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Some future implications for greenho...

Kadonaga, Lisa Kaede.

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Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland./
Author:	Kadonaga, Lisa Kaede.
Description:	178 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-07, Section: A, page: 2607.
Contained By:	Dissertation Abstracts International64-07A.
Subject:	Geography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ82479
ISBN:	0612824799

Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland.
Kadonaga, Lisa Kaede.

Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland. - 178 p.

Source: Dissertation Abstracts International, Volume: 64-07, Section: A, page: 2607.

Thesis (Ph.D.)--University of Victoria (Canada), 2003.

At the end of the 1990s, atmospheric concentrations of methane, a contributor to global warming, approached 1.8 parts per million by volume—nearly double pre-industrial levels. This is due not only to increasing emissions, but also to inhibition of natural sinks. One of these sinks occurs in soils. Two distinct groups of soil bacteria, the methanotrophs and the nitrifiers, are capable of methane oxidation. The highest rates of methane uptake occur in soils inhabited by methanotrophs, while the lowest rates are characteristic of nitrifying bacteria: ammonium fertilization tends to encourage dominance by nitrifiers.

ISBN: 0612824799Subjects--Topical Terms:

524010
Geography.

Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland.
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100 1 $a Kadonaga, Lisa Kaede. $3 1947529
245 1 0 $a Some future implications for greenhouse gas mitigation policy frameworks: The example of methane oxidation by soils in a temperate oak woodland.
300 $a 178 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-07, Section: A, page: 2607.
500 $a Adviser: Stephen C. Lonergan.
502 $a Thesis (Ph.D.)--University of Victoria (Canada), 2003.
520 $a At the end of the 1990s, atmospheric concentrations of methane, a contributor to global warming, approached 1.8 parts per million by volume—nearly double pre-industrial levels. This is due not only to increasing emissions, but also to inhibition of natural sinks. One of these sinks occurs in soils. Two distinct groups of soil bacteria, the methanotrophs and the nitrifiers, are capable of methane oxidation. The highest rates of methane uptake occur in soils inhabited by methanotrophs, while the lowest rates are characteristic of nitrifying bacteria: ammonium fertilization tends to encourage dominance by nitrifiers.
520 $a Short-term chamber experiments were carried out in a variety of different terrestrial environments in Victoria, British Columbia, Canada. Results were consistent with those obtained by other investigators for temperate forest sites elsewhere. Uptake rates of 0.059–0.082 mg·m<super>−2 </super>·h<super>−1</super> were measured at the Garry oak (<italic> Quercus garryana</italic>) woodland, while the closed-canopy mixed forest (<italic>Acer macrophyllum</italic> and <italic>Pseudotsuga menziesii</italic>) had values in the 0.032–0.042 mg·m<super>−2</super>·h<super> −1</super> range. Modified environments such as lawns had significantly lower uptake rates. An abandoned hayfield sampled for this study showed intermediate values. Other researchers have shown that it can take years or decades for environments to recover after reversion to low-nitrogen regimes, which is consistent with a long-term shift in bacterial community composition.
520 $a Given that changes in land use affect soil processes which are intimately linked to atmospheric trace gas regimes, these issues will likely grow in importance over this century. Although current international legislation emphasizes the sequestration of atmospheric carbon dioxide in biomass, not all greenhouse gases follow this model. If mitigative policies are to be extended to other compounds such as methane and nitrous oxide, better understanding of non-sequestration sinks, e.g. soil uptake of CH<sub>4</sub>, and the processes regulating them is essential. More flexible “adaptive management” strategies are desirable, to accommodate changes in environmental conditions and scientific knowledge.
590 $a School code: 0244.
650 4 $a Geography. $3 524010
650 4 $a Environmental Sciences. $3 676987
650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Agriculture, Forestry and Wildlife. $3 783690
690 $a 0366
690 $a 0768
690 $a 0481
690 $a 0478
710 2 0 $a University of Victoria (Canada). $3 1019404
773 0 $t Dissertation Abstracts International $g 64-07A.
790 1 0 $a Lonergan, Stephen C., $e advisor
790 $a 0244
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ82479