Nutrients ocean productivity

Eadie, B.J., McKee, B.A., Lansing, M.B., Robbins, J.A., Metz, S., and Trefrey, J.H. (1994) Records of nutrient-enhanced coastal ocean productivity in sediments from the Louisiana continental shelf. Estuaries 17, 754—765. 

Benner, R., Chin-Leo, G., Gardner, W., Eadie, B., and Comer, J. (1992). The fates and effects of riverine and shelf-derived DOM on Mississippi river plume/Gulf shelf processes. In Proceedings of NECOP (Nutrient Enhanced Coastal Ocean Productivity) Workshop. October 2-4, 1991, Chau-vin, LA. Sponsored by NOAA and LUMCON. pp. 84-94. 

Dortch, Q., Bode, A., and TwiUey, R. R. (1992). Nitrogen uptake and regeneration in surface waters of the Louisiana continental shelf influenced by the Mississippi River. Proceedings of NECOP (Nutrient Enhanced Coastal Ocean Productivity), NOAA, LUMCON. pp. 52—56. 

Because of the importance of diatoms in oceanic productivity, silicon is an important algal nutrient in seawater. A transporter of Si(OH)4 has been isolated and sequenced (Hildebrand et al, 1998 Hildebrand et al, 1997) and the physiology of silicon uptake has been well studied (Martin-Jezequel et al, 2000). Nonetheless, the molecular mechanism of Si(OH)4 transport and silica fmstule formation in diatoms are still largely mysterious. From indirect evidence, it appears possible that the Si(OH)4 transporter may contain zinc, coordinated to cysteines, as a metal center in the portion of the protein exposed to the outside of the cell (Hildebrand, 2000 Rueter and Morel, 1981). If true, this would be an unusual example of a transport protein functioning with a metal center. 

Ortner, P.B. Dagg, M.J. (1995) Nutrient-enhanced coastal ocean productivity explored in the Gulf of Mexico, EOS, Transact. Amer. Geophs. Union 76, 98-109. 

Oceans, despite their much larger surface area, contribute much less than half of the global NPP. The reason is related to highly nutrient deficiency in surface waters, which limits the photosynthesis process. Oceanic production is mainly concentrated... 

The quantity of primary production that is exported from the upper ocean is said to be equivalent to new production (18, 19) New primary production is that associated with allocthonous nutrients (i.e., those upwelled or mixed into the euphotic zone or input via rivers and rain). In order for steady state to be maintained, an equivalent flux out of the euphotic zone is required. Earlier studies (19) suggested that sediment-trap measurements of particulate organic carbon (POC) flux were equivalent to new primary production however, recently it has become clear that these measurements probably represent only a... 

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