Anisimov OA (2007) Potential feedback of thawing permafrost to the global climate system through methane emission. Environ Res Lett 2:045016 (7 pp)

Anisimov OA, Nelson FE, Pavlov AV (1999) Predictive scenarios of permafrost development under conditions of global climate change in the XXI century. Earth Cryol 3:15-25

Aselmann I, Crutzen J (1989) Global distribution of natural freshwater wetlands and rice paddies, their net primary productivity, seasonality and possible methane emissions. J Atmos Chem 8:307-358

Bartlett KB, Crill PM, Sass RL, Harriss RC, Dise NB (1992) Methane emissions from tundra environments in the Yukon-Kuskokwim Delta, Alaska. J Geophys Res 97 (D15):16645-16660

Bergman I, Klarqvist M, Nilsson M (2000) Seasonal variation in rates of methane production from peat of various botanical origins: Effects of temperature and substrate quality. FEMS Microbiol Ecol 33:181-189

Boetius A, Ravenschlag K, Schubert CJ, Rickert D, Widdel F, Gieseke A, Amann R, J0rgensen BB, Witte U, Pfannuche O (2000) A marine microbial consortium apparently mediating anaerobic oxidation of methane. Nature 407:623-626 Bokhorst S, Huiskes A, Convey P, Aerts R (2007) Climate change effects on organic matter decomposition rates in ecosystems from the Maritime Antarctic and Falkland Islands. Global Change Biol 13:2642-2653 Bowman JP (1999) The methanotrophs - The families Methylococcaceae and Methylocystaceae

In: Dworkin M (ed) The prokaryotes. Springer, New York Bowman JP, McCammon SA, Skerratt MG (1997) Methylosphaera hansonii gen. nov., sp. nov., a psychrophilic, group I methanotroph from Antarctic, marine salinity, meromictic lakes. Microbiology 143:1451-1459 Bubier JA, Moore TR, Bellisario L, Comer NT (1995) Ecological controls on methane emissions from a northern peatland complex in the zone of discontinous permafrost, Manitoba, Canada. Global Biogeochem Cycles 9:455-470 Cao MK, Marshall S, Gregson K (1996) Global carbon exchange and methane emissions from natural wetlands: Application of a process-based model. J Geophys Res 101(D9):14399-14414 Cao MK, Gregson K, Marshall S (1998) Global methane emission from wetlands and its sensitivity to climate change. Atmos Environ 32:3293-3299 Cavicchioli R (2006) Cold-adapted archaea. Nature 4:331-343

Chan OC, Claus P, Casper P, Ulrich A, Lueders T, Conrad R (2005) Vertical distribution of the methanogenic archaeal community in Lake Dagow sediment. Environ Microbiol 7:1139-1149

Christensen TR, Jonasson S, Callaghan TV, Havström M (1995) Spatial variation in high-latitude methane flux along a transect across Siberian and Eurasian tundra environments, J Geophys Res 100:21035-21045

