Global warming impairs stock-recruitment dynamics of corals

Hughes, Terry P., Kerry, James T., Baird, Andrew H., Connolly, Sean R., Chase, Tory J., Dietzel, Andreas, Hill, Tessa, Hoey, Andrew S., Hoogenboom, Mia O., Jacobson, Mizue, Kerswell, Ailsa, Madin, Joshua S., Mieog, Abbie, Paley, Allison S., Pratchett, Morgan S., Torda, Gergely, and Woods, Rachael M. (2019) Global warming impairs stock-recruitment dynamics of corals. Nature, 568 (7752). pp. 387-401.

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Abstract

Changes in disturbance regimes due to climate change are increasingly challenging the capacity of ecosystems to absorb recurrent shocks and reassemble afterwards, escalating the risk of widespread ecological collapse of current ecosystems and the emergence of novel assemblages(1-3). In marine systems, the production of larvae and recruitment of functionally important species are fundamental processes for rebuilding depleted adult populations, maintaining resilience and avoiding regime shifts in the face of rising environmental pressures(4,5). Here we document a regional-scale shift in stock-recruitment relationships of corals along the Great Barrier Reef-the world's largest coral reef system-following unprecedented back-to-back mass bleaching events caused by global warming. As a consequence of mass mortality of adult brood stock in 2016 and 2017 owing to heat stress(6), the amount of larval recruitment declined in 2018 by 89% compared to historical levels. For the first time, brooding pocilloporids replaced spawning acroporids as the dominant taxon in the depleted recruitment pool. The collapse in stock-recruitment relationships indicates that the low resistance of adult brood stocks to repeated episodes of coral bleaching is inexorably tied to an impaired capacity for recovery, which highlights the multifaceted processes that underlie the global decline of coral reefs. The extent to which the Great Barrier Reef will be able to recover from the collapse in stock-recruitment relationships remains uncertain, given the projected increased frequency of extreme climate events over the next two decades(7).

Item ID: 58285
Item Type: Article (Research - C1)
ISSN: 1476-4687
Copyright Information: © The Author(s), under exclusive licence to Springer Nature Limited 2019.
Funders: Australian Research Council (ARC)
Projects and Grants: ARC CE140100020
Research Data: http://doi.org/10.25903/5c81fc323d129
Date Deposited: 15 May 2019 07:47
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960305 Ecosystem Adaptation to Climate Change @ 100%
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