Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (2) Autor Aminot, Alain (1) Fontugne, M (1) Ikehara, Minoru (1) Kerouel, Roger (1) Max, Lars (1) Naulet, N (1) Nuernberg, Dirk (1) Riethdorf, Jan-rainer (1) Savoye, N (1) Thibodeau, Benoit (1) Tiedemann, Ralf (1) Treguer, Paul (1) Yokoyama, Yusuke (1) Mais... Palavra-chave Nitrate utilization (2) Bay of Seine (1) Bering Sea (1) C and N stable isotopes (1) Coastal ecosystem (1) Nitrogen isotopes (1) Phytoplankton (1) Quaternary (1) Mais... Tipo do documento Text (2) Ano 2016 (1) 2003 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Dynamics of particulate organic matter delta N-15 and delta C-13 during spring phytoplankton blooms in a macrotidal ecosystem (Bay of Seine, France) ArchiMer Savoye, N; Aminot, Alain; Treguer, Paul; Fontugne, M; Naulet, N; Kerouel, Roger. Two cruises (April and June 1997) were carried out in the Bay of Seine, a nitrate- and ammonium-enriched ecosystem of Western Europe, to identify the major mechanisms that control delta(15)N and VC in spring particulate organic matter (POM). Particulate organic nitrogen (PON) delta(15)N ranged between 0.8 and 5.2parts per thousand in April and between 2.2 and 6.2parts per thousand in June, while particulate organic carbon (POC) delta(13)C ranged between -24.3 and -19.7parts per thousand, and between -20.0 and -16.2parts per thousand during the same periods. During spring 1997, POM was highly dominated by autochthonous phytoplankton. It is shown that the variation of PON delta(15)N is due to both nitrate mixing between river and marine waters and... Tipo: Text Palavras-chave: C and N stable isotopes; Phytoplankton; Coastal ecosystem; Nitrate utilization; Bay of Seine. Ano: 2003 URL: http://archimer.ifremer.fr/doc/00000/10645/7593.pdf Surface nitrate utilization in the Bering sea since 180 kA BP: Insight from sedimentary nitrogen isotopes ArchiMer Riethdorf, Jan-rainer; Thibodeau, Benoit; Ikehara, Minoru; Nuernberg, Dirk; Max, Lars; Tiedemann, Ralf; Yokoyama, Yusuke. We present high-resolution records of sedimentary nitrogen (delta N-15(bulk)) and carbon isotope ratios (delta C-13(bulk)) from piston core S0201-2-85KL located in the western Bering Sea. The records reflect changes in surface nitrate utilization and terrestrial organic matter contribution in submillennial resolution that span the last 180 kyr. The delta N-15(bulk) record is characterized by a minimum during the penultimate interglacial indicating low nitrate utilization (similar to 62-80%) despite the relatively high export production inferred from opal concentrations along with a significant reduction in the terrestrial organic matter fraction (m(terr)). This suggests that the consumption of the nitrate pool at our site was incomplete and even more... Tipo: Text Palavras-chave: Bering Sea; Quaternary; Nitrogen isotopes; Nitrate utilization. Ano: 2016 URL: https://archimer.ifremer.fr/doc/00421/53261/83376.pdf Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco