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Berlin Brandenburg

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  • 1
    Language: English
    In: Journal of Soil and Water Conservation, Nov-Dec, 2007, Vol.62(6), p.139A(5)
    Description: Role of soil in causing global warming is discussed. Soils are major players in the carbon cycle. Soils contain the equivalent of about 300 times the amount of carbon now released annually through the burning of fossil fuels. In many soils, carbon stocks contain large amounts of nitrogen, whose metabolism by microorganisms can also contribute to greenhouse gas emissions. It is shown that small changes of the amount of carbon contained in soils may lead to sources or sinks of greenhouse gases. Increased release of carbon by world soils can drastically exacerbate atmospheric carbon dioxide (CO sub(2)) levels, leading to accelerated global warming and to a positive feedback mechanism that may cause climate change to get completely out of hand.
    Keywords: Air Pollution -- Social Aspects ; Air Pollution -- Control ; Global Warming -- Influence ; Soil Ecology -- Research ; Soil Chemistry -- Research
    ISSN: 0022-4561
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  • 2
    Language: English
    In: Environmental Science & Technology, 09/2007, Vol.41(18), pp.6343-6349
    Description: The response of microorganisms to metal contamination of soils varies significantly from one investigation to another. One explanation is that metals are heterogeneously distributed at spatial scales relevant to microbes and that microoorganisms are able to avoid zones of intense contamination. This article aims to assess the microscale distribution of Cu in a vineyard soil. The spatial distribution of Cu was measured at two resolutions (0.3 mm and 20 mm) in thin sections of the surface 4 cm of undisturbed soil by electron microprobe and synchrotron X-ray microfluorescence spectroscopy. Bulk physicochemical analyses of Cu, pH, organic matter, texture, and mineralogy were performed. The results indicate that the Cu distribution is strongly heterogeneous at both scales of observation. Entire regions of the thin sections are virtually devoid of Cu, whereas highly localized "hotspots" have Cu signal intensities thousands of times higher than background. The distribution of Rb, or Al and Si, indicators of clay minerals, or Fe (iron (hydr)oxides), show that Cu is not preferentially associated with these mineral phases. Instead, Cu hotspots are associated with particulate organic matter. These observations suggest modification of current sampling protocols, and design of ecotoxicological experiments involving microorganisms, for contaminated soils.
    Keywords: Vineyards ; Fluorescence ; Spatial Distribution ; Contamination ; Heavy Metals ; Hot Spots ; Organic Matter ; Electron Microprobe ; Retinoblastoma Protein ; Copper ; Spectroscopy ; Clays ; Soil Microorganisms ; Soil ; Soil Pollution ; Particulate Organic Matter ; Ionizing Radiation ; Microorganisms ; Mapping ; Sampling ; Ph Effects ; Iron ; Minerals ; Hot Spots ; Metals ; Clay ; Fluorescence ; Organic Matter ; Soil Contamination ; Particulates ; Mineralogy ; Spatial Distribution ; Vineyards ; Microorganisms ; Minerals ; Iron ; Land Pollution ; Antibiotics & Antimicrobials;
    ISSN: 0013-936X
    E-ISSN: 1520-5851
    Source: American Chemical Society (via CrossRef)
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  • 3
    Language: English
    In: Environmental Science & Technology, 15 September 2007, Vol.41(18), pp.6343-6349
    Description: The response of microorganisms to metal contamination of soils varies significantly from one investigation to another. One explanation is that metals are heterogeneously distributed at spatial scales relevant to microbes and that microoorganisms...
    Keywords: Sciences of the Universe ; Continental Interfaces, Environment ; Environmental Sciences ; Global Changes ; Sciences of the Universe ; Earth Sciences ; Geochemistry ; Environmental Sciences ; Global Changes ; Domain_Sde.Mcg.Sic ; Environmental Sciences ; Global Changes ; Domain_Sde.Mcg.Cpe ; Engineering ; Environmental Sciences
    ISSN: 0013-936X
    E-ISSN: 1520-5851
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  • 4
    Language: English
    In: Environmental Science & Technology, 01 December 2007, Vol.41(23), pp.8056-8061
    Description: The fate of organic herbicides applied to agricultural fields may be affected by other soil amendments, such as copper applied as a fungicide. The effect of copper on the leaching of diuron and glyphosate through a granitic and a calcareous soil was studied in the laboratory using sieved-soil...
    Keywords: Adsorption ; Copper ; Diuron ; Drug Interactions ; Environmental Monitoring ; Glycine ; Herbicides ; Protons ; Soil ; Soil Pollutants ; Life Sciences ; Agricultural Sciences ; Soil Study ; Sciences of the Universe ; Continental Interfaces, Environment ; Environmental Sciences ; Global Changes ; Sciences of the Universe ; Earth Sciences ; Geochemistry ; Engineering ; Environmental Sciences
    ISSN: 0013-936X
    E-ISSN: 1520-5851
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  • 5
    Language: English
    Keywords: Sciences of the Universe ; Continental Interfaces, Environment ; Environmental Sciences ; Global Changes ; Environmental Sciences ; Global Changes ; Domain_Sde.Mcg.Sic ; Environmental Sciences
    Source: Hyper Article en Ligne (CCSd)
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