Abstract
Biological activities in soils are often indirectly assessed by measuring gaseous carbon losses as C02. There is a fundamental difference between respiration in roots as compared with that in soil fauna and microorganisms: energy for root respiration is obtained from translocated photosynthesized carbon within the plant, while energy for soil fauna and microorganisms is obtained from mineralization of organic compounds in the soil. Conversion of soil carbon to C02 releases nutrients fixed in litter, thereby making them available to plants again. The carbon dioxide produced by microorganisms may therefore reflect the turnover of certain minerals in soil (Witkamp, 1973). It is very difficult to separate root respiration from that of microorganisms and soil fauna when measuring evolution of carbon dioxide in the field; these figures can only be used as integrated indices for total metabolism in the soil (MacFadyen, 1971). The use of respiration figures as indices of biological activities in soils may be valid for aerobic soils. Quite another situation prevails in anaerobic soils, where considerable amounts of mineralized carbon may be lost to the atmosphere as methane, and methane production has been observed by Clymo and Reddaway (1971) and Svensson (1974) as playing an important role in very wet areas of oceanic and subarctic peat bogs.
Responsible for the investigation at the Stordalen site as well as for the statistical analyses and the manuscript
Responsible for investigations at Hardangervidda 1972.
Responsible for investigations at Hardangervidda 1973.
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Svensson, B.H., Veum, A.K., Kjelvik, S. (1975). Carbon Losses from Tundra Soils. In: Wielgolaski, F.E. (eds) Fennoscandian Tundra Ecosystems. Ecological Studies, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80937-8_32
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