Christensen TR, Friborg T, Sommerkorn M, Kaplan J, Illeris L, Soegaard H, Nordstroem C, Jonasson S (2000) Trace gas exchange in a high-arctic valley: 1. Variations in CO2 and CH4 flux between tundra vegetation types. Global Biogeochem Cycles 14:701-713 Christensen TR, Johansson TR, Akerman HJ, Mastepanov M, Malmer N, Friborg T, Crill P, Svensson BH (2004) Thawing sub-arctic permafrost: Effects on vegetation and methane emissions. Geophys Res Lett 30:L04501 Conrad R (2005) Quantification of methanogenic pathways using stable carbonisotopic signatures: A review and a proposal. Org Geochem 36:739-752 Corradi C, Kolle O, Walter K, Zimov SA, Schulze ED (2005) Carbon dioxide and methane exchange of a north-east Siberian tussock tundra. Global Change Biol 11:1910-1925 Dedysh SN, Liesack W, Khmelenina VN, Suzina NE, Trotsenko YA, Semrau JD, Bares AM, Panikov NS, Tiedje JM (2000) Methylocellapalustris gen. nov., sp. nov., a new methane oxidizing acidophilic bacterium from peat bogs, representing a novel subtype of serine-pathway methanotrophs. Int J Syst Evol Microbiol 50:955-969 Dedysh SN, Horz HP, Dunfield PE, Liesack W (2001) A novel pmoA lineage represented by the acidophilic methanotrophic bacterium Methylocapsa acidiphila B2. Arch Microbiol 177:117-121 Dedysh SN, Khmelenina VN, Suzina NE, Trotsenko YA, Semrau JD, Liesack W, Tiedje JM (2002) Methylocapsa acidiphila gen. nov., sp. nov., a novel methane-oxidizing and dinitrogen-fixing acidophilic bacterium from Sphagnum bog. Int J Syst Evol Microbiol 52:251-261 Dedysh SN, Berestovskaya YY, Vasilieva LV, Belova SE, Khmelenina VN, Suzina NE, Trotsenko YA, Liesack W, Zavarzin GA (2004) Methylocella tundrae sp. nov., a novel methanotrophic bacterium from acidic tundra peatlands. Int J Syst Evol Microbiol 54:151-156 Dunfield PF, Yuryev A, Senin P, Smirnova AV, Stott MS, Hou S, Ly B, Saw JH, Zhou Z, Ren Y, Wang J, Mountain BW, Crowe MA, Weatherby TM, Bodelier PLE, Liesack W, Feng L, Wang L, Alam M (2007) Methane oxidation by an extremely acidophilic bacterium of the phylum Verrucomicrobia. Nature 450:879-882 Dutta K, Schuur EAG, Neff JC, Zimov SA (2006) Potential carbon release from permafrost soils of Northeastern Siberia. Global Change Biol 12:2336-2351

Ehhalt DH, Schmidt U (1978) Sources and sinks of atmospheric methane. Pure Appl Geophys 116:452-464

Frenzel P, Karofeld E (2000) CH4 emission from a hollow-ridge complex in a raised bog: The role of CH4 production and oxidation. Biogeochemistry 51:91-112 Friborg T, Soegaard H, Christensen TR, Lloyd CR, Panikov N (2003) Siberian wetlands: Where a sink is a source. Geophys Res Lett 30:2129 Fung I, John J, Lerner J, Matthews E, Prather M, Steele LP, Fraser PJ (1991) Three-dimensional model synthesis of the global methane cycle. J Geophysical Res 96:13033-13065 Ganzert L, Jurgens G, Münster U, Wagner D (2007) Methanogenic communities in permafrost-affected soils of the Laptev Sea coast, Siberian Arctic, characterized by 16S rRNA gene fingerprints. FEMS Microbiol Ecol 59:476-488 Gorham E (1991) Northern peatlands role in the carbon cycle and probable responses to climatic warming. Ecol Appl 1:182-195 Grosskopf R, Stubner S, Liesack W (1998) Novel euryarchaeotal lineages detected on rice roots and in the anoxic bulk soil of flooded rice microcosms. Appl Environ Microbiol 64:4983-4989

