Alkaline phosphatase activity in the phytoplankton communities of Monterey Bay and San Francisco Bay
Nicholson, David P.
Dyhrman, Sonya T.
Chavez, Francisco P.
MetadataShow full item record
Enzyme-labeled fluorescence (ELF) and bulk alkaline phosphatase (AP) activity enzyme assays were used to evaluate the phosphorus (P) status of phytoplankton communities in San Francisco and Monterey bays. Both regions exhibit spatial and temporal variability in bulk AP activity with maximum activities during the early spring and summer periods of high biological productivity. ELF analysis revealed pronounced differences in the makeup of organisms responsible for AP activity in these two environments. In Monterey Bay dinoflagellates are responsible for the bulk of the AP activity. Diatoms infrequently exhibited AP activity. Dinoflagellates that comprised only 14% of all cells counted in Monterey Bay accounted for 78% of AP-producing cells examined. The presence of AP activity in this group suggests that changes in P sources, concentrations, and bioavailability could disproportionably influence this group relative to diatoms in Monterey Bay. In San Francisco Bay, AP production, indicated by ELF, was associated primarily with bacteria attached to suspended particles, potentially used to hydrolyze organic compounds for carbon, rather than to satisfy P requirements. Our results highlight the importance of organic P as a bioavailable nutrient source in marine ecosystems and as a component of the marine P cycle.
Author Posting. © American Society of Limnology and Oceanography, 2006. This is the author's version of the work. It is posted here by permission of American Society of Limnology and Oceanography for personal use, not for redistribution. The definitive version was published in Limnology and Oceanography 51 (2006): 874–883.
Showing items related by title, author, creator and subject.
Stratus Ocean Reference Station (20˚S, 85˚W), mooring recovery and deployment cruise, R/V Ron Brown cruise 04-11, December 5 - December 24, 2004 Colbo, Keir; Weller, Robert A.; Lord, Jeffrey; Smith, Jason C.; Bouchard, Paul R.; Fairall, Christopher W.; Bradley, Frank; Wolfe, Dan; Serpetzoglou, Efthymios; Tomlinson, Jason; Tisandie, Alvaro Gustave Vera; Bustos, Juan Francisco Santibanez (Woods Hole Oceanographic Institution, 2005-05)The Ocean Reference Station at 20° S, 85° W under the stratus clouds west of northern Chile and Peru is being maintained to provide ongoing, climate-quality records of surface meteorology, of air-sea fluxes of heat, ...
Aretxabaleta, Alfredo L.; Blanton, Brian O.; Seim, Harvey E.; Werner, Francisco E.; Nelson, James R.; Chassignet, Eric P. (American Geophysical Union, 2007-05-11)A set of model simulations are used to determine the principal forcing mechanisms that resulted in anomalously cold water in the South Atlantic Bight (SAB) in the summer of 2003. Updated mass field and elevation boundary ...
McGillicuddy, Dennis J.; deYoung, Brad; Doney, Scott C.; Glibert, Patricia M.; Stammer, Detlef; Werner, Francisco E. (Oceanography Society, 2010-09)Through its promotion of coordinated international research programs, the Intergovernmental Oceanographic Commission (IOC) has facilitated major progress on some of the most challenging problems in oceanography. Issues ...