Isotope baseline shifts in pelagic food webs of the Gulf of Mexico

Diazotrophic inputs byTrichodesmiumhave been shown to support production in tropical and subtropical marine environments, but the importance ofTrichodesmiumin the Gulf of Mexico has not been widely investigated. Here, we use stable carbon (δ13C) and nitrogen (δ15N) isotopes to determine whether diaz...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2012-09, Vol.464, p.37-49
Main Authors: Dorado, Samuel, Rooker, Jay R., Wissel, Björn, Quigg, Antonietta
Format: Article
Language:English
Subjects:
Food webs
Fresh water
Gulfs
Isotopes
Marine
Nitrogen
Nitrogen fixation
Nitrogen isotopes
Phytoplankton
Sea water
Zooplankton
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Summary:Diazotrophic inputs byTrichodesmiumhave been shown to support production in tropical and subtropical marine environments, but the importance ofTrichodesmiumin the Gulf of Mexico has not been widely investigated. Here, we use stable carbon (δ13C) and nitrogen (δ15N) isotopes to determine whether diazotrophy impacts the isotope baselines of pelagic food webs in the northern Gulf of Mexico. Phytoplankton (measured as particulate organic matter),Trichodesmium, and zooplankton were collected from neritic and oceanic environments (salinity
ISSN:0171-8630
1616-1599
DOI:10.3354/meps09854