Guindon S, Gascuel O (2003) A simple, fast, and accurate algorithm to estimate large phylogenies by maximum likelihood. Syst Biol 52:696-704 Hales BA, Edwards C, Ritchie DA, Hall G, Pickup RW, Saunders JR (1996) Isolation and identification of methanogen-specific DNA from blanket bog peat by PCR amplification and sequence analysis. Appl Environ Microbiol 62:668-675 Hanson RS, Hanson TE (1996) Methanotrophic Bacteria. Microbiol Rev 60:439-471 Hedderich R, Whitman W (2006) Physiology and biochemistry of the methane-producing archaea. In: Dworkin M, Falkow S, Rosenberg E, Schleifer K-H, Stackebrandt E (eds) The Prokaryotes, vol 2. Springer, New York, pp 1050-1079 Heyer J, Berger U, Hardt M, Dunfield PF (2005) Methylohalobius crimeensis gen. nov., sp. nov., a moderately halophilic, methanotrophic bacterium isolated from hypersaline lakes of Crimea. Int J Syst Evol Microbiol 55:1817-1826 Hogg EH (1993) Decay potential of hummock and hollow Sphagnum peats at different depths in a Swedish raised bog. Oikos 66:269-278 Horz HP, Rich V, Avrahami S, Bohannan BJM (2005) Methane-oxidizing bacteria in a California upland grassland soil: Diversity and response to stimulated global change. Appl Environ Microbiol 71:2642-2652 H0j L, Olsen RA, Torsvik VL (2005) Archaeal communities in High Arctic wetlands at Spitsbergen, Norway (78°N) as characterised by 16S rRNA gene fingerprinting. FEMS Microbiol Ecol 53:89-101 H0j L, Rusten M, Haugen LE, Olsen RA, Torsvik VL (2006) Effects of water regime on archaeal community composition in Arctic soils. Environ Microbiol 8:984-996 H0j L, Olsen RA, Torsvik VL (2008) Effects of temperature on the diversity and community structure of known methanogenic groups and other archaea in high Arctic peat. ISME J 2:37-48 IPCC (2001) Climate Change 2001: The scientific basis. URL: tar/wg1/index.htm

IPCC (2007) Climate Change 2007: Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, The Physical Basis of Climate Change: Jeanthon C, L'Haridon S, Pradel N, Prieur D (1999) Rapid identification of hyperthermophilic methanococci isolated from deep-sea hydrothermal vents. Int J Syst Bacteriol 49:591-594 Joabsson A, Christensen TR (2001) Methane emissions from wetlands and their relationship with vascular plants: An Arctic example. Global Change Biol 7:919-932 Joabsson A, Christensen TR, Wallen B (1999) Influence of vascular plant photosynthetic rate on

CH4 emission from peat monoliths from southern boreal Sweden. Polar Res 18:215-220 Jurgens G, Glöckner FO, Amann R, Saano A, Montonen L, Likolammi M, Münster U (2000) Identification of novel Archaea in bacterioplancton of a boreal forest lake by phylogenetic analysis and fluorescence in situ hybridisation. FEMS Microbiol Ecol 34:45-56

Kaluzhnaya MG, Khmelenina VN, Kotelnikova S, Holmquist L, Pedersen K, Trotsenko YA (1999) Methylomonas scandinavica gen. nov., sp. nov., a new methanotrophic psychrotrophic bacterium isolated from deep igneous rock ground water of Sweden. System Appl Microbiol 22:565-572

Kaluzhnaya MG, Makutina VA, Rusakova TG, Nikitin DV, Khmelenina VN, Dmitriev VV, Trotsenko YA (2002) Methanotrophic communities in the soils of the Russian northern taiga and subarctic tundra. Microbiology 71:223-227 Keough BP, Schmidt TM, Hicks RE (2003) Archaeal nucleic acids in picoplankton from great lakes on three continents. Microb Ecol 46:238-248 Khmelenina VN, Makutina VA, Kaluzhnaya MG, Rivkina EM, Gilichinsky DA, Trotsenko YA (2001) Discovery of viable methanotrophic bacteria in permafrost sediments of northeast Siberia. Dokl Biol Sci 384:235-237 Kobabe S, Wagner D, Pfeiffer EM (2004) Characterization of microbial community composition of a Siberian tundra soil by fluorescence in situ hybridization. FEMS Microbiol Ecol 50:13-23

