1°C warming increases spatial competition frequency and complexity in Antarctic marine macrofauna

Barnes, D.K.A. ORCID:; Ashton, G.V.; Morley, S.A. ORCID:; Peck, L.S. ORCID: 2021 1°C warming increases spatial competition frequency and complexity in Antarctic marine macrofauna. Communications Biology, 4, 208. 7, pp.

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Environmental conditions of the Southern Ocean around Antarctica have varied little for >5 million years but are now changing. Here we investigated how warming affects competition for space. Little considered in the polar regions, this is a critical component of biodiversity response. Change in competition in response to environment forcing might be detectable earlier than individual species presence/absence or performance measures (e.g. growth). Examination of fauna on artificial substrata in Antarctica’s shallows at ambient or warmed temperature found that, mid-century predicted 1°C warming (throughout the year or just summer-only), increased the probability of individuals encountering spatial competition, as well as density and complexity of such interactions. 2°C, late century predicted warming, increased variance in the probability and density of competition, but overall, competition did not significantly differ from ambient (control) levels. In summary only 1°C warming increased probability, density and complexity of spatial competition, which seems to be summer-only driven.

Item Type: Publication - Article
Digital Object Identifier (DOI):
ISSN: 2399-3642
Date made live: 22 Feb 2021 10:17 +0 (UTC)

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