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  Controls over carbon storage and turnover in high-latitude soils

Hobbie, S. E., Schimel, J. P., Trumbore, S. E., & Randerson, J. R. (2000). Controls over carbon storage and turnover in high-latitude soils. Global Change Biology, 6, 196-210. doi:10.1046/j.1365-2486.2000.06021.x.

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BEX429.pdf (Publisher version), 166KB
 
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Hobbie, S. E., Author
Schimel, J. P., Author
Trumbore, Susan E.1, Author           
Randerson, J. R., Author
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1External Organizations, ou_persistent22              

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Free keywords: Arctic boreal carbon decomposition global change soil long-term decomposition scots pine forest mass-loss rates arctic polar semidesert net primary production litter decomposition boreal forest co2 efflux tundra ecosystems atmospheric co2
 Abstract: Despite the importance of Arctic and boreal regions in the present carbon cycle, estimates of annual high-latitude carbon fluxes vary in sign and magnitude. Without accurate estimates of current carbon fluxes from Arctic and boreal ecosystems, predicting the response of these systems to global change is daunting. A number of factors control carbon turnover in high-latitude soils, but because they are unique to northern systems, they are mostly ignored by biogeochemical models used to predict the response of these systems to global change. Here, we review those factors. First, many northern systems are dominated by mosses, whose extremely slow decomposition is not predicted by commonly used indices of litter quality. Second, cold temperature, permafrost, waterlogging and substrate quality interact to stabilize soil organic matter, but the relative importance of these factors, and how they respond to climate change, is unknown. Third, recent evidence suggests that biological activity occurring over winter can contribute significantly to annual soil carbon fluxes. However, the controls over this winter activity remain poorly understood. Finally, processes at the landscape stale, such as fire, permafrost dynamics, and drainage, control regional carbon fluxes, complicating the extrapolation of site-level measurements to regional scales.

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Language(s): eng - English
 Dates: 2000
 Publication Status: Issued
 Pages: -
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 Rev. Type: -
 Identifiers: Other: BEX429
DOI: 10.1046/j.1365-2486.2000.06021.x
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Title: Global Change Biology
Source Genre: Journal
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Publ. Info: Oxford, UK : Blackwell Science
Pages: - Volume / Issue: 6 Sequence Number: - Start / End Page: 196 - 210 Identifier: ISSN: 1354-1013
CoNE: https://pure.mpg.de/cone/journals/resource/954925618107