Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.

Feat soil from 12 northern peatlands, spanning broad gradients in mean annual temperature (MAT), mean annual precipitation (MAP), and plant species composition, was incubated in vitro at differing temperature (2, 12, 22 degrees C), aeration (anoxic, oxic), and with or without added glucose to evaluate controls on potential production of CH4 and CO2 (and CH4 consumption). Methane production and CH4 consumption (at 12 degrees C) were significantly higher in open (nonforested) than forested peatlands, and varied as a function of MAT at each site, with maximum CH4 production (>450 nmol g(-1) d(-1)) and minimum CH4 consumption (-0.03 h(-1) g(-1)) at intermediate MAT(i.e., CH4 production <200 nmol g(-1) d(-1) and CH4 consumption -0.06 h(-1) g(-1) at lower and higher MAT). Differences in lignin chemistry of the peat helped explain the variation in CH,cycling: Added glucose stimulated CH4 production bur only in lignin-rich peat. Carbon dioxide production (10-60 mu mol g(-1) d(-1) at 12 degrees C) showed a strong negative relationship with MAT and with the amount and type of lignin in the peat, which increased with decreasing MAT of the site. The results demonstrated complex ways ill which temperature affected production of CH4 and CO2 (and CH4 consumption), attributed to differences in organic chemical composition of peat.

Main Author: Yavitt, Joseph.
Other Authors: Williams, Christopher., Wieder, R Kelman.
Language: English
Published: 1997
Online Access: http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:179354
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dc_source_str_mv Geomicrobiology Journal 14(4), October 1997, 299-316.
author Yavitt, Joseph.
author_facet_str_mv Yavitt, Joseph.
Williams, Christopher.
Wieder, R Kelman.
author_or_contributor_facet_str_mv Yavitt, Joseph.
Williams, Christopher.
Wieder, R Kelman.
author_s Yavitt, Joseph.
spellingShingle Yavitt, Joseph.
Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
author-letter Yavitt, Joseph.
author_sort_str Yavitt, Joseph.
author2 Williams, Christopher.
Wieder, R Kelman.
author2Str Williams, Christopher.
Wieder, R Kelman.
dc_title_str Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
title Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
title_short Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
title_full Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
title_fullStr Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
title_full_unstemmed Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
collection_title_sort_str production of methane and carbon dioxide in peatland ecosystems across north america: effects of temperature, aeration, and organic chemistry of peat.
title_sort production of methane and carbon dioxide in peatland ecosystems across north america: effects of temperature, aeration, and organic chemistry of peat.
description Feat soil from 12 northern peatlands, spanning broad gradients in mean annual temperature (MAT), mean annual precipitation (MAP), and plant species composition, was incubated in vitro at differing temperature (2, 12, 22 degrees C), aeration (anoxic, oxic), and with or without added glucose to evaluate controls on potential production of CH4 and CO2 (and CH4 consumption). Methane production and CH4 consumption (at 12 degrees C) were significantly higher in open (nonforested) than forested peatlands, and varied as a function of MAT at each site, with maximum CH4 production (>450 nmol g(-1) d(-1)) and minimum CH4 consumption (-0.03 h(-1) g(-1)) at intermediate MAT(i.e., CH4 production <200 nmol g(-1) d(-1) and CH4 consumption -0.06 h(-1) g(-1) at lower and higher MAT). Differences in lignin chemistry of the peat helped explain the variation in CH,cycling: Added glucose stimulated CH4 production bur only in lignin-rich peat. Carbon dioxide production (10-60 mu mol g(-1) d(-1) at 12 degrees C) showed a strong negative relationship with MAT and with the amount and type of lignin in the peat, which increased with decreasing MAT of the site. The results demonstrated complex ways ill which temperature affected production of CH4 and CO2 (and CH4 consumption), attributed to differences in organic chemical composition of peat.
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dc.title Production of methane and carbon dioxide in peatland ecosystems across North America: Effects of temperature, aeration, and organic chemistry of peat.
dc.creator Yavitt, Joseph.
Williams, Christopher.
Wieder, R Kelman.
dc.description Feat soil from 12 northern peatlands, spanning broad gradients in mean annual temperature (MAT), mean annual precipitation (MAP), and plant species composition, was incubated in vitro at differing temperature (2, 12, 22 degrees C), aeration (anoxic, oxic), and with or without added glucose to evaluate controls on potential production of CH4 and CO2 (and CH4 consumption). Methane production and CH4 consumption (at 12 degrees C) were significantly higher in open (nonforested) than forested peatlands, and varied as a function of MAT at each site, with maximum CH4 production (>450 nmol g(-1) d(-1)) and minimum CH4 consumption (-0.03 h(-1) g(-1)) at intermediate MAT(i.e., CH4 production <200 nmol g(-1) d(-1) and CH4 consumption -0.06 h(-1) g(-1) at lower and higher MAT). Differences in lignin chemistry of the peat helped explain the variation in CH,cycling: Added glucose stimulated CH4 production bur only in lignin-rich peat. Carbon dioxide production (10-60 mu mol g(-1) d(-1) at 12 degrees C) showed a strong negative relationship with MAT and with the amount and type of lignin in the peat, which increased with decreasing MAT of the site. The results demonstrated complex ways ill which temperature affected production of CH4 and CO2 (and CH4 consumption), attributed to differences in organic chemical composition of peat.
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