DYNAMICS AND CONTROLS OF METHANE OXIDATION IN A DANISH WETLAND SEDIMENT

被引:79
作者
KING, GM [1 ]
机构
[1] AARHUS UNIV,DEPT ECOL & GENET,DK-8000 AARHUS,DENMARK
基金
美国国家航空航天局;
关键词
METHANE; METHANE OXIDATION; SEDIMENT; WETLANDS; METHANOTROPHS;
D O I
10.1111/j.1574-6968.1990.tb04078.x
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The patterns and controls of methane oxidation in a Danish wetland sediment have been determined using a combination of slurry and intact core techniques. Results from slurries indicated that methane oxidation was effectively inhibited by low concentrations of nitrapyrin (9-mu-m) and acetylene (0.5-mu-M) but that oxidation was relatively insensitive to pH between 6 and 8; in addition, high concentrations of ammonia (1 mM) decreased oxidation, especially at alkaline pH. Kinetic analyses of methane oxidation in slurries indicated that V(max) was high relative to values reported for other sediments, that V(max) changed seasonally, that K(m) was consistently low (2-4 mu-M) and the threshold values were low (3-5 nM0 but insufficient to allow consumption of atmospheric methane. Analyses based on intact cores indicated that the extent of methane oxidation was highly dependent on oxygen availability, particularly as affected by benthic photosynthesis or the presence of algal mats. Methane emission and oxidation showed a light saturation response above 400 mu-Einsteins m-2 s-1. Both core and slurry analyses indicated that even short periods of anoxia resulted in losses of the capacity for methane oxidation after re-exposure to air. On the other hand, the presence of anoxia-insensitive organisms provided for a significant residual post-anoxia activity. Results from addition of nitrapyrin to the surface of intact cores indicated that shifts in methane emissions coincident with short-term changes in the availability of oxygen were the result of changes in methane oxidation, not methanogenesis.
引用
收藏
页码:309 / 323
页数:15
相关论文
共 50 条
[41]   FIELD STUDIES OF METHANE EMISSION FROM TERMITE NESTS INTO THE ATMOSPHERE AND MEASUREMENTS OF METHANE UPTAKE BY TROPICAL SOILS [J].
SEILER, W ;
CONRAD, R ;
SCHARFFE, D .
JOURNAL OF ATMOSPHERIC CHEMISTRY, 1984, 1 (02) :171-186
[42]   INFLUENCE OF NITROGEN-FERTILIZATION ON METHANE UPTAKE IN TEMPERATE FOREST SOILS [J].
STEUDLER, PA ;
BOWDEN, RD ;
MELILLO, JM ;
ABER, JD .
NATURE, 1989, 341 (6240) :314-316
[43]  
SWEERTS JP, 1990, UNPUB LIMNOL OCEANOG
[44]  
VANLIERE L, 1982, BIOL CYANOBACTERIA, P9
[45]   C-14 IN METHANE SOURCES AND IN ATMOSPHERIC METHANE - THE CONTRIBUTION FROM FOSSIL CARBON [J].
WAHLEN, M ;
TANAKA, N ;
HENRY, R ;
DECK, B ;
ZEGLEN, J ;
VOGEL, JS ;
SOUTHON, J ;
SHEMESH, A ;
FAIRBANKS, R ;
BROECKER, W .
SCIENCE, 1989, 245 (4915) :286-290
[46]  
WHALEN SC, 1990, IN PRESS APPL ENV MI
[47]   SEASONAL-VARIATION OF METHANE EMISSIONS FROM A TEMPERATE SWAMP [J].
WILSON, JO ;
CRILL, PM ;
BARTLETT, KB ;
SEBACHER, DI ;
HARRISS, RC ;
SASS, RL .
BIOGEOCHEMISTRY, 1989, 8 (01) :55-71
[48]   SOLUBILITY OF METHANE IN DISTILLED WATER AND SEAWATER [J].
YAMAMOTO, S ;
ALCAUSKAS, JB ;
CROZIER, TE .
JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1976, 21 (01) :78-80
[49]   METHANE CONSUMPTION IN DECOMPOSING SPHAGNUM-DERIVED PEAT [J].
YAVITT, JB ;
DOWNEY, DM ;
LANCASTER, E ;
LANG, GE .
SOIL BIOLOGY & BIOCHEMISTRY, 1990, 22 (04) :441-447
[50]   POTENTIAL METHANE PRODUCTION AND METHANE OXIDATION RATES IN PEATLAND ECOSYSTEMS OF THE APPALACHIAN MOUNTAINS, UNITED STATES [J].
Yavitt, Joseph ;
Lang, Gerald ;
Downey, Daniel .
GLOBAL BIOGEOCHEMICAL CYCLES, 1988, 2 (03) :253-268