Bédard , C. and Knowles , R. 1989 . Physiology, biochem-istry and specific inhibitors of CH4, NII4P and CO oxidation by methanotrophs and nitrifiers . Microbiol. Re v . 53 , 68 – 84 .
Conrad , R. and Seiler , W. 1980 . Role of microorganisms in the consumption and production of atmospheric CO by soil . Appl. Environ. Microbiol . 40 , 437 – 445 .
Conrad , R. and Seiler , W. 1982 . Arid soils as a source of atmospheric carbon monoxide . Geophys. Res. Lett . 9 , 1353 – 1356 .
Conrad , R. and Seiler , W. 1985a . Influence of temper-ature, moisture, and organic carbon on the flux of H2 and CO between soil and atmosphere: Field studies in subtropical regions . J. Geophys. Res . 90 , 5699 – 5709 .
Conrad , R. and Seiler , W. 1985b . Characteristics of abiol-ogical carbon monoxide formation from soil organic matter, humic acids and phenolic compounds . Environ. Sci. Technol . 19 , 1165 – 1169 .
Conrad , R. , Schutz , H. and Seiler , W. , 1988 . Emission of carbon monoxide from submerged rice fields into the atmosphere . Atmos. Environ . 22 , 821 – 823 .
Conrad , R. , and Thauer , R. K. 1983. Carbon monoxide production by Methanobacterium thermoautotro-phicum. FEMS Microbiol. Lett . 20 , 229 – 232 .
Funk , D. W. , Pullman , E. R. , Peterson , K. M. , Crill , P. M. and Billings , W. D. 1994 . Influence of water table on carbon dioxide, carbon monoxide, and methane fluxes from taiga bog microcosms . Glob. Biogeochem. Cycles 8 , 271 – 278 .
Gosink , T. A. and Kelley , J. J. 1979 . Carbon monoxide evolution from Arctic surfaces during spring thaw . J. Geophys. Res . 84 , 7041 .
Harriss , R. C. , Sachse , G. W. , Hill , G. F. , Wade , L. O. and Gregory , G. L. 1990 . Carbon monoxide over the Amazon Basin during the wet season . J. Geophys. Res . 95 , 16927 – 16932 .
Jones , R. D. and Morita , R. Y. 1983 . Carbon monoxide oxidation by chemolithotrophic ammonium oxidisers . Can. J. Microbiol . 29 , 1545 – 1551 .
Khalil , M. A. K. , Rasmussen , R. A. , Wang , M-X. and Ren. L. 1990 . Emissions of trace gases from Chinese rice fields and biogas generators: CH4, N20, CO, CO2, chlorocarbons and hydrocarbons . Chemosphere , 20 , 207 – 226 .
Kirchoff , V. W. J. H. and Marinho , E. V. A. 1990 . Surface carbon monoxide measurements in Amazonia . J. Geo-phys. Res . 95 , 16933 – 16943 .
Matson , P. A. , Vitousek , P. M. , Livingston , G. P. and Swanberg , N. A. 1990 . Sources of variation in nitrous oxide flux from Amazonian ecosystems . J. Geophys. Res . 95 , 16789 – 16798 .
Matthews , E. and Fung , I. 1987 . Methane emission from natural wetlands: global distribution, area, and envir-onmental characteristics of sources . Glob. Biogeochem. Cycles 1 , 61 – 86 .
Moxley , J. M. and Smith , K. A. 1997 . Factors affecting utilisation of atmospheric CO by soils. Soil Biol. Bio-chem . in press .
Potter , C. S. , Klooster , S. A. and Chatfield , R. B. 1996 . Consumption and production of carbon monoxide in soils: a global analysis of spatial and seasonal vari-ation . Chemosphere 33 , 1175 – 1193 .
Ritter , J. A. , Barrick , J. D. W. , Sachse , G. W. , Gregory , G. L. , Woerner , M. A. , Watson , C. E. , Hill , G. F. and Collins , J. E. Jr . 1992 . Airborne flux measurements of trace species in the Arctic boundary layer . J. Geophys. Res . 97 , 16601 – 16625 .
Ritter , J. A. , Barrick , J. D. W. , Watson , C. E. , Sachse. , G. W. , Gregory , G. L. , Anderson , B. E. , Woerner , M. A. and Collins , J. E. Jr . 1994 . Airborne boundary layer flux measurements of trace species over Canadian boreal forest and northern wetland regions . J. Geophys. Res . 99 , 1671 – 1685 .
Sanhueza , E. , Donoso , L. , Scharffe , D. and Crutzen , P. J. 1994 . Carbon monoxide fluxes from natural, man-aged, or cultivated savannah grasslands . J. Geophys. Res . 99 , 16421 – 16427 .
Scharffe , D. , Hao , W. M. , Donoso , L. , Crutzen , P. J. and Sanhueza , E. 1990. Soil fluxes and atmospheric con-centration of CO and CH4 in the northern part of the Guayana Shield, Venezuela . J. Geophys. Res . 95 , 22475 – 22480 .
Seiler , W. , Giehl , H. and Roggendorf , P. 1980 . Detection of carbon monoxide and hydrogen by conversion of mercury oxide to mercury vapor . Atmos. Technol . 12 , 40 – 45 .
Smith , K. A. , Bremner , J. M. and Tabatabai , M. A. 1973 . Sorption of gaseous atmospheric pollutants by soils . Soil Sci . 116 , 313 – 319 .
Smith , K. A. , Clayton , H. , McTaggart , I. P. , Thomson , P. E. , Arah , J. R. M. and Scott , A. 1995 . The measure-ment of nitrous oxide emission from soil by using chambers . Phil. Trans. Roy. Soc. London, Ser. A 351 , 327 – 338 .
Wayne , R. P. 1991 . Chemistry of atmospheres, 2nd . edi-tion. Clarendon Press , Oxford .
Zavarzin , G. A. and Nozhevnikova , A. N. 1977 . Aerobic carboxydobacteria . Microb. Ecol . 3 , 305 – 326 .