Data/hora: 09/06/2024 13:27:39

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Nitrate respiration and nitrification in estuarine sediments.
Autores: | Herbert, R.
Data: | 1984-10
Ano: | 1984
Palavras-chave: | Seasonal variations; Bacteria; Estuaries; Sediment chemistry; Biogeochemistry; Ammonia; Nitrates; Nitrogen cycle.
Resumo: | Seasonal data and depth profiles using super(15)N-labelled NO sub(3)u- show that denitrification (77-90% of NO sub(3)u- respired) rather than NO sub(3)u- dissimilation to NH sub(4)u+ was the principal route of nitrate reduction in Kingoodie Bay sediments. Populations of both groups of NO sub(3)u- reducing bacteria were highest in the 0-20 mm horizon in those sediments where highest rates of NO sub(3)u- respiration were recorded (28.56 mu g N.d super(-1) dry wt. sediment super(-1)). Autotrophic nitrification rates shared a marked seasonality with highest rates (0.92 mu g N.d super(-1).g dry wt. sediment super(-1)) occurring during the summer. Maximum populations of autotrophic nitrifying bacteria were also found in the 0-20 mm sediment horizon and these data indicate that both processes occur simultaneously in the oxidised surface sediments.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/1984/acte-971.pdf
Editor: | Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986
Relação: | http://archimer.ifremer.fr/doc/00000/971/
Formato: | application/pdf