Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the las
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Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium Simon van Bellen . William Shotyk . Gabriel Magnan . Lauren Davies Ted Nason . Gillian Mullan-Boudreau . Michelle Garneau . Tommy Noernberg . Luca Bragazza . Claudio Zaccone
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Received: 14 April 2020 / Accepted: 4 November 2020 / Published online: 17 November 2020 Ó Springer Nature Switzerland AG 2020
Ted Nason—Retired.
relative influence of climate and anthropogenic disturbance on C accumulation dynamics. Peatlands have accumulated C at an average rate of 25.3 g C m-2 year-1 over the last millennium. Overall, climate was likely a major factor as, on average, highest apparent rates of C accumulation were found around 1100 CE, during the warmer Medieval Climate Anomaly, with lowest rates during the Little Ice Age, around 1750 CE. Local factors, such as disturbance, played a role in C sequestration at the site scale. The average N accumulation rate was 0.55 g N m-2 year-1, with high inter- and intra-site variability. In general, N accumulation mirrored patterns in C sequestration for peat deposited pre-1850 CE. However, higher N accumulation rates observed after 1850 CE, averaging 0.94 g N m-2 year-1, were not correlated with C
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10533-020-00724-0) contains supplementary material, which is available to authorized users.
L. Davies Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada
S. van Bellen G. Magnan M. Garneau Geotop-Universite´ du Que´bec a` Montre´al, 201 Avenue du Pre´sident Kennedy, Montre´al, QC H2X 3Y7, Canada
T. Nason Alberta Environment and Parks, 5104 142 Street, Edmonton, AB T6H 4B4, Canada
S. van Bellen W. Shotyk G. Magnan T. Noernberg Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2H1, Canada
G. Mullan-Boudreau Heliolytics Inc., 460 Richmond Street, Toronto, ON M5V 1Y1, Canada
S. van Bellen (&) Consortium E´rudit, Universite´ de Montre´al, CP 6128, Succ. Centre-Ville, Montre´al, QC H3C 3J7, Canada e-mail: [email protected]
M. Garneau Groupe de Recherche Interuniversitaire en Limnologie (GRIL), Universite´ du Que´bec a` Montre´al, Montre´al, QC, Canada
Abstract Northern peatlands sequester carbon (C) and nitrogen (N) over millennia, at variable rates that depend on climate, environmental variables and anthropogenic activity. The ombrotrophic peatlands of central and northern Alberta (Canada) have developed under variable climate conditions during the last hundreds to thousands of years, while in the course of the twentieth century, some regions were also likely subjected to anthropogenic disturbance. We aimed to quantify peat C and N accumulation rates for the last millennium from seven peatlands to estimate the
Responsible Editor: Scott Bridgham.
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accumulation. Moreover, some of the historically strongly accumulatin
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