Species-specific consequences of ocean acidification for the calcareous tropical green algae Halimeda, 2011, supplement to: Price, Nichole N; Hamilton, Scott L; Tootell, Jesse S; Smith, Jennifer E (2011): Species-specific consequences of ocean acidification for the calcareous tropical green algae Halimeda. Marine Ecology Progress Series, 440, 67-78


Ocean acidification (OA), resulting from increasing dissolved carbon dioxide (CO2) in surface waters, is likely to affect many marine organisms, particularly those that calcify. Recent OA studies have demonstrated negative and/or differential effects of reduced pH on growth, development, calcification and physiology, but most of these have focused on taxa other than calcareous benthic macroalgae. Here we investigate the potential effects of OA on one of the most common coral reef macroalgal genera,Halimeda. Species of Halimeda produce a large proportion of the sand in the tropics and are a major contributor to framework development on reefs because of their rapid calcium carbonate production and high turnover rates. On Palmyra Atoll in the central Pacific, we conducted a manipulative bubbling experiment to investigate the potential effects of OA on growth, calcification and photophysiology of 2 species of Halimeda. Our results suggest that Halimeda is highly susceptible to reduced pH and aragonite saturation state but the magnitude of these effects is species specific. H. opuntiasuffered net dissolution and 15% reduction in photosynthetic capacity, while H. taenicola did not calcify but did not alter photophysiology in experimental treatments. The disparate responses of these species to elevated CO2 partial -pressure (pCO2) may be due to anatomical and physiological differences and could represent a shift in their relative dominance in the face of OA. The ability for a species to exert biological control over calcification and the species specific role of the carbonate skeleton may have important implications for the potential effects of OA on ecological function in the future.

DOI https://doi.org/10.1594/PANGAEA.779703
Related Identifier https://doi.org/10.3354/meps09309
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.779703
Creator Price, Nichole N; Hamilton, Scott L; Smith, Jennifer E; Tootell, Jesse S
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2011
Funding Reference Seventh Framework Programme, 211384; Sixth Framework Programme, 511106
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Supplementary Collection of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (-162.128W, 5.866S, -162.075E, 5.897N)
Temporal Coverage Begin 2009-01-10T13:14:00Z
Temporal Coverage End 2009-11-10T16:54:00Z