Bulk density, and peat and net carbon accumulation of samples from Selwyn lake, Canada ...

• Main Authors: Sannel, A Britta K, Kuhry, Peter
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: Arctic; Canada; Boreas; Selwyn; Selwyn Lake
• Online Access: https://dx.doi.org/10.1594/pangaea.833867; https://doi.pangaea.de/10.1594/PANGAEA.833867

Peat and net carbon accumulation rates in two sub-arctic peat plateaus of west-central Canada have been studied through geochemical analyses and accelerator mass spectrometry (AMS) radiocarbon dating. The peatland sites started to develop around 6600-5900 cal. yr BP and the peat plateau stages are characterized by Sphagnum fuscum peat alternating with rootlet layers. The long-term peat and net carbon accumulation rates for both profiles are 0.30-0.31 mm/yr and 12.5-12.7 gC/m**2/yr, respectively. These values reflect very slow peat accumulation (0.04-0.09 mm/yr) and net carbon accumulation (3.7-5.2 gC/m**2/yr) in the top rootlet layers. Extensive AMS radiocarbon dating of one profile shows that accumulation rates are variable depending on peat plateau stage. Peat accumulation rates are up to six times higher and net carbon accumulation rates up to four times higher in S. fuscum than in rootlet stages. Local fires represented by charcoal remains in some of the rootlet layers result in very low accumulation ... : Supplement to: Sannel, A Britta K; Kuhry, Peter (2009): Holocene peat growth and decay dynamics in sub-arctic peat plateaus, west-central Canada. Boreas, 38(1), 13-24 ...