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.
Suggested CitationPreprint: Nelson, James A., Stallings, Christopher D., Landing, William M., Chanton, Jeffrey P., "Biomass transfer subsidizes nitrogen to offshore food webs", 2013-03-17, https://doi.org/10.1007/s10021-013-9672-1, https://hdl.handle.net/1912/6224
Showing items related by title, author, creator and subject.
Satellite observations of chlorophyll, phytoplankton biomass, and Ekman pumping in nonlinear mesoscale eddies Gaube, Peter; Chelton, Dudley B.; Strutton, Peter G.; Behrenfeld, Michael J. (John Wiley & Sons, 2013-12-02)Nonlinear mesoscale eddies can influence biogeochemical cycles in the upper ocean through vertical and horizontal advection of nutrients and marine organisms. The relative importance of these two processes depends on the ...
Zooplankton biomass and related MOCNESS data for tows taken on the 1981-82 warm-core rings cruises Barber, Valerie A.; Wiebe, Peter H. (Woods Hole Oceanographic Institution, 1985-01)Compiled in this report are tables of zooplankton biomass data (displacement volume), carbon equivalents, and associated net tow data (volume filtered, depth, temperature, and salinity) collected with a Multlple ...
Decreased mass specific respiration under experimental warming is robust to the microbial biomass method employed Bradford, Mark A.; Wallenstein, Matthew D.; Allison, Steven D.; Treseder, Kathleen K.; Frey, Serita D.; Watts, Brian W.; Davies, Christian A.; Maddox, Thomas R.; Melillo, Jerry M.; Mohan, Jacqueline E.; Reynolds, James F. (2009-05)Hartley et al. question whether reduction in Rmass, under experimental warming, arises because of the biomass method. We show the method they treat as independent yields the same result. We describe why the substrate-depletion ...