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Trichodesmium, a Globally Significant Marine Cyanobacterium
N2 fixation by Trichodesmium is likely a major input to the marine and global nitrogen cycle. Expand
Nitrogen fixation by Trichodesmium spp.: An important source of new nitrogen to the tropical and subtropical North Atlantic Ocean
Results from 154 stations on six research cruises in the North Atlantic Ocean show depth-integrated N2 fixation by Trichodesmium spp. Expand
Nitrogen Fixation and Nitrogen Isotope Abundances in Zooplankton of the Oligotrophic North Atlantic
Deep-water nitrate is a major reservoir of oceanic combined nitrogen and has long been considered to be the major source of new nitrogen supporting primary production in the oligotrophic ocean.Expand
Phosphorus limitation of nitrogen fixation by Trichodesmium in the central Atlantic Ocean
Nitrogen fixation rates in the central Atlantic appear to be independent of both dissolved iron levels in sea water and iron content in Trichodesmium colonies, and the structural iron requirement for the growth of nitrogen-fixing organisms is much lower than previously calculated. Expand
Dinitrogen fixation in the world's oceans
The surface water of themarine environment has traditionally beenviewed as a nitrogen (N) limited habitat, andthis has guided the development of conceptualbiogeochemical models focusing largely onExpand
Polystyrene Spherules in Coastal Waters
White, opaque spherules are selectively consumed by 8 species of fish out of 14 species examined, and a chaetognath, and ingestion of the plastic may lead to intestinal blockage in smaller fish. Expand
Bacterial Activity in South Pole Snow
Large populations of bacteria were present in surface snow and firn from the south pole sampled in January 1999 and 2000 and DNA isolated from this snow yielded ribosomal DNA sequences similar to those of several psychrophilic bacteria and a bacterium which aligns closely with members of the genus Deinococcus. Expand
Extensive bloom of a N2-fixing diatom/cyanobacterial association in the tropical Atlantic Ocean
The bloom was spatially extensive, as revealed by satellite imagery, and is calculated to have contributed about 0.5 Tg N to the euphotic zone, demonstrating that heterocystous cyanobacteria can also make quantitatively important contributions of N in oceanic water column environments. Expand
Biogeochemical tracers of the marine cyanobacterium Trichodesmium
The results support the supposition that the relatively low σ15N and high σ13C values observed in suspended and sediment-trapped material from some tropical and subtropical seas result from substantial input of C and N by Trichodesmium. Expand