Salt marshes nitrification

DoUhopf, S. L., Hyun,. H., Smith, A. C., Adams, H.., O Brien, S., and Kostka,. E. (2005). Quantification of ammonia-oxidizing bacteria and factors controfling nitrification in salt marsh sediments. Applied and Environmental Microbiology 71, 240-246. 

Ericksson, P. G., Svensson, J. M., and Carrer, G. M. (2003). Temporal changes and spatial variation of soil oxygen consumption, nitrification, and denitrification rates in a tidal salt marsh of the Lagoon of Venice, Italy. Estuar. Coast. Shelf. Sci. 58, 861—871. 

DNRA has been identified as an important process under some conditions in estuarine sediments (Koike and Sorensen, 1988) Relatively few studies have been conducted in salt marshes. Abd Aziz and NedweU (1986) could not measure the release of labeled nitrate as N2 gas and concluded DNRA must greatly exceed denitrification. Tuerk and Aefion (2005) found that more than 30% of nitrate added to marsh sediments was quickly converted to ammonium. Tobias et al. (2001b) measured the relative importance of nitrate reduction to a marsh-aquifer ecotone and found that when groundwater discharge was low, nitrification rates were also low and the majority of the nitrate produced was denitrified. During high... 

Thompson, W., Paerl, H., and Go, M. (1995). Seasonal patterns of nitrification and denitrification in a natural and a restored salt marsh. Estuaries 18, 399—408. 

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