Kutzbach L, Wagner D, Pfeiffer EM (2004) Effect of microrelief and vegetation on methane emission from wet polygonal tundra, Lena Delta, Northern Siberia. Biogeochemistry 69:341-362 Kutzbach L, Wille C, Pfeiffer EM (2007) The exchange of carbon dioxide between wet arctic tundra and the atmosphere at the Lena River Delta, Northern Siberia. Biogeosciences 4:869-890 Le Mer J, Roger P (2001) Production, oxidation, emission and consumption of methane by soils:

A review. Eur J Soil Biol 37:25-50 Liblik LK, Moore TR, Bubier JL, Robinson SD (1997) Methane emissions from wetlands in the zone of discontinuous permafrost: Fort Simpson, Northwest Territories, Cananda. Global Biogeochem Cycles 11:485-494 Liebner S, Wagner D (2007) Abundance, distribution and potential activity of methane oxidizing bacteria in permafrost soils from the Lena Delta, Siberia. Environ Microbiol 9:107-117 Liebner S, Rublack K, Stuehrmann T, Wagner D (2008) Diversity of aerobic methanotrophic bacteria in a permafrost soil of the Lena Delta, Siberia. Microb Ecol DOI: 10.1007/s00248-008-9411-x Lin C, Raskin L, Stahl DA (1997) Microbial community structure in gastrointestinal tracts of domestic animals: Comparative analyses using rRNA-targeted oligonucleotide probes. FEMS Microbiol Ecol 22:281-294 Mathrani IM, Boone DR (1985) Isolation and characterization of a moderatly halophilic metha-

nogen from a solar saltern. Appl Environ Microbiol 50:140-143 Metje M, Frenzel P (2007) Methanogenesis and methanogenic pathways in a peat from subarctic permafrost. Environ Microbiol 9:954-964 Michaelson GJ, Ping CL, Kimble JM (1996) Carbon storage and distribution in tundra soils of

Arctic Alaska, USA. Arctic Alp Res 28:414-424 Mohanty SR, Bodelier PLE, Conrad R (2007) Effect of temperature on composition of the methanotrophic community in rice field and forest soil. FEMS Microbiol Ecol 62:24-31 Morozova D, Wagner D (2007) Stress response of methanogenic archaea from Siberian permafrost compared to methanogens from non-permafrost habitats. FEMS Microbiol Ecol 61:16-25

Morozova D, Mohlmann D, Wagner D (2007) Survival of methanogenic archaea from Siberian permafrost under simulated Martian thermal conditions. Orig Life Evol Biosph 37:189-200 Nelson FE, Anisimov OA, Shiklomanov NI (2001) Subsidence risk from thawing permafrost. Nature 410:889-890

Oberbauer SF, Starr G, Pop EW (1998) Effects of extended growing and soil warming on carbon dioxide and methane exchange of tussock tundra in Alaska. J Geophys Res 103:29, 075-29,082

Ochsenreiter T, Selezi D, Quaiser A, Bonch-Osmolovskaya L, Schleper C (2003) Diversity and abundance of Crenarchaeota in terrestrial habitats studied by 16S RNA surveys and real time PCR. Environ Microbiol 5:787-797 Oechel WC, Hastings SJ, Jenkins M, Riechers G, Grulke NE, Vourlitis GL (1993) Recent change of arctic tundra ecosystems from a net carbon sink to a source. Nature 361:520-526

Omelchenko MB, Vasieleva LV, Zavarzin GA, Savelieva ND, Lysenko AM, Mityushina LL, Khmelenina VN, Trotsenko YA (1996) A novel psychrophilic methanotroph of the genus Methylobacter. Microbiology 65:339-343 Osterkamp TE (2001) Subsea permafrost. In: Steele JH, Thorpe SA, Turekian KK (eds)

