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Coral reefs on the edge? Carbon chemistry on inshore reefs of the great barrier reef

, : Coral reefs on the edge? Carbon chemistry on inshore reefs of the great barrier reef. Plos One 9(10): E109092-E109092

While increasing atmospheric carbon dioxide (CO2) concentration alters global water chemistry (Ocean Acidification; OA), the degree of changes vary on local and regional spatial scales. Inshore fringing coral reefs of the Great Barrier Reef (GBR) are subjected to a variety of local pressures, and some sites may already be marginal habitats for corals. The spatial and temporal variation in directly measured parameters: Total Alkalinity (TA) and dissolved inorganic carbon (DIC) concentration, and derived parameters: partial pressure of CO2 (pCO2); pH and aragonite saturation state (Ωar) were measured at 14 inshore reefs over a two year period in the GBR region. Total Alkalinity varied between 2069 and 2364 µmol kg-1 and DIC concentrations ranged from 1846 to 2099 µmol kg-1. This resulted in pCO2 concentrations from 340 to 554 µatm, with higher values during the wet seasons and pCO2 on inshore reefs distinctly above atmospheric values. However, due to temperature effects, Ωar was not further reduced in the wet season. Aragonite saturation on inshore reefs was consistently lower and pCO2 higher than on GBR reefs further offshore. Thermodynamic effects contribute to this, and anthropogenic runoff may also contribute by altering productivity (P), respiration (R) and P/R ratios. Compared to surveys 18 and 30 years ago, pCO2 on GBR mid- and outer-shelf reefs has risen at the same rate as atmospheric values (∼1.7 µatm yr-1) over 30 years. By contrast, values on inshore reefs have increased at 2.5 to 3 times higher rates. Thus, pCO2 levels on inshore reefs have disproportionately increased compared to atmospheric levels. Our study suggests that inshore GBR reefs are more vulnerable to OA and have less buffering capacity compared to offshore reefs. This may be caused by anthropogenically induced trophic changes in the water column and benthos of inshore reefs subjected to land runoff.


PMID: 25295864

DOI: 10.1371/journal.pone.0109092

Other references

Robson, R.; O'-Shea, J.; Hartzer, M.; Rathbun, W.; Lasalle, F.S.hreiner, P.; Kasang, L.; Stromer, M.; Lusby, M.; Ridpath, J., 1984: Role of new cytoskeletal elements in maintenance of muscle integrity. Journal of food biochemistry 8(1): 1-24

Park, S.; Kelaidi, C.; Dreyfus, Fçois., 2017: Which second line treatments after ESA failure?. Oncotarget 8(45): 78255-78256

Ali M.K.; Ewer M.S.; Gibbs H.R.; Swafford J., 1992: Cardiovascular emergencies in cancer patients. Rapid Advances in the diagnosis and treatment of neoplastic diseases have led to higher rates of cure and longer patient survival. Unfortunately, many of these aggressive therapies as well as the cancer itself can cause acute and potentially fatal...

Milone, S.D.; Azevedo, E.R.; Parker, A.B.; Foster, C.; Parker, J.D., 1998: Angiotensin II receptor antagonism does not prevent tolerance to continuous transdermal nitroglycerin. Journal of the American College of Cardiology 31(2 SUPPL A): 15A, Feb

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Rojo-Ortega, J.M.; Casado, S.; Rosenthal, J.; Boucher, R.; Genest, J., 1973: The renin-angiotensin system in urinephrectomized adrenalectomized rats. Experientia 29(3): 285-286

Kazandzhiev, R., 1973: Correction of mammary gland hypoplasia by H. G. Arion's retroglandular balloon prosthesis. Khirurgiia 26(4): 339-341

Chauhan, D.; Uchiyama, H.; Urashima, M.; Yamamoto, K.; Anderson, K.C., 1995: Regulation of interleukin 6 in multiple myeloma and bone marrow stromal cells. We and others have shown that some freshly isolated multiple myeloma (MM) cells and derived cell lines express interleukin 6 (IL-6) receptors and proliferate in vitro in response to IL-6; a subset of MM cells also expresses IL-6 mRNA, is intracyto...

Porta, E.A., 2002: Pigments in aging: an overview. Although during the normal aging process there are numerous pigmentary changes, the best recognized are those of melanin and lipofuscin. Melanin may increase (e.g., age spots, senile lentigo, or melanosis coli) or decrease (e.g., graying of hair o...

Pickrill R.A.; Currie R.G., 1983: Computer programs to estimate wave generated orbital velocities and threshold erosion velocities. Published empirical formulae have been used to write two Fortran programs to circulate orbital and threshold velocities for a range of controlling conditions. From the tables produced by these programs the stability of the surface sediments can be...