Biomass transfer subsidizes nitrogen to offshore food webs
Nelson, James A.
Stallings, Christopher D.
Landing, William M.
Chanton, Jeffrey P.
MetadataShow full item record
We evaluated the potential contribution of allochthonous biomass subsidies to the upper trophic levels of offshore food webs in the northeastern Gulf of Mexico (GOM). We made this evaluation considering nitrogen, an essential and often limiting nutrient in coastal ecosystems, to estimate the potential production of within-ecosystem biomass relative to the known import of biomass from an adjacent seagrass dominated ecosystem. When adjusted for trophic transfer efficiency, we found the biomass subsidy from a single species (pinfish, Lagodon rhomboides) from neashore seagrass habitat to the offshore GOM to be greater than the amount of nitrogen exported by a two major rivers and local submarine ground water discharge. Our calculations show that seagrass-derived biomass accounts for ~25% of the total potential production in the northeastern GOM. This estimate is in agreement with a previous study that found 18.5-25% of the biomass in a predatory reef fish was derived from seagrass biomass inputs. These results indicate that all of the sources we consider account for the majority of the nitrogen available to the food web in the northeastern GOM. Our approach could be adapted to other coupled ecosystems to determine the relative importance of biomass subsidies to coastal ocean food 48 webs.
Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Ecosystems 16 (2013): 1130-1138, doi:10.1007/s10021-013-9672-1.
Showing items related by title, author, creator and subject.
Rosenberg, Andrew A.; Bolster, W. Jeffrey; Alexander, Karen E.; Leavenworth, William B.; Cooper, Andrew B.; McKenzie, Matthew G. (Ecological Society of America, 2005-03)Managing the remnants of the ocean's resources is a critical issue worldwide, but evidence for what constitutes a healthy fish population remains controversial. Here, we use historical sources to understand ecosystem trends ...
Friedland, Kevin D.; Leaf, Robert T.; Kane, Joe; Tommasi, Desiree; Asch, Rebecca G.; Rebuck, Nathan D.; Ji, Rubao; Large, Scott I.; Stock, Charles A.; Saba, Vincent S. (Elsevier, 2015-04-07)The spring phytoplankton bloom on the US Northeast Continental Shelf is a feature of the ecosystem production cycle that varies annually in timing, spatial extent, and magnitude. To quantify this variability, we analyzed ...
Benthic foraminifera living in Gulf of Mexico bathyal and abyssal sediments : community analysis and comparison to metazoan meiofaunal biomass and density Bernhard, Joan M.; Sen Gupta, Barun K.; Baguley, Jeffrey G. (2005-12-07)Benthic foraminiferal biomass, density, and species composition were determined at ten sites in the Gulf of Mexico. During June 2001 and June 2002, sediment samples were collected with a GoMex boxcorer. A 7.5-cm diameter ...