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Anderson J.P.E., and Domsch, K.H., 1978. A physiological method for the quantitative measurements of
microbial biomass in soils. Soil Biology & Biochemistry 10, 215-221.
Amalds, O., 2004. Volcanic soils of Iceland. Catena 56, 3-20.
Bremmer & Zantua, 1975. Enzyme Activity in Soils at Sub-zero Temperatures. Biochemistry 7, 383-387.
Blakemore, L.C., Searle, P.L. and Daly, B.K., 1987. Methods of Chemical Analysis of Soils. New Zealand
Soil Bureau Science Report, 80, 103.
Clein, J.S., Schimel, J.P., 1995. Microbial activity of tundra and taiga soils at sub-zero temperatures. Soil
Biology & Biochemistry 27, 1231-1234.
DeLuca, T.H., Keeney, D.R. , McCarty, G.W., 1992. Effect of freeze-thaw events on mineralization of soil
nitrogen. Biology and Fertility of Soils 14, 116-120.
Edwards, K.A., McCulloch, J., Kershaw, G.P., Jefferies, R.L., 2006. Soil Biology & Biochemistry 38,
2843-2851.
Hobbie, J.E., Schimel, J.P., Trumbore, S.E., Randerson, J.R., 2000. Controls over carbon storage and tumo-
ver in high-latitude soils. Global Change Biology 6,196-210.
Larsen, K.S., Jonasson S., Michelsen, A., 2002. Repeated freeze-thaw cycles and their effects on biological
processes in two arctic ecosystems types. Applied Soil Ecology 21, 187-195.
Lipson, D.A., Schmidt, S.K., Monson, R,K., 2000. Carbon availability and temperature control the post-
snowmelt decline in alpine soil microbial biomass. Soil Biology & Biochemistry 32, 411-448.
Mikan, C.J., Schimel, P.J., Doyle, A.P., 2002. Temperature controls of microbial respiration in arctic tundra
soils above and below ffeezing. Soil Biology & Biochemistry 34, 1785-1795.
Pietikainen, J., Pettersson, M., Bááth, E., 2005. Comparison of temperature effects on soil respiration and
bacterial and fungal growth rates. FEMS Microbiology Ecology 52,49-58.
Schimel, J.P., Mikan C., 2005. Changing microbial substrate use in Arctic tundra soils through a freeze-
thaw cycle 37, 1411-1418.
Schlesinger, W., 1997. Biogeochemistry. An Analysis of Global Change. Academic Press, San Diego, CA,
588.
Sjursen H., Michelsen A., Holmstmp M., 2005. Effects of freeze and thaw cycles on microarthropods and
nutrient availability in a sub-Arctic soil. Applied Soil Ecology 28, 79-93.
Skogland, T., Lomeland, S., Goksoyr, J., 1988. Respiratory burst after freezing and thawing of soil: experi-
ments with soil bacteria. Soil Biology & Biochemistry 20, 851-856.
Soulides, D.A., Allison, F.E., F.E., 1961. Effects ofdrying and freezing on carbon dioxide production, avail-
able mineral nutrients, aggregation and bacterial populations. Soil Science 91, 291-298.
Tabatabai, M.A., and Bremmer, J.M., 1969. The use of p-nitrophenyl phosphate for assay of soil Phos-
phatase activity. Soil Biology and Biochemistry 1, 301-307.
Trevors, J.T., 1984. Dehydrogenase activity in soil: a comparison between the INT and TTC assay. Soil
biology & Biochemistry 16, 673-674.
Uchida, M., Mo Wenbong, Nakatsubo, T., Tsuchiya, Y., Horikoshi, T., Koizumi, H., 2005. Microbial activ-
ity and litter decomposition under snow cover in a cool-temperate broad-leaved deciduous forest. Agricul-
tural and Forest Meteorology 134, 102-109.
Vance, E.D., Brooks, P.C., Jenkinson, D.S., 1987. An extraction method for measuring soil microbial bio-
mass in a soil. Plant and Soil 76, 257-274.