Encyclopedia of ocean sciences. Academic Press, New York, pp 2902-2912 Pacheco-Oliver M, McDonald IR, Groleau D, Murrell JC, Miguez CB (2002) Detection of methano-trophs with highly divergent pmoA genes from Arctic soils. FEMS Microbiol Lett 209:313-319 Pancost RD, Steart DS, Handley L, Collinson ME, Hooker JJ, Scott AC, Grassineau NV, Glasspool IJ (2007) Increased terrestrial methane cycling at the Paleocene-Eocene thermal maximum. Nature 449:332-335

Panikov NS (1999) Understanding and predicting of soil microbial community dynamics under global change. Appl Soil Ecol 11:161-176 Panikov NS, Dedysh SN (2000) Cold season CH4 and CO2 emission from boreal peat bogs (West Siberia) winter fluxes and thaw activation dynamics. Global Biogeochem Cycles 14:1071-1080

Pol A, Heijmans K, Harhangi HR, Tedesco D, Jetten MSM, Op den Camp HJM (2007)

Methanotrophy below pH1 by a new Verrucomicrobia species. Nature 450:874-878 Popp TJ, Chanton JP, Whiting GJ, Grant N (2000) Evaluation of methane oxidation in the rhizosphere of a Carex dominated fen in north central Alberta, Canada. Biogeochemistry 51:259-281 Post WM, Emanuel WR, Zinke PJ, Stangenberger AG (1982) Soil carbon pools and world life zones. Nature 298:156-159 Raghoebarsing AA, Pol A, van de Pas-Schoonen KT, Smolders AJP, Ettwig KF, Rijpstra WI, Schouten S, Damste JSS, Op den Camp HJM, Jetten MSM, Strous M (2006) A microbial consortium couples anaerobic methane oxidation to dentrification. Nature 440:918-921 Rahalkar M, Bussmann I, Schink B (2007) Methylosoma difficile gen. nov., sp. nov., a novel methanotroph enriched by gradient cultivation from littoral sediment of Lake Constance. Int J Syst Evol Microbiol 57:1073-1080 Ramakrishnan B, Lueders T, Dunfield PF, Conrad R, Friedrich MW (2001) Archaeal community structures in rice soils from different geographical regions before and after initiation of methane production. FEMS Microbiol Ecol 37:175-186 Reeburgh WS, King JY, Regli SK, Kling GW, Auerbach NA, Walker DA (1998) A CH4 emission estimate for the Kuparuk River basin, Alaska. J Geophys Res 103:29,005-29,013 Rivkina EM, Gilichinsky D, Wagener S, Tiedje J, McGrath J (1998) Biochemical activity of anaerobic microorganisms from buried permafrost sediments. Geomicrobiol J 15:187-193 Roslev P, King GM (1996) Regulation of methane oxidation in a freshwater wetland by water table changes and anoxia. FEMS Microbiol Ecol 19:105-115 Samarkin VA, Fedorov-Davydov DG, Vecherskaya MS, Rivkina EM (1994) CO2 and CH4 emissions on cryosols and subsoil permafrost and possible global climate changes In: Lal R, Kimble JM, Levine E (eds) Soil processes and greenhouse effect. USDA Soil Conservation Service, National Soil Survey Center, Lincoln, NE, pp 55-71 Samarkin VA, Gundelwein A, Pfeiffer EM (1999) Studies of methane production and emission in relation to the microrelief of a polygonal tundra in northern Siberia. In: Kassens H, Bauch HA, Dmitrenko IA, et al. (eds) Land-ocean systems in the Siberian Arctic, dynamics and history. Springer, Berlin, pp 329-342 Schell DM, Ziemann PJ (1983) Accumulation of peat carbon in the Alaska Arctic coastal plain and its role in biological productivity. In: Permafrost: Fourth International Conference Proceedings, Fairbanks, Alaska. Washington DC, Natl Acad Sci, pp 1105-1110 Schimel JP, Gulledge J (1998) Microbial community structure and global trace gases. Global Change Biol 4:745-758

