McCorkle, Daniel C.
Churchill, James H.
Duarte, Carlos M.
KAUST DepartmentMarine Science Program
Red Sea Research Center (RSRC)
Biological and Environmental Sciences and Engineering (BESE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/656126
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AbstractWe use observations of dissolved inorganic carbon (DIC) and total alkalinity (TA) to assess the impact of ecosystem metabolic processes on coastal waters of the eastern Red Sea. A simple, single-end-member mixing model is used to account for the influence of mixing with offshore waters and evaporation-precipitation and to model ecosystem-driven perturbations on the carbonate system chemistry of coral reefs, seagrass meadows and mangrove forests. We find that (1) along-shelf changes in TA and DIC exhibit strong linear relationships that are consistent with basin-scale net calcium carbonate precipitation; (2) ecosystem-driven changes in TA and DIC are larger than offshore variations in >70 % of sampled seagrass meadows and mangrove forests, changes which are influenced by a combination of longer water residence times and community metabolic rates; and (3) the sampled mangrove forests show strong and consistent contributions from both organic respiration and other sedimentary processes (carbonate dissolution and secondary redox processes), while seagrass meadows display more variability in the relative contributions of photosynthesis and other sedimentary processes (carbonate precipitation and oxidative processes). The results of this study highlight the importance of resolving the influences of water residence times, mixing and upstream habitats on mediating the carbonate system and coastal air-sea carbon dioxide fluxes over coastal habitats in the Red Sea.
CitationBaldry, K., Saderne, V., McCorkle, D. C., Churchill, J. H., Agusti, S., & Duarte, C. M. (2020). Anomalies in the carbonate system of Red Sea coastal habitats. Biogeosciences, 17(2), 423–439. doi:10.5194/bg-17-423-2020
SponsorsThis research has been supported by the King Abdullah University of Science and Technology (KAUST) (grant nos. BAS/1/1071-01-01 and BAS/1/1072-01-01) and the Investment in Science fund at WHOI.
RelationsIs Supplemented By:
Baldry, K., Saderne, V., McCorkle, D. C., Churchill, J. H., Agustí, S., & Duarte, C. M. (2019). Surface Carbonate Chemistry of the Red Sea (offshore and coastal), supplement to: Baldry, Kimberlee; Saderne, Vincent; McCorkle, Daniel C; Churchill, J H; Agustí, Susana; Duarte, Carlos Manuel (2020): Anomalies in the carbonate system of Red Sea coastal habitats. Biogeosciences, 17(2), 423-439 [Data set]. PANGAEA - Data Publisher for Earth & Environmental Science. https://doi.org/10.1594/PANGAEA.899850. DOI: 10.1594/pangaea.899850 Handle: 10754/662353
Except where otherwise noted, this item's license is described as Archived with thanks to Biogeosciences