Low marine sulphate and protracted oxygenation of the Proterozoic biosphere
Article Abstract:
A report based on large stratigraphic variations in the sulphur isotope composition of marine carbonate-associated sulphate, and use a rate-dependent model for sulphur isotope change that allows us to track changes in marine sulphate concentrations throughout the Proterozoic is discussed. Our calculations indicate sulphate levels between 1.5 and 4.5 mM, or 5-15 percent of modern values for more than one Gyr after initial oxygenation of the earth's biosphere.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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Similar response of labile and resistant soil organic matter pools to changes in temperature
Article Abstract:
The belief in 2005 indicates that the disintegration of soil labile carbon is responsive to the changes in temperatures whilst the opposing components are not responsive. Furthermore, it specifies that soil organic matter (SOM) disintegrates or soil basal respiration rate is substantially influenced by the alterations in the SOM components related with depth of soil, sampling method and the time required for incubation.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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