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  • 1
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    Organic matter stoichiometry, flux, and oxygen control nitrogen loss in the ocean (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-04-26
    Description: Biologically available nitrogen limits photosynthesis in much of the world ocean. Organic matter (OM) stoichiometry had been thought to control the balance between the two major nitrogen removal pathways-denitrification and anammox-but the expected proportion of 30% anammox derived from mean oceanic OM is rarely observed in the environment. With incubations designed to directly test the effects of stoichiometry, however, we showed that the ratio of anammox to denitrification depends on the stoichiometry of OM supply, as predicted. Furthermore, observed rates of nitrogen loss increase with the magnitude of OM supply. The variable ratios between denitrification and anammox previously observed in the ocean are thus attributable to localized variations in OM quality and quantity and do not necessitate a revision to the global nitrogen cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Babbin, Andrew R -- Keil, Richard G -- Devol, Allan H -- Ward, Bess B -- New York, N.Y. -- Science. 2014 Apr 25;344(6182):406-8. doi: 10.1126/science.1248364. Epub 2014 Apr 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geosciences, Princeton University, Guyot Hall, Princeton, NJ 08544, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24763588" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonium Compounds/analysis/metabolism ; Anaerobiosis ; Bacteria/metabolism ; Denitrification ; Nitrites/analysis/metabolism ; Nitrogen/*analysis/metabolism ; Nitrogen Cycle ; Oceans and Seas ; Oxidation-Reduction ; Oxygen/*analysis/metabolism ; *Seawater/chemistry/microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Chemical changes of lakes within the mount st. Helens blast zone (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-09
    Description: Differences in the dissolved chemistry of lakes devastated by the 18 May 1980 eruption of Mount St. Helens are attributable to location relative to the lateral blast trajectory of the eruption and to the emplacement of mineral deposits. Elemental enrichment ratios of pre- and posteruption measurements for Spirit Lake and comparisons of the chemical concentrations and elemental ratios for lakes inside and outside the blast zone reflect the influences of the dissolution of magmatic and lithic deposits. The pH changes were minor because of buffering by carbonic acid and reactions involving mineral alteration, dissolved organics, and biological processes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wissmar, R C -- Devol, A H -- Nevissi, A E -- Sedell, J R -- New York, N.Y. -- Science. 1982 Apr 9;216(4542):175-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17736248" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Biological responses of lakes in the mount st. Helens blast zone (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-04-09
    Description: Loadings of dissolved organics and suspended particulates from destroyed forests and volcanic debris produced by the 18 May 1980 eruption of Mount St. Helens altered the trophic structure of many blast zone lakes to the extent that anoxic conditions and chemoorganotrophic and chemolithotrophic microorganisms prevailed. High bacterial counts and high adenosine triphosphate concentrations were directly related to enhanced concentrations of dissolved organic carbon, and plankton chlorophyll a was inversely related to light extinction. The recovery of these lakes to the preeruption state appears dependent upon the oxidation of organics and the stabilization of watersheds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wissmar, R C -- Devol, A H -- Staley, J T -- Sedell, J R -- New York, N.Y. -- Science. 1982 Apr 9;216(4542):178-81.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17736249" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Carbon flow in four lake ecosystems: a structural approach (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-12-15
    Description: Direct and indirect carbon fluxes in lakes Marion (British Columbia), Findley (Washington), Wingra (Wisconsin), and Mirror (New Hampshire) are compared, using budgets and input-output analysis. Overall differences in carbon flow between the lakes are shown with cycling indices of .031, .108, .572, and .661, respectively. The results suggest that lake ecosystems may be considered unique aggregatins of similar components.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richey, J E -- Wissmar, R C -- Devol, A H -- Likens, G E -- Eaton, J S -- Wetzel, R G -- Odum, W E -- Johnson, N M -- Loucks, O L -- Prentki, R T -- Rich, P H -- New York, N.Y. -- Science. 1978 Dec 15;202(4373):1183-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17735402" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Organic carbon-14 in the Amazon river system (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-03-07
    Description: Coarse and fine suspended particulate organic materials and dissolved humic and fulvic acids transported by the Amazon River all contain bomb-produced carbon-14, indicating relatively rapid turnover of the parent carbon pools. However, the carbon-14 contents of these coexisting carbon forms are measurably different and may reflect varying degrees of retention by soils in the drainage basin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hedges, J I -- Ertel, J R -- Quay, P D -- Grootes, P M -- Richey, J E -- Devol, A H -- Farwell, G W -- Schmidt, F W -- Salati, E -- New York, N.Y. -- Science. 1986 Mar 7;231(4742):1129-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17818540" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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