Data/hora: 11/06/2024 15:29:15

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