scholarly journals Community Composition of Nitrous Oxide-Related Genes in Salt Marsh Sediments Exposed to Nitrogen Enrichment

2018 ◽  
Vol 9 ◽  
Author(s):  
John H. Angell ◽  
Xuefeng Peng ◽  
Qixing Ji ◽  
Ian Craick ◽  
Amal Jayakumar ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Salt Marsh ◽  
Community Composition ◽  
Nitrogen Enrichment ◽  
Marsh Sediments ◽  
Salt Marsh Sediments

Long-Term Fertilization Alters Nitrous Oxide Cycling Dynamics in Salt Marsh Sediments

2021 ◽  
Author(s):  
Xuefeng Peng ◽  
Qixing Ji ◽  
John H. Angell ◽  
Patrick J. Kearns ◽  
Jennifer L. Bowen ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Salt Marsh ◽  
Marsh Sediments ◽  
Salt Marsh Sediments

scholarly journals Microbial Community Composition and Denitrifying Enzyme Activities in Salt Marsh Sediments

2008 ◽  
Vol 74 (24) ◽  
pp. 7585-7595 ◽  
Author(s):  
Yiping Cao ◽  
Peter G. Green ◽  
Patricia A. Holden
Keyword(s):  
Microbial Community ◽  
Salt Marsh ◽  
Carbon Content ◽  
Community Composition ◽  
Enzyme Activities ◽  
Nutrient Loading ◽  
Microbial Community Composition ◽  
Marsh Sediments ◽  
Salt Marsh Sediments ◽  
And Function

ABSTRACT Denitrifying microbial communities and denitrification in salt marsh sediments may be affected by many factors, including environmental conditions, nutrient availability, and levels of pollutants. The objective of this study was to examine how microbial community composition and denitrification enzyme activities (DEA) at a California salt marsh with high nutrient loading vary with such factors. Sediments were sampled from three elevations, each with different inundation and vegetation patterns, across 12 stations representing various salinity and nutrient conditions. Analyses included determination of cell abundance, total and denitrifier community compositions (by terminal restriction fragment length polymorphism), DEA, nutrients, and eluted metals. Total bacterial (16S rRNA) and denitrifier (nirS) community compositions and DEA were analyzed for their relationships to environmental variables and metal concentrations via multivariate direct gradient and regression analyses, respectively. Community composition and DEA were highly variable within the dynamic salt marsh system, but each was strongly affected by elevation (i.e., degree of inundation) and carbon content as well as by selected metals. Carbon content was highly related to elevation, and the relationships between DEA and carbon content were found to be elevation specific when evaluated across the entire marsh. There were also lateral gradients in the marsh, as evidenced by an even stronger association between community composition and elevation for a marsh subsystem. Lastly, though correlated with similar environmental factors and selected metals, denitrifier community composition and function appeared uncoupled in the marsh.

Polychlorinated biphenyls in two salt marsh sediments of the Venice Lagoon

2010 ◽  
Vol 181 (1-4) ◽  
pp. 243-254 ◽  
Author(s):  
Cristian Mugnai ◽  
Silvia Giuliani ◽  
Luca G. Bellucci ◽  
Claudio Carraro ◽  
Maurizio Favotto ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Polychlorinated Biphenyls ◽  
Venice Lagoon ◽  
Marsh Sediments ◽  
Salt Marsh Sediments
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