CH4 uptake by temperate forest soil: Effect of N input and soil acidification

Sitaula, Bishal K.; Bakken, Lars R.; Abrahamsen, Gunnar

doi:10.1016/0038-0717(95)00017-9

Cited by 137 publications

(79 citation statements)

References 22 publications

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“…The near net zero FCH4 in these transitional sites were a culmination of both 25 CH4 efflux and uptake rather than a consistent intermediate VWC that created near neutral fluxes throughout the season. We did observe near zero fluxes in the VWC range of 3843% that are in accordance with VWC thresholds (3244%) differentiating net CH4 efflux from net uptake in other upland forests (Sitaula et al, 1995;Luo et al, 2013), but this intermediate VWC is likely a transient state that occurs in some parts of the landscape rather than being characteristic of a landscape position throughout the season. We expect the transition zones could be particularly sensitive to climate variability, 30 because the resulting changes in hydrologic dynamics could shift their boundaries and net CH4 flux behaviour.…”

Section: How Do Environmental Variables Relate To Ch4 Flux Through Thsupporting

confidence: 80%

Landscape analysis of soil methane flux across complex terrain

Kaiser¹,

McGlynn²,

Dore³

2018

Preprint

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Section: How Do Environmental Variables Relate To Ch4 Flux Through Thsupporting

confidence: 80%

Landscape analysis of soil methane flux across complex terrain

Kaiser¹,

McGlynn²,

Dore³

2018

Preprint

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“…Castro et al (1995) reported that CH 4 consumption by forest soils was greatest in more fertile sites at the Harvard Forest, Massachusetts, but in N-fertilized soils CH 4 consumption rates were 15-64% lower than in unfertilized stands. Methane consumption in soil is reduced by N additions to soil, possibly as a result of interference by at the site of CH 4 oxidation (Steu- 1989, Mosier et al 1991, Williams and Fehsenfeld 1991, Sitaula et al 1995a.…”

Section: Greenhouse Gas Fluxesmentioning

confidence: 99%

Nitrogen Excess in North American Ecosystems: Predisposing Factors, Ecosystem Responses, and Management Strategies

Fenn¹,

Poth²,

Aber³

et al. 1998

Ecological Applications

328

492

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Abstract. Most forests in North America remain nitrogen limited, although recent studies have identified forested areas that exhibit symptoms of N excess, analogous to overfertilization of arable land. Nitrogen excess in watersheds is detrimental because of disruptions in plant/soil nutrient relations, increased soil acidification and aluminum mobility, increased emissions of nitrogenous greenhouse gases from soil, reduced methane consumption in soil, decreased water quality, toxic effects on freshwater biota, and eutrophication of coastal marine waters. Elevated nitrate ( ) loss to groundwater Ϫ

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“…Forest plots experimentally fertilized with N frequently show depressed atmospheric CH 4 oxidation relative to unfertilized controls (Steudler et al, 1989;King and Schnell, 1994;Sitaula et al, 1995). Consequently, the well-documented worldwide increase in atmospheric N deposition on terrestrial and aquatic environments (Matthews, 1994;Galloway et al, 1995) may result in a decrease in atmospheric CH 4 oxidation by upland forest soils (Castro et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…However, most studies report inhibition of atmospheric CH 4 oxidation in N-fertilized forest soils. Pine forests fertilized with NH 4 NO 3 at 30 and 90 kg N ha À1 gave CH 4 oxidation rates that were 85% and 62%, respectively, of unfertilized controls (Sitaula et al, 1995), while a temperate softwood forest amended with the same fertilizer at 120 kg N ha À1 showed a CH 4 oxidation rates that were 67% of unfertilized controls (Steudler et al, 1989). Urea fertilization of a pine plantation (180 kg N ha À1 ) resulted in a 5-to 20-fold decrease in atmospheric CH 4 oxidation relative to controls (Castro et al, 1995), while application of urea, KNO 3 or NH 4 Cl to forested peatland soils at 100 kg N ha À1 signi®cantly depressed CH 4 oxidation (Crill et al, 1994).…”

mentioning

confidence: 96%

Effect of nitrogen fertilization on atmospheric methane oxidation in boreal forest soils

Whalen

Reeburgh

2000

Chemosphere - Global Change Science

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Importance of this Paper: The``greenhouse'' gas CH 4 is increasing in atmospheric concentration. Oxidation by methanotrophic bacteria in upland soils is the only biological sink for atmospheric CH 4 . Methanotrophs are inhibited by high soil N, raising concern that the contemporary worldwide increase in atmospheric N deposition will decrease soil CH 4 oxidation. The boreal forest occupies 13% of the earth's continental surface and is important in atmospheric CH 4 oxidation. We studied atmospheric CH 4 oxidation in fertilized boreal forest plots to determine the N sensitivity of the methanotrophic community and conclude that increased N deposition will not alter the rates of CH 4 oxidation in these soils. AbstractField plots of aspen and black spruce in the Alaskan boreal forest were fertilized repeatedly with nitrogen during the 1993 summer growing season, and weekly determinations of the in¯uence of fertilization on atmospheric CH 4 oxidation were made with static chambers. Repeated fertilization with (NH 4 ) 2 SO 4 solution or nutrient media used to culture methanotrophic or nitrifying bacteria gave a total addition of 140 or 580 kg N ha À1 . Time-integrated CH 4 oxidation was not signi®cantly dierent in fertilized soils versus watered controls because CH 4 oxidation was localized in a subsurface soil zone that was probably not penetrated by surface-applied aqueous phase fertilizer. Insensitivity of CH 4 oxidation by these soils to a high rate of N fertilization and the low current rate of atmospheric N deposition suggest that future increases in atmospheric N deposition will not alter the sink strength of high latitude boreal forest soils in the atmospheric CH 4 budget. Ó

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CH4 uptake by temperate forest soil: Effect of N input and soil acidification

Cited by 137 publications

References 22 publications

Landscape analysis of soil methane flux across complex terrain

Landscape analysis of soil methane flux across complex terrain

Nitrogen Excess in North American Ecosystems: Predisposing Factors, Ecosystem Responses, and Management Strategies

Effect of nitrogen fertilization on atmospheric methane oxidation in boreal forest soils

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