Phosphonate utilization by the globally important marine diazotroph Trichodesmium
Article Abstract:
The factors that control the growth and nitrogen fixation rates of marine diazotrophs such as Trichodesmium is intensively studied because of the role that these processes have in the global cycling of carbon and nitrogen, and in the sequestration of carbon to the deep sea. Because the phosphate concentrations of many ocean gyres are low, the bioavailability of the larger, chemically heterogeneous pool of dissolved organic phosphorus could markedly influence Trichodesmium physiology.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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A bigger nitrogen fix
Article Abstract:
Biological nitrogen fixation is substantial over large regions of the tropical and subtropical Atlantic and it provides the ecosystem of the illuminated ocean with a source of nitrogen that rivals the vertical supply of nitrate. The contribution of Trichodesmium, a cyanobacterium cements a paradigm shift that is occurring over the past few years in models of marine nitrogen cycling.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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Temperature excludes N2-fixing heterocystous cyanobacteria in the tropical oceans
Article Abstract:
Trichodesmium is capable of N2 fixation, apparently without needing to differentiate heterocysts. The differences in the temperature dependence of O2 flux, respiration and N2 fixation activity explains how Trichodesmium performs better than heterocystous species at higher temperatures.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
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