Schink B, Stams AJM (2006) Syntrophism among prokaryotes. In: Dworkin M, Falkow S, Rosenberg E, Schleifer K-H, Stackebrandt E (eds) The prokaryotes, vol 2. Springer, New York, pp 309-335

Segers R (1998) Methane production and methane consumption: A review of processes underlying wetland methane fluxes. Biogeochemistry 41:23-51

Simankova MV, Kotsyurbenko OR, Lueders T, Nozhevnikova AN, Wagner B, Conrad R, Friedrich MW (2003) Isolation and characterization of new strains of methanogens from cold terrestrial habitats. Syst Appl Microbiol 26:312-318 Slobodkin AI, Panikov NS, Zavarzin GA (1992) Formation and uptake of methane in tundra and boreal wetlands. Microbiology 61:683-691 Stendel M, Romanovsky VE, Christensen JH, Sazonova T (2007) Using dynamical downscaling to close the gap between global change scenarios and local permafrost dynamics. Global Planet Change 56:203-214 Steven B, Briggs G, McKay CP, Pollard WH, Greer CW, Whyte LG (2007) Characterization of the microbial diversity in a permafrost sample from the Canadian high Arctic using culture-dependent and culture-independent methods. FEMS Microbiol Ecol 59:513-523 Stoecker K, Bendinger B, Schöning B, Nielsen PH, Nielsen JL, Baranyi C, Toenshoff ER, Daims H, Wagner M (2006) Cohn's Crenothrix is a filamentous methane oxidizer with an unusual methane monooxygenase. Proc Natl Acad Sci 14:2363-2367 Svensson BH, Rosswall T (1984) In situ methane production from acid peat in plant communities with different moisture regimes in a subarctic mire. Oikos 43:341-350 Tarnocai C, Smith CAS (1992) The formation and properties of soils in the permafrost regions of Canada. In: Gilichinsky DA (ed) Crysols: The effects of cryogenesis on the processes and pre-culiarities of soil formation. Proceedings of the 1st International Conference on Cryopedology, Pushchino, Russia. Russian Academy of Sciences, Institute of Soil Science and Photosynthesis, pp 21-42

Torn MS, Chapin FS (1993) Environmental and biotic controls over methane flux from arctic tundra. Chemosphere 26:357-368 Trotsenko YA, Khmelenina VN (2005) Aerobic methanotrophic bacteria of cold ecosystems.

FEMS Microbiol Ecol 53:15-26 Tsubota J, Eshinimaev BT, Khmelenina VN, Trotsenko YA (2005) Methylothermus thermalis gen. nov., sp. nov., a novel moderately thermophilic obligate methanotroph from a hot spring in Japan. Int J Syst Evol Microbiol 55:1877-1884 Tsuyuzaki S, Nakano T, Kuniyoshi S, Fukuda M (2001) Methane flux in grassy marshlands near

Kolyma River, north-eastern Siberia. Soil Biol Biochem 33:1419-1423 Van der Nat FJWA, Middelburg JJ (1998) Seasonal variation in methane oxidation by the rhizo-

sphere of Phragmites australis and Scirpus lacustris. Aqua Bot 61:95-110 Vecherskaya MS, Galchenko VF, Sokolova EN, Samarkin VA (1993) Activity and species composition of aerobic methanotrophic communities in tundra soils. Curr Microbiol 27: 181-184

Vourlitis GL, Oechel WC, Hastings SJ, Jenkins MA (1993) The effect of soil moisture and thaw depth on CH4 flux from wet coastal tundra ecosystems on the north slope of Alaska. Chemosphere 26:329-337 Wagner D (2008) Microbial communities and processes in Arctic permafrost environments. In: Dion P, Nautiyal CS (eds) Microbiology of extreme soils. Soil biology, vol 13. Springer, Berlin, pp 133-154

