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Conspecific aggregations mitigate the effects of ocean acidification on calcification of the coral Pocillopora verrucosa.
J Exp Biol. 2017 03 15; 220(Pt 6):1097-1105.JE

Abstract

In densely populated communities, such as coral reefs, organisms can modify the physical and chemical environment for neighbouring individuals. We tested the hypothesis that colony density (12 colonies each placed ∼0.5 cm apart versus ∼8 cm apart) can modulate the physiological response (measured through rates of calcification, photosynthesis and respiration in the light and dark) of the coral Pocillopora verrucosa to partial pressure of CO2 (PCO2) treatments (∼400 μatm and ∼1200 μatm) by altering the seawater flow regimes experienced by colonies placed in aggregations within a flume at a single flow speed. While light calcification decreased 20% under elevated versus ambient PCO2 for colonies in low-density aggregations, light calcification of high-density aggregations increased 23% at elevated versus ambient PCO2 As a result, densely aggregated corals maintained calcification rates over 24 h that were comparable to those maintained under ambient PCO2 , despite a 45% decrease in dark calcification at elevated versus ambient PCO2 Additionally, densely aggregated corals experienced reduced flow speeds and higher seawater retention times between colonies owing to the formation of eddies. These results support recent indications that neighbouring organisms, such as the conspecific coral colonies in the present example, can create small-scale refugia from the negative effects of ocean acidification.

Authors+Show Affiliations

Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA 91330-8303, USA nicolas.r.evensen@gmail.com. Marine Spatial Ecology Lab, Australian Research Council Centre of Excellence for Coral Reef Studies and School of Biological Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia.Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA 91330-8303, 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

28087656

Citation

Evensen, Nicolas R., and Peter J. Edmunds. "Conspecific Aggregations Mitigate the Effects of Ocean Acidification On Calcification of the Coral Pocillopora Verrucosa." The Journal of Experimental Biology, vol. 220, no. Pt 6, 2017, pp. 1097-1105.
Evensen NR, Edmunds PJ. Conspecific aggregations mitigate the effects of ocean acidification on calcification of the coral Pocillopora verrucosa. J Exp Biol. 2017;220(Pt 6):1097-1105.
Evensen, N. R., & Edmunds, P. J. (2017). Conspecific aggregations mitigate the effects of ocean acidification on calcification of the coral Pocillopora verrucosa. The Journal of Experimental Biology, 220(Pt 6), 1097-1105. https://doi.org/10.1242/jeb.152488
Evensen NR, Edmunds PJ. Conspecific Aggregations Mitigate the Effects of Ocean Acidification On Calcification of the Coral Pocillopora Verrucosa. J Exp Biol. 2017 03 15;220(Pt 6):1097-1105. PubMed PMID: 28087656.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Conspecific aggregations mitigate the effects of ocean acidification on calcification of the coral Pocillopora verrucosa. AU - Evensen,Nicolas R, AU - Edmunds,Peter J, Y1 - 2017/01/13/ PY - 2016/11/04/received PY - 2017/01/04/accepted PY - 2017/1/15/pubmed PY - 2017/8/25/medline PY - 2017/1/15/entrez KW - Coral growth KW - Facilitation KW - High PCO2 KW - Hydrodynamics KW - Species interactions SP - 1097 EP - 1105 JF - The Journal of experimental biology JO - J Exp Biol VL - 220 IS - Pt 6 N2 - In densely populated communities, such as coral reefs, organisms can modify the physical and chemical environment for neighbouring individuals. We tested the hypothesis that colony density (12 colonies each placed ∼0.5 cm apart versus ∼8 cm apart) can modulate the physiological response (measured through rates of calcification, photosynthesis and respiration in the light and dark) of the coral Pocillopora verrucosa to partial pressure of CO2 (PCO2) treatments (∼400 μatm and ∼1200 μatm) by altering the seawater flow regimes experienced by colonies placed in aggregations within a flume at a single flow speed. While light calcification decreased 20% under elevated versus ambient PCO2 for colonies in low-density aggregations, light calcification of high-density aggregations increased 23% at elevated versus ambient PCO2 As a result, densely aggregated corals maintained calcification rates over 24 h that were comparable to those maintained under ambient PCO2 , despite a 45% decrease in dark calcification at elevated versus ambient PCO2 Additionally, densely aggregated corals experienced reduced flow speeds and higher seawater retention times between colonies owing to the formation of eddies. These results support recent indications that neighbouring organisms, such as the conspecific coral colonies in the present example, can create small-scale refugia from the negative effects of ocean acidification. SN - 1477-9145 UR - https://www.unboundmedicine.com/medline/citation/28087656/Conspecific_aggregations_mitigate_the_effects_of_ocean_acidification_on_calcification_of_the_coral_Pocillopora_verrucosa_ L2 - http://jeb.biologists.org/cgi/pmidlookup?view=long&pmid=28087656 DB - PRIME DP - Unbound Medicine ER -