Response of atmospheric methane consumption by maine forest soils to exogenous aluminum salts.
K. Nanba,Gary M. King +1 more
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TLDR
The results suggest that widespread acidification of soils and aluminum mobilization due to acid precipitation may exacerbate inhibition of atmospheric methane consumption due to changes in other parameters and increase the contribution of methane to global warming.Abstract:
Atmospheric methane consumption by Maine forest soils was inhibited by additions of environmentally relevant levels of aluminum. Aluminum chloride was more inhibitory than nitrate or sulfate salts, but its effect was comparable to that of a chelated form of aluminum. Inhibition could be explained in part by the lower soil pH values which resulted from aluminum addition. However, significantly greater inhibition by aluminum than by mineral acids at equivalent soil pH values indicated that inhibition also resulted from direct effects of aluminum per se. The extent of inhibition by exogenous aluminum increased with increasing methane concentration for soils incubated in vitro. At methane concentrations of >10 ppm, inhibition could be observed when aluminum chloride was added at concentrations as low as 10 nmol g (fresh weight) of soil−1. These results suggest that widespread acidification of soils and aluminum mobilization due to acid precipitation may exacerbate inhibition of atmospheric methane consumption due to changes in other parameters and increase the contribution of methane to global warming.read more
Citations
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TURNER REVIEW No. 18. Greenhouse gas fluxes from natural ecosystems
Ram C. Dalal,D. E. Allen +1 more
TL;DR: The impact of increasing N deposition on natural ecosystems is poorly understood, and further understanding is required regarding the use of drainage as a management tool, to reduce CH4 emissions from wetlands and to increase GHG sink from the restoration of degraded lands, including saline and sodic soils.
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Methane uptake responses to nitrogen deposition in three tropical forests in southern China
Wei Zhang,Jiangming Mo,Guoyi Zhou,Per Gundersen,Yunting Fang,Xiankai Lu,Tao Zhang,Shaofeng Dong +7 more
TL;DR: In this article, simulated nitrogen deposition in a mature forest, a rehabilitated forest, and a disturbed forest in tropical China were studied, and the results suggest that the response of soil CH4 uptake to N deposition in tropical forests may vary depending on the soil N status directly, and on land-use history of the forest indirectly.
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Increased phosphorus availability mitigates the inhibition of nitrogen deposition on CH 4 uptake in an old-growth tropical forest, southern China
TL;DR: In this paper, the effects of N and P additions on soil CH4 uptake in an N saturated old-growth tropical forest in southern China to test the following hypotheses: (1) P addition would increase CH4 usage; (2) N addition would decrease CH4 consumption; and (3) PA addition would mitigate the inhibitive effect of N addition on soilCH4 uptake.
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Environmental Determinants of Soil Methane Oxidation and Methanotrophs
TL;DR: In this article, the authors classified the methanotrophs into two types, low affinity group and high affinity group, and classified them as Type I and Type II belonging to α-Proteobacteria, respectively.
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Toxicity of Al to Desulfovibrio desulfuricans
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References
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Methane Consumption in Temperate and Subarctic Forest Soils: Rates, Vertical Zonation, and Responses to Water and Nitrogen
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