METHANE CONSUMPTION IN DECOMPOSING SPHAGNUM-DERIVED PEAT

被引:67
作者
YAVITT, JB
DOWNEY, DM
LANCASTER, E
LANG, GE
机构
[1] CORNELL UNIV,DEPT NAT RESOURCES,ITHACA,NY 14853
[2] JAMES MADISON UNIV,DEPT CHEM,HARRISONBURG,VA 22807
[3] W VIRGINIA UNIV,DEPT BIOL,MORGANTOWN,WV 26506
基金
美国国家科学基金会;
关键词
D O I
10.1016/0038-0717(90)90176-Z
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Methane production and CH4 consumption by moss-derived peats were measured and related to CH4 emission from the same peats to the atmosphere. Peat samples (0-40 cm depth) maintained under anoxic conditions at 19 C for 40 h produced CH4 at rates ranging from 0.5 to 1.0 μmol 1 peat-1 h-1.The same peat samples exposed to aerobic conditions consumed CH4 without showing a lag between production and consumption, suggesting that an active population of aerobic CH4-consuming microorganisms was present in the mostly anoxic peat. However, anaerobic CH4 oxidation could not be ruled out completely. Rates of methane consumption ranged from 1.6 to 0.2μmol 1 peat-1 h-1. Consumed CH4-C was converted to CO2 rather than biomass, indicating that the consumers used CH4 as an energy source. The difference between integrated rates of CH4 production (6.8 mmol m-2 day-1) and CH4 consumption (5.4 mmol m -2 day-1) represented the available amount of CH4 for atmospheric emission. This estimate agreed with measured emission values from intact peat cores (0.2-0.7 mmol m-2 day-1). The results of these studies emphasize the importance of CH4 consumption in controlling CH4 emissions from peatlands to the atmosphere. © 1990.
引用
收藏
页码:441 / 447
页数:7
相关论文
共 36 条
[1]   INHIBITION EXPERIMENTS ON ANAEROBIC METHANE OXIDATION [J].
ALPERIN, MJ ;
REEBURGH, WS .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1985, 50 (04) :940-945
[3]   BIOGEOCHEMICAL ASPECTS OF ATMOSPHERIC METHANE [J].
Cicerone, R. ;
Oremland, R. .
GLOBAL BIOGEOCHEMICAL CYCLES, 1988, 2 (04) :299-327
[4]   METHANE FLUX FROM MINNESOTA PEATLANDS [J].
Crill, P. ;
Bartlett, K. ;
Harriss, R. ;
Gorham, E. ;
Verry, E. ;
Sebacherl, D. ;
Madsar, L. ;
Sanner, W. .
GLOBAL BIOGEOCHEMICAL CYCLES, 1988, 2 (04) :371-384
[5]   AQUATIC ACETYLENE-REDUCTION TECHNIQUES - SOLUTIONS TO SEVERAL PROBLEMS [J].
FLETT, RJ ;
HAMILTON, RD ;
CAMPBELL, NER .
CANADIAN JOURNAL OF MICROBIOLOGY, 1976, 22 (01) :43-51
[6]   A MODEL RELATING LABORATORY MEASUREMENTS OF RATES OF NITRIC-OXIDE PRODUCTION AND FIELD-MEASUREMENTS OF NITRIC-OXIDE EMISSION FROM SOILS [J].
GALBALLY, IE ;
JOHANSSON, C .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1989, 94 (D5) :6473-6480
[7]   ECOPHYSIOLOGICAL ADAPTATIONS OF ANAEROBIC-BACTERIA TO LOW PH - ANALYSIS OF ANAEROBIC-DIGESTION IN ACIDIC BOG SEDIMENTS [J].
GOODWIN, S ;
ZEIKUS, JG .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1987, 53 (01) :57-64
[8]  
GRIFFITHS RD, 1982, APPLIED ENV MICROBIO, V44, P436
[9]   METHANE FLUX IN THE GREAT DISMAL SWAMP [J].
HARRISS, RC ;
SEBACHER, DI ;
DAY, FP .
NATURE, 1982, 297 (5868) :673-674
[10]   METHANE FLUX FROM NORTHERN PEATLANDS [J].
HARRISS, RC ;
GORHAM, E ;
SEBACHER, DI ;
BARTLETT, KB ;
FLEBBE, PA .
NATURE, 1985, 315 (6021) :652-654