Modelling the pelagic nitrogen cycle and vertical particle flux in the Norwegian sea

Haupt, Olaf; Wolf, Uli; Bodungen, Bodo von

doi:10.1016/s0924-7963(98)00090-6

Cited by 11 publications

(8 citation statements)

References 66 publications

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“…Previous data suggest that in some years Norwegian Sea nitrate concentrations never reach limiting levels, while in other years nitrate is fully depleted but not until later in summer (Kohly, 1998;Dale et al, 1999;Haupt et al, 1999) (Fig. 4).…”

Section: Nitratementioning

confidence: 78%

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Carbon and nutrient mixed layer dynamics in the Norwegian Sea

et al. 2008

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Abstract.A coupled carbon-ecosystem model is compared to recent data from Ocean Weather Station M (66 • N, 02 • E) and used as a tool to investigate nutrient and carbon processes within the Norwegian Sea. Nitrate is consumed by phytoplankton in the surface layers over the summer; however the data show that silicate does not become rapidly limiting for diatoms, in contrast to the model prediction and in contrast to data from other temperate locations. The model estimates atmosphere-ocean CO 2 flux to be 37 g C m −2 yr −1 . The seasonal cycle of the carbonate system at OWS M resembles the cycles suggested by data from other high-latitude ocean locations. The seasonal cycles of calcite saturation state and [CO 2− 3 ] are similar in the model and in data at OWS M: values range from ∼3 and ∼120 µmol kg −1 respectively in winter, to ∼4 and ∼170 µmol kg −1 respectively in summer. The model and data provide further evidence (supporting previous modelling work) that the summer is a time of high saturation state within the annual cycle at high-latitude locations. This is also the time of year that coccolithophore blooms occur at high latitudes.

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Section: Nitratementioning

confidence: 78%

“…Interannual variations in observations give a range of nitrate summer concentrations between near 0 µmol L −1 and 2 µmol L −1 (Kohly, 1998;Haupt et al, 1999, Dale et al, 1999. The lack of full depletion of nitrate in summer at both OWS M and at (60 • N, 20 • W) in the North Atlantic, compared to other temperate sites (e.g.…”

Section: Are Reduced To Lowmentioning

confidence: 96%

Carbon and nutrient mixed layer dynamics in the Norwegian Sea

et al. 2008

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“…Despite the importance of bacterial assimilation of NO 3 -to the introduction of organic N into the microbial food web and to geochemical mass balances, it is a process that has received very little attention in models of pelagic C and N fluxes (Fasham et al 1990, Boynton et al 1995, Haupt et al 1999, Olivieri & Chavez 2000, Dadou et al 2001.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Influence of nitrate availability on the distribution and abundance of heterotrophic bacterial nitrate assimilation genes in the Barents Sea during summer

Allen

Booth²,

Verity³

et al. 2005

Aquat. Microb. Ecol.

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“…The primary role of heterotrophic bacteria is classically considered to be the decomposition and mineralization of dissolved and particulate organic nitrogen (27). Bacterial NO 3 Ϫ assimilation is not a pathway currently considered in pelagic carbon and nitrogen cycle models (1,6,10). A recent review of freshwater and marine studies, however, reported that bacteria may rely on both NH 4 ϩ and NO 3 Ϫ for growth and biomass synthesis, and overall they may be significant consumers of inorganic N; mean consumption values of 30 and 40% have been reported for NH 4 ϩ and NO 3 Ϫ , respectively (14).…”

Section: The Importance Of Inorganic N (Nhmentioning

confidence: 99%

Diversity and Detection of Nitrate Assimilation Genes in Marine Bacteria

Allen

Booth

Frischer

et al. 2001

Appl Environ Microbiol

113

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A PCR approach was used to construct a database of nasA genes (called narB genes in cyanobacteria) and to detect the genetic potential for heterotrophic bacterial nitrate utilization in marine environments. A nasA-specific PCR primer set that could be used to selectively amplify the nasA gene from heterotrophic bacteria was designed. Using seawater DNA extracts obtained from microbial communities in the South Atlantic Bight, the Barents Sea, and the North Pacific Gyre, we PCR amplified and sequenced nasA genes. Our results indicate that several groups of heterotrophic bacterial nasA genes are common and widely distributed in oceanic environments.

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Modelling the pelagic nitrogen cycle and vertical particle flux in the Norwegian sea

Cited by 11 publications

References 66 publications

Carbon and nutrient mixed layer dynamics in the Norwegian Sea

Carbon and nutrient mixed layer dynamics in the Norwegian Sea

Influence of nitrate availability on the distribution and abundance of heterotrophic bacterial nitrate assimilation genes in the Barents Sea during summer

Diversity and Detection of Nitrate Assimilation Genes in Marine Bacteria

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