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Abstract

The global ocean has warmed substantially over the past century, with far-reaching implications for marine ecosystems. Concurrent with long-term persistent warming, discrete periods of extreme regional ocean warming (marine heatwaves, MHWs) have increased in frequency. Here we quantify trends and attributes of MHWs across all ocean basins and examine their biological impacts from species to ecosystems. Multiple regions in the Pacific, Atlantic and Indian Oceans are particularly vulnerable to MHW intensification, due to the co-existence of high levels of biodiversity, a prevalence of species found at their warm range edges or concurrent non-climatic human impacts. The physical attributes of prominent MHWs varied considerably, but all had deleterious impacts across a range of biological processes and taxa, including critical foundation species (corals, seagrasses and kelps). MHWs, which will probably intensify with anthropogenic climate change, are rapidly emerging as forceful agents of disturbance with the capacity to restructure entire ecosystems and disrupt the provision of ecological goods and services in coming decades.

Item Type:	Article
Authors/Creators:	Smale, DA and Wernberg, T and Oliver, ECJ and Thomsen, M and Harvey, BP and Straub, SC and Burrows, MT and Alexander, LV and Benthuysen, JA and Donat, MG and Feng, M and Hobday, AJ and Holbrook, NJ and Perkins-Kirkpatrick, SE and Scannell, HA and Sen Gupta, A and Payne, BL and Moore, PJ
Keywords:	marine heatwaves, threats to global biodiversity, provision of ecosystem services
Journal or Publication Title:	Nature Climate Change
Publisher:	Nature Publishing Group
ISSN:	1758-678X
DOI / ID Number:	10.1038/s41558-019-0412-1
Copyright Information:	Copyright 2019 Springer Nature
Related URLs:	Google Scholar: Oliver, ECJ UTAS Profile: Oliver, ECJ Google Scholar: Holbrook, NJ UTAS Profile: Holbrook, NJ
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