Temporal and spatial variability of dissolved organic and inorganic phosphorus, and metrics of phosphorus bioavailability in an upwelling-dominated coastal system
Ruttenberg, Kathleen C.
Dyhrman, Sonya T.
MetadataShow full item record
High-frequency temporal and spatial shifts in the various dissolved P pools (total, inorganic, and organic) are linked to upwelling/relaxation events and to phytoplankton bloom dynamics in the upwelling-dominated Oregon coastal system. The presence and regulation of alkaline phosphatase activity (APA) is apparent in the bulk phytoplankton population and in studies of cell-specific APA using Enzyme Labeled Fluorescence (ELF®). Spatial and temporal variability are also evident in phytoplankton community composition and in APA. The spatial pattern of dissolved phosphorus and APA variability can be explained by bottom-controlled patterns of upwelling, and flushing times of different regions within the study area. The presence of APA in eukaryotic taxa indicates that dissolved organic phosphorus (DOP) may contribute to phytoplankton P nutrition in this system, highlighting the need for a more complete understanding of P cycling and bioavailability in the coastal ocean.
Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 110 (2005): C10S13, doi:10.1029/2004JC002837.
Showing items related by title, author, creator and subject.
Sargasso Sea phosphorus biogeochemistry : an important role for dissolved organic phosphorus (DOP) Lomas, Michael W.; Burke, A. L.; Lomas, D. A.; Bell, D. W.; Shen, C.; Dyhrman, Sonya T.; Ammerman, James W. (Copernicus Publications on behalf of the European Geosciences Union, 2010-02-19)Inorganic phosphorus (SRP) concentrations in the subtropical North Atlantic are some of the lowest in the global ocean and have been hypothesized to constrain primary production. Based upon data from several transect cruises ...
Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation Laarkamp, Kirsten L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-09)Phosphorus, an essential nutrient, is removed from the oceans only through burial with marine sediments. Organic phosphorus (Porg) constitutes an important fraction (ca. 25%) of total-P in marine sediments. However, given ...
Orchard, Elizabeth Duncan (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2010-02)Primary producers play a critical role in the oceanic food chain and the global cycling of carbon. The marine diazotroph Trichodesmium is a major contributor to both primary production and nitrogen fixation in the tropical ...