SCSIO OpenIR  > 中科院海洋生物资源可持续利用重点实验室
Quantitative interpretation of vertical profiles of calcium and pH in the coral coelenteron
Yuan, Xiangcheng1; Cai, Wei-Jun; Meile, Christof; Hopkinson, Brian M.; Ding, Qian4; Schoepf, Verena6,7; Warner, Mark E.; Hoadley, Kenneth D.; Chen, Bingzhang8; Liu, Sheng1; Huang, Hui1; Ye, Ying4; Grottoli, Andrea G.
2018
Source PublicationMARINE CHEMISTRY
ISSN0304-4203
Volume204Pages:62
AbstractScleratinian corals (hard corals) and their symbiotic algae are the ecological engineers of biodiverse and geological important coral reef habitats. The complex, linked physiological processes that enable the holobiont (coral + algae) to calcify and generate reef structures are consequently of great interest. However, the mechanism of calcification is difficult to study for several reasons including the small spatial scales of the processes and the close coupling between the symbiont and host. In this study, we explore the utility of pH and Ca2+ microelectrodes for constraining the rates and spatial distribution of photosynthesis, respiration, and calcification. The work focuses on vertical profiles of pH and Ca2+ through the coelenteron cavity, a semi-isolated compartment of modified seawater amenable to quantitative interpretation. In two studied species, Turbincuia reniformis and Acropora nallepora, Ca2+ concentrations decreased in a roughly linear manner from the mouth to the base of the coelenteron, indicating the primary physiological process affecting Ca2+ concentration is removal for calcification below the coelenteron. In contrast, the H+ concentration remained relatively constant over much of the coelenteron cavity before it increased sharply toward the base of the coelenteron, indicative of proton-pumping from the calcification fluid below. The estimated H+ gradient between the coelenteron cavity and the calcification site was > 10 times higher than previously predicted. Consequently, the energy required to export protons from the calcifying fluid was estimated to be similar to 3 times higher than previously calculated. A one-dimensional reaction-diffusion model was used to interpret the pH profile considering the effects of photosynthesis, respiration, and calcification. This model provided a good fit to the observed pH profile and helped to constrain the rates and spatial distribution of these processes. Our modeling results also suggested that adult corals with deeper polyps may be more sensitive to ocean acidification (OA) because of enhanced difficulty to transport H+ out of the coelenteron and into the surrounding seawater.
DepartmentLMB
KeywordMicrosensors Coral coelenteron Ocean acidification Calcification
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17644
Collection中科院海洋生物资源可持续利用重点实验室
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Bioresources Sustainable Utilizat, Guangzhou 510000, Guangdong, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510000, Guangdong, Peoples R China
3.Cai, Wei-Jun; Warner, Mark E.; Hoadley, Kenneth D.] Univ Delaware, Sch Marine Sci & Policy, Newark, DE 19716 USA
4.Meile, Christof; Hopkinson, Brian M.] Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA
5.Zhejiang Univ, Ocean Coll, Hangzhou 310058, Zhejiang, Peoples R China
6.Schoepf, Verena; Grottoli, Andrea G.] Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA
7.Univ Western Australia, Sch Earth Sci, ARC Ctr Excellence Coral Reef Studies, Crawley, WA, Australia
8.Univ Western Australia, UWA Oceans Inst, Crawley, WA, Australia
9.Japan Agcy Marine Earth Sci & Technol, Res & Dev Ctr Global Change, Ecosyst Dynam Res Grp, Yokohama, Kanagawa, Japan
Recommended Citation
GB/T 7714
Yuan, Xiangcheng,Cai, Wei-Jun,Meile, Christof,et al. Quantitative interpretation of vertical profiles of calcium and pH in the coral coelenteron[J]. MARINE CHEMISTRY,2018,204:62, 69.
APA Yuan, Xiangcheng.,Cai, Wei-Jun.,Meile, Christof.,Hopkinson, Brian M..,Ding, Qian.,...&Grottoli, Andrea G..(2018).Quantitative interpretation of vertical profiles of calcium and pH in the coral coelenteron.MARINE CHEMISTRY,204,62.
MLA Yuan, Xiangcheng,et al."Quantitative interpretation of vertical profiles of calcium and pH in the coral coelenteron".MARINE CHEMISTRY 204(2018):62.
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