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| Titel |
Modelling coral calcification accounting for the impacts of coral bleaching and ocean acidification |
| VerfasserIn |
C. Evenhuis, A. Lenton, N. E. Cantin, J. M. Lough |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 9 ; Nr. 12, no. 9 (2015-05-05), S.2607-2630 |
| Datensatznummer |
250117922
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| Publikation (Nr.) |
 copernicus.org/bg-12-2607-2015.pdf |
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| Zusammenfassung |
| Coral reefs are diverse ecosystems that are threatened by rising CO2
levels through increases in sea surface temperature and ocean acidification.
Here we present a new unified model that links changes in temperature and
carbonate chemistry to coral health. Changes in coral health and population
are explicitly modelled by linking rates of growth, recovery and
calcification to rates of bleaching and temperature-stress-induced
mortality. The model is underpinned by four key principles: the Arrhenius
equation, thermal specialisation, correlated up- and down-regulation of
traits that are consistent with resource allocation trade-offs, and adaption
to local environments. These general relationships allow this model to be
constructed from a range of experimental and observational data. The
performance of the model is assessed against independent data to demonstrate
how it can capture the observed response of corals to stress. We also
provide new insights into the factors that determine calcification rates and
provide a framework based on well-known biological principles to help
understand the observed global distribution of calcification rates. Our
results suggest that, despite the implicit complexity of the coral reef
environment, a simple model based on temperature, carbonate chemistry and
different species can give insights into how corals respond to changes in
temperature and ocean acidification. |
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