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Thresholds and drivers of coral calcification responses to climate change.
Glob Chang Biol. 2018 11; 24(11):5084-5095.GC

Abstract

Increased temperature and CO2 levels are considered key drivers of coral reef degradation. However, individual assessments of ecological responses (calcification) to these stressors are often contradicting. To detect underlying drivers of heterogeneity in coral calcification responses, we developed a procedure for the inclusion of stress-effect relationships in ecological meta-analyses. We applied this technique to a dataset of 294 empirical observations from 62 peer-reviewed publications testing individual and combined effects of elevated temperature and pCO2 on coral calcification. Our results show an additive interaction between warming and acidification, which reduces coral calcification by 20% when pCO2 levels exceed 700 ppm and temperature increases by 3°C. However, stress levels varied among studies and significantly affected outcomes, with unaffected calcification rates under moderate stresses (pCO2 ≤ 700 ppm, ΔT < 3°C). Future coral reef carbon budgets will therefore depend on the magnitude of pCO2 and temperature elevations and, thus, anthropogenic CO2 emissions. Accounting for stress-effect relationships enabled us to identify additional drivers of heterogeneity including coral taxa, life stage, habitat, food availability, climate, and season. These differences can aid reef management identifying refuges and conservation priorities, but without a global effort to reduce CO2 emissions, coral capacity to build reefs will be at risk.

Authors+Show Affiliations

Department of Freshwater and Marine Ecology, Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands. Halmos College of Natural Science and Oceanography, Nova Southeastern University, Dania Beach, Florida.Halmos College of Natural Science and Oceanography, Nova Southeastern University, Dania Beach, Florida.Halmos College of Natural Science and Oceanography, Nova Southeastern University, Dania Beach, Florida.

Pub Type(s)

Journal Article
Meta-Analysis
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30152194

Citation

Kornder, Niklas A., et al. "Thresholds and Drivers of Coral Calcification Responses to Climate Change." Global Change Biology, vol. 24, no. 11, 2018, pp. 5084-5095.
Kornder NA, Riegl BM, Figueiredo J. Thresholds and drivers of coral calcification responses to climate change. Glob Chang Biol. 2018;24(11):5084-5095.
Kornder, N. A., Riegl, B. M., & Figueiredo, J. (2018). Thresholds and drivers of coral calcification responses to climate change. Global Change Biology, 24(11), 5084-5095. https://doi.org/10.1111/gcb.14431
Kornder NA, Riegl BM, Figueiredo J. Thresholds and Drivers of Coral Calcification Responses to Climate Change. Glob Chang Biol. 2018;24(11):5084-5095. PubMed PMID: 30152194.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Thresholds and drivers of coral calcification responses to climate change. AU - Kornder,Niklas A, AU - Riegl,Bernhard M, AU - Figueiredo,Joana, Y1 - 2018/09/26/ PY - 2018/02/07/received PY - 2018/06/15/revised PY - 2018/08/06/accepted PY - 2018/8/29/pubmed PY - 2019/2/5/medline PY - 2018/8/29/entrez KW - anthropogenic CO2 KW - climate change KW - coral calcification KW - effect size meta-analysis KW - elevated temperature KW - interactive effect KW - meta-regression KW - ocean acidification SP - 5084 EP - 5095 JF - Global change biology JO - Glob Chang Biol VL - 24 IS - 11 N2 - Increased temperature and CO2 levels are considered key drivers of coral reef degradation. However, individual assessments of ecological responses (calcification) to these stressors are often contradicting. To detect underlying drivers of heterogeneity in coral calcification responses, we developed a procedure for the inclusion of stress-effect relationships in ecological meta-analyses. We applied this technique to a dataset of 294 empirical observations from 62 peer-reviewed publications testing individual and combined effects of elevated temperature and pCO2 on coral calcification. Our results show an additive interaction between warming and acidification, which reduces coral calcification by 20% when pCO2 levels exceed 700 ppm and temperature increases by 3°C. However, stress levels varied among studies and significantly affected outcomes, with unaffected calcification rates under moderate stresses (pCO2 ≤ 700 ppm, ΔT < 3°C). Future coral reef carbon budgets will therefore depend on the magnitude of pCO2 and temperature elevations and, thus, anthropogenic CO2 emissions. Accounting for stress-effect relationships enabled us to identify additional drivers of heterogeneity including coral taxa, life stage, habitat, food availability, climate, and season. These differences can aid reef management identifying refuges and conservation priorities, but without a global effort to reduce CO2 emissions, coral capacity to build reefs will be at risk. SN - 1365-2486 UR - https://www.unboundmedicine.com/medline/citation/30152194/Thresholds_and_drivers_of_coral_calcification_responses_to_climate_change_ L2 - https://doi.org/10.1111/gcb.14431 DB - PRIME DP - Unbound Medicine ER -