Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments
AbstractThe diversity of diazotrophs was studied in the sediment of mangrove forests (Twin Cays, Belize) subjected to a long-term fertilization with nitrogen and phosphorus. Terminal Restriction Fragment Length Polymorphism (TRFLP) and cloning of PCR-amplified nifH genes were combined via in silico analysis to assign clones to TRFLP-nifH phylotypes, as well as to characterize the occurrence of phylotypes in response to environmental conditions. Results indicated that mangrove sediments from Belize harbor a unique diazotrophic community with a low metabolic diversity dominated by sulfate reducers. The variability of potential nitrogen-fixing sulfate reducers was explained by several environmental parameters, primarily by the abundance of dead roots in the sediments, and the concentration of H2S in the pore-waters. This study describes the complexity of microbial communities within the mangrove sediments with specific functional groups varying along environmental gradients. View Full-Text
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Romero, I.C.; Jacobson-Meyers, M.E.; Fuhrman, J.A.; Capone, D.G. Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments. J. Mar. Sci. Eng. 2015, 3, 699-719.
Romero IC, Jacobson-Meyers ME, Fuhrman JA, Capone DG. Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments. Journal of Marine Science and Engineering. 2015; 3(3):699-719.Chicago/Turabian Style
Romero, Isabel C.; Jacobson-Meyers, Myrna E.; Fuhrman, Jed A.; Capone, Douglas G. 2015. "Phylogenetic Diversity of Diazotrophs along an Experimental Nutrient Gradient in Mangrove Sediments." J. Mar. Sci. Eng. 3, no. 3: 699-719.