Wagner D, Kobabe S, Pfeiffer EM, Hubberten (2003) Microbial controls on methane fluxes from a polygonal tundra of the Lena Delta, Siberia. Permafrost Periglac Process 14:173-185 Wagner D, Lipski A, Embacher A, Gattinger A (2005) Methane fluxes in extreme permafrost habitats of the Lena Delta: Effects of microbial community structure and organic matter quality. Environ Microbiol 7:1582-1592 Wagner D, Gattinger A, Embacher A, Pfeiffer EM, Schloter M, Lipski A (2007) Methanogenic activity and biomass in Holocene permafrost deposits of the Lena Delta, Siberian Arctic and its implication for the global methane budget. Global Change Biol 13:1089-1099 Walter BP, Heimann M, Matthews E (2001) Modeling modern methane emissions from natural wetlands, 1. Model description and results. J Geophys Res 106:34,189-134,206 Wartiainen I, Hestnes AG, Svenning MM (2003) Methanotrophic diversity in high arctic wetlands on the islands of Svalbard (Norway) - denaturing gradient gel electrophoresis analysis of soil DNA and enrichment cultures. Can J Microbiol 49:602-612

Wartiainen I, Hestnes AG, McDonald IR, Svenning MM (2006a) Methylobacter tundripaludum sp. nov., a novel methanotrophic bacterium from Arctic wetland soil, Svalbard, Norway (78°N). Int J Syst Evol Microbiol 56:109-113 Wartiainen I, Hestnes AG, McDonald IR, Svenning MM (2006b) Methylocystis rosea sp. nov., a novel methanotrophic bacterium from Arctic wetland soil, Svalbard, Norway (78°N). Int J Syst Evol Microbiol 56:541-547 Whalen SC, Reeburgh WS (1988) A methane flux time series for tundra environments. Global

Biogeochem Cycles 2:399-409 Whalen SC, Reeburgh WS (1992) Interannual variations in tundra methane emission: A 4-year time series at fixed sites. Global Biogeochem Cycles 6:139-159 Whiting GJ, Chanton JP (1992) Plant-dependent CH4-emission in a subarctic Canadian fen.

Global Biogeochem Cycles 9:225-231 Wille C, Kutzbach L, Sachs T, Wagner D, Pfeiffer EM (2008) Methane emission from Siberian Arctic polygonal tundra: Eddy covariance measurements and modeling. Global Change Biol 14: 1395-1408

Wise MG, McArthur JV, Shimkets LJ (2001) Methylosarcina fibrata gen. nov. sp. nov. and Methylosarcina quisquiliarum sp. nov., novel type I methanotrophs. Int J Syst Evol Microbiol 51:611-621

Wuebbles J, Hayhoe K (2002) Atmospheric methane and global change. Earth Sci Rev 57: 177-210

Yavitt JB, Williams CJ, Wieder RK (2000) Controls on microbial production of methane and carbon dioxide in three Sphagnum-dominated peatland ecosystems as revealed by a reciprocal field peat transplant experiment. Geomicrobiol J 17:61-88 Zhang T, Barry RG, Knowles K, Heginbotton JA, Brown J (1999) Statistics and characteristics of permafrost and ground-ice distribution in the northern hemisphere. Polar Geogr 23:132-154 Zhang W, Parker KM, Lou Y, Wan S, Wallace LL, Hu S (2005) Soil microbial response to experimental warming and clipping in a tallgrass prairie. Global Change Biol 11:266-277 Zhuang Q, Melillo JM, Kicklighter DW Prinn, RG McGuire, AD Steudler, PA Felzer, BS, Hu S (2004) Methane fluxes between terrestrial ecosystems and the atmosphere at northern latitudes during past century: A retrospective analysis with a process-based biogeochemistry model. Global Biogeochem Cycle 18:3010 (23 pp) Zimov SA, Schuur EAG, Chapin III FS (2006) Permafrost and the global carbon budget. Science 312:1612-1613

Zsolnay A (2003) Dissolved organic matter: Artefacts, definitions, and functions. Geoderma 113:187-209

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