiversity.

LanguageEnglish
Pages95-110
Number of pages16
JournalMarine Ecology Progress Series
Volume563
DOIs
Publication statusPublished - 20 Jan 2017

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ecosystem engineering
bivalve
Bivalvia
mussels
habitat
habitats
biodiversity
oysters
ecosystem
invertebrates
engineers
invertebrate
lifestyle
spatial variation
effect
ecosystem engineers
scale effect
environmental factors
environmental conditions

Cite this

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The environmental context and traits of habitat-forming bivalves influence the magnitude of their ecosystem engineering. / Bateman, Daniel C.; Bishop, Melanie J.

In: Marine Ecology Progress Series, Vol. 563, 20.01.2017, p. 95-110.

Research output: Contribution to journalArticleResearchpeer-review

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