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Peat growth and carbon accumulation rates during the holocene in boreal mires

Klarqvist, Malin (2001). Peat growth and carbon accumulation rates during the holocene in boreal mires. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230
ISBN 91-576-6087-5
[Doctoral thesis]

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This thesis is based on the analysis of peat stratigraphies to study peat growth and carbon accumulation processes in northern mires. In the first study, problems concerning l4C dating of peat were examined by fractionation of bulk peat samples and l4C AMS dating of the separate fractions. In the following studies, peat cores from twelve Swedish mire sites were investigated. Macrofossil analysis was performed on the sampled cores to describe and classify the plant communities during mire development. Between 6 to 18 l4C AMS datings were performed on one core from each mire in order to estimate the peat growth and carbon accumulation rates for the identified plant communities.
Different fractions within single peat bulk samples gave considerably differing l4C ages. The range in age differed between mire types and depth. For accurate l4C dating, moss-stems, preferably of Sphagnum spp. are recommended (Paper I). Both autogenic and allogenic factors, e.g. climate and developmental stage, respectively, were identified as important influences on carbon accumulation (Paper II). Both peat growth and carbon accumulation rates differed between plant communities. The major factors explaining the variations in accumulation rates of the different plant communities were the amount of Carex and Sphagnum remains and the geographical position of the mire (Paper IV). Carbon accumulation rates decrease along with development in most mires. The results indicate that some mires may have alternated between being carbon sinks and sources, at least over the last several hundred years. The inter-annual variation in carbon accumulation is probably explained by climatic variations (Paper III).

Authors/Creators:Klarqvist, Malin
Title:Peat growth and carbon accumulation rates during the holocene in boreal mires
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Silvestria
Year of publishing :2001
Number of Pages:37
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:91-576-6087-5
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:14C AMS dating, allogenic, autogenic, carbon turnover, Carex, mires, eatlands, Sphagnum
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ID Code:17754
Faculty:S - Faculty of Forest Sciences
Department:(S) > Institutionen för skogsekologi (930701-061231)
Deposited By: SLUpub Connector
Deposited On:08 Oct 2020 12:54
Metadata Last Modified:28 Oct 2020 15:04

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