TY - JOUR
T1 - Mesoscale and Nutrient Conditions Associated with the Massive 2008 Cochlodinium polykrikoides Bloom in the Sea of Oman/Arabian Gulf
AU - Al-Azri, Adnan R.
AU - Piontkovski, Sergey A.
AU - Al-Hashmi, Khalid A.
AU - Goes, Joaquim I.
AU - Gomes, Helga do R.
AU - Glibert, Patricia M.
N1 - Funding Information:
Acknowledgments This study was funded by the Sultan Qaboos University internal grants (IG/AGR/FISH/07/01, IG/AGR/FISH/09/01, and IG/AGR/FISH/13/01). We thank Harub Al Habsi, Salem Al khusaibi for sampling and analysis and crew of R/VAl Jamia. Issa Al Amri College of Medicine for assistance with Electronic microscopy. Funding for PMG was provided by NSF grant number OCE-1015980. We thank J. Alexander for analytical assistance with Electronic microscopy. Funding for JIG and HRG was provided by NASA Grant NNX11AE22G and NSF Grants OCE-1121022 and OCE-1121039. This is contribution number 4785 from the University of Maryland Center for Environmental Science.
PY - 2014/3
Y1 - 2014/3
N2 - Cochlodinium polykrikoides formed large blooms in the coastal waters of Oman from October 2008 through mid-January 2009, and satellite images from Aqua-MODIS and region-wide reports suggest that this bloom was found throughout the Arabian Gulf and Sea of Oman for more than 10 months. The unusual occurrence of this species appears to have supplanted the more regularly occurring bloom species, Noctiluca scintillans, in 2008-2009. For the first 2 weeks of the coastal Omani bloom, C. polykrikoides abundance was near monospecific proportions, with cell densities ranging from 4.6 × 103 to 9 × 106 cells L-1 and very high levels of chlorophyll a (78.0 μg L-1) were also recorded. The regional progression of the bloom likely began with stronger than normal upwelling along the Iranian and northern Omani coasts during the southwest monsoon in late summer, followed by discharge of unusually warm coastal plume water along the coast of Oman with the reversal of monsoonal winds in late October. The occurrence and persistence of high densities of C. polykrikoides in Oman coastal water were also significantly influenced by an elevated nutrient load and warmer than normal temperatures. Concentrations of nutrients, especially NH4 +, urea, PO4 3-, and organic nitrogen and phosphorus, were manyfold higher than observed in the year prior or since. These findings suggest that mesoscale features were important in bloom dynamics more regionally, but locally the bloom was sustained by nutrient enrichment supplemented by its mixotrophic capabilities.
AB - Cochlodinium polykrikoides formed large blooms in the coastal waters of Oman from October 2008 through mid-January 2009, and satellite images from Aqua-MODIS and region-wide reports suggest that this bloom was found throughout the Arabian Gulf and Sea of Oman for more than 10 months. The unusual occurrence of this species appears to have supplanted the more regularly occurring bloom species, Noctiluca scintillans, in 2008-2009. For the first 2 weeks of the coastal Omani bloom, C. polykrikoides abundance was near monospecific proportions, with cell densities ranging from 4.6 × 103 to 9 × 106 cells L-1 and very high levels of chlorophyll a (78.0 μg L-1) were also recorded. The regional progression of the bloom likely began with stronger than normal upwelling along the Iranian and northern Omani coasts during the southwest monsoon in late summer, followed by discharge of unusually warm coastal plume water along the coast of Oman with the reversal of monsoonal winds in late October. The occurrence and persistence of high densities of C. polykrikoides in Oman coastal water were also significantly influenced by an elevated nutrient load and warmer than normal temperatures. Concentrations of nutrients, especially NH4 +, urea, PO4 3-, and organic nitrogen and phosphorus, were manyfold higher than observed in the year prior or since. These findings suggest that mesoscale features were important in bloom dynamics more regionally, but locally the bloom was sustained by nutrient enrichment supplemented by its mixotrophic capabilities.
KW - Cochlodinium polykrikoides
KW - Harmful algal blooms
KW - Noctiluca scintillans
KW - Phytoplankton
KW - Sea of Oman
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U2 - 10.1007/s12237-013-9693-1
DO - 10.1007/s12237-013-9693-1
M3 - Article
AN - SCOPUS:84898058912
SN - 1559-2723
VL - 37
SP - 325
EP - 338
JO - Estuaries and Coasts
JF - Estuaries and Coasts
IS - 2
ER -