Variations in coral reef net community calcification and aragonite saturation state on local and global scales
Bernstein, Whitney N.
MetadataShow full item record
Predicting the response of net community calcification (NCC) to ocean acidification (OA) and declining aragonite saturation state (Ωa) requires a thorough understanding of controls on NCC. The diurnal control of light and net community production (NCP) on NCC confounds the underlying control of Ωa on NCC and must be averaged out in order to predict the general response of NCC to OA. I did this by generating a general NCC-Ωa correlation based on data from 15 field and mesocosm studies around the globe. The general relationship agrees well with results from mesocosm experiments. This general relationship implies that NCC will transition from net calcification to net dissolution at a Ωa of 1.0 ± 0.6 and predicts that NCC will decline by 50% from 1880 to 2100, for a reef of any percent calcifier cover and short reef water residence time. NCC will also decline if percent calcifier cover declines, as evidenced by estimates of NCC in two Caribbean reefs having declined by an estimated 50-90% since 1880. The general NCC-Ωa relationship determined here, along with changes in percent calcifier cover, will be useful in predicting changes in NCC in response to OA and for refining models of reef water Ωa.
Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2013
Suggested CitationThesis: Bernstein, Whitney N., "Variations in coral reef net community calcification and aragonite saturation state on local and global scales", 2013-09, DOI:10.1575/1912/6219, https://hdl.handle.net/1912/6219
Showing items related by title, author, creator and subject.
Lane, D. Philip (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-09)Hurricane activity in the Northeastern Gulf of Mexico and its relationship to regional and large-scale climate variability during the Late Holocene is explored. A 4500-year record of hurricane-induced storm surges is ...
Low-latitude western north atlantic climate variability during the past millennium : insights from proxies and models Saenger, Casey P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-09)Estimates of natural climate variability during the past millennium provide a frame of reference in which to assess the significance of recent changes. This thesis investigates new methods of reconstructing low-latitude ...
Stuermer, Daniel H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1975-09)Humic substances were isolated in gram quantities from seawater by a newly developed procedure of adsorption on a crosslinked polystyrene-divinylbenzene resin. The chemical and physical characteristics of both humic acid ...