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  • 1
    Electronic Resource
    Electronic Resource
    Stimulation of grassland nitrogen cycling under carbon dioxide enrichment (1996)
    Springer
    Oecologia 109 (1996), S. 149-153 
    Details
    ISSN: 1432-1939
    Keywords: Key words N mineralization ; Elevated CO2 ; Annual grasslands ; Soil moisture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Nitrogen (N) limits plant growth in many terrestrial ecosystems, potentially constraining terrestrial ecosystem response to elevated CO2. In this study, elevated CO2 stimulated gross N mineralization and plant N uptake in two annual grasslands. In contrast to other studies that have invoked increased C input to soil as the mechanism altering soil N cycling in response to elevated CO2, increased soil moisture, due to decreased plant transpiration in elevated CO2, best explains the changes we observed. This study suggests that atmospheric CO2 concentration may influence ecosystem biogeochemistry through plant control of soil moisture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050069
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Leaf carbon isotope and mineral composition in subtropical plants along an irradiance cline (1986)
    Springer
    Oecologia 70 (1986), S. 520-526 
    Details
    ISSN: 1432-1939
    Keywords: Water-use efficiency ; Nutrient-use efficiency ; Photosynthesis ; Human impact ; 13C/12C ratios
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Leaf carbon isotope ratios and leaf mineral composition (Ca, K, Mg, Mn, N, and P) were measured on the dominant species along an irradiance cline in a subtropical monsoon forest of southern China. This irradiance cline resulted from disturbance caused by fuel-harvesting. Leaf carbon isotope ratios increased from undisturbed to disturbed sites for all species, indicating that leaf intercellular CO2 concentrations decreased and leaf water use efficiencies increased along this cline. Nitrogen and magnesium levels were lower in leaves of species on the disturbed sites, but there were no clear patterns for calcium, potassium, phosphorus or manganese.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379898
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    Paper (German National Licenses)
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