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Size-dependent physiological responses of the branching coral Pocillopora verrucosa to elevated temperature and PCO2.
J Exp Biol. 2016 12 15; 219(Pt 24):3896-3906.JE

Abstract

Body size has large effects on organism physiology, but these effects remain poorly understood in modular animals with complex morphologies. Using two trials of a ∼24 day experiment conducted in 2014 and 2015, we tested the hypothesis that colony size of the coral Pocillopora verrucosa affects the response of calcification, aerobic respiration and gross photosynthesis to temperature (∼26.5 and ∼29.7°C) and PCO2 (∼40 and ∼1000 µatm). Large corals calcified more than small corals, but at a slower size-specific rate; area-normalized calcification declined with size. Whole-colony and area-normalized calcification were unaffected by temperature, PCO2 , or the interaction between the two. Whole-colony respiration increased with colony size, but the slopes of these relationships differed between treatments. Area-normalized gross photosynthesis declined with colony size, but whole-colony photosynthesis was unaffected by PCO2 , and showed a weak response to temperature. When scaled up to predict the response of large corals, area-normalized metrics of physiological performance measured using small corals provide inaccurate estimates of the physiological performance of large colonies. Together, these results demonstrate the importance of colony size in modulating the response of branching corals to elevated temperature and high PCO2.

Authors+Show Affiliations

Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA 91330-8303, USA peter.edmunds@csun.edu.Department of Biological Science, Florida State University, 319 Stadium Drive, Tallahassee, FL 32306-4295, USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

27802143

Citation

Edmunds, Peter J., and Scott C. Burgess. "Size-dependent Physiological Responses of the Branching Coral Pocillopora Verrucosa to Elevated Temperature and PCO2." The Journal of Experimental Biology, vol. 219, no. Pt 24, 2016, pp. 3896-3906.
Edmunds PJ, Burgess SC. Size-dependent physiological responses of the branching coral Pocillopora verrucosa to elevated temperature and PCO2. J Exp Biol. 2016;219(Pt 24):3896-3906.
Edmunds, P. J., & Burgess, S. C. (2016). Size-dependent physiological responses of the branching coral Pocillopora verrucosa to elevated temperature and PCO2. The Journal of Experimental Biology, 219(Pt 24), 3896-3906.
Edmunds PJ, Burgess SC. Size-dependent Physiological Responses of the Branching Coral Pocillopora Verrucosa to Elevated Temperature and PCO2. J Exp Biol. 2016 12 15;219(Pt 24):3896-3906. PubMed PMID: 27802143.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Size-dependent physiological responses of the branching coral Pocillopora verrucosa to elevated temperature and PCO2. AU - Edmunds,Peter J, AU - Burgess,Scott C, Y1 - 2016/10/06/ PY - 2016/07/18/received PY - 2016/10/03/accepted PY - 2016/11/2/pubmed PY - 2017/8/19/medline PY - 2016/11/2/entrez KW - Climate change KW - Ocean acidification KW - Scleractinia KW - Temperature SP - 3896 EP - 3906 JF - The Journal of experimental biology JO - J Exp Biol VL - 219 IS - Pt 24 N2 - Body size has large effects on organism physiology, but these effects remain poorly understood in modular animals with complex morphologies. Using two trials of a ∼24 day experiment conducted in 2014 and 2015, we tested the hypothesis that colony size of the coral Pocillopora verrucosa affects the response of calcification, aerobic respiration and gross photosynthesis to temperature (∼26.5 and ∼29.7°C) and PCO2 (∼40 and ∼1000 µatm). Large corals calcified more than small corals, but at a slower size-specific rate; area-normalized calcification declined with size. Whole-colony and area-normalized calcification were unaffected by temperature, PCO2 , or the interaction between the two. Whole-colony respiration increased with colony size, but the slopes of these relationships differed between treatments. Area-normalized gross photosynthesis declined with colony size, but whole-colony photosynthesis was unaffected by PCO2 , and showed a weak response to temperature. When scaled up to predict the response of large corals, area-normalized metrics of physiological performance measured using small corals provide inaccurate estimates of the physiological performance of large colonies. Together, these results demonstrate the importance of colony size in modulating the response of branching corals to elevated temperature and high PCO2. SN - 1477-9145 UR - https://www.unboundmedicine.com/medline/citation/27802143/Size_dependent_physiological_responses_of_the_branching_coral_Pocillopora_verrucosa_to_elevated_temperature_and_PCO2_ L2 - http://jeb.biologists.org/cgi/pmidlookup?view=long&pmid=27802143 DB - PRIME DP - Unbound Medicine ER -