气候变化领域集成服务门户(CCPortal): Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium

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DOI	10.1007/s10533-020-00724-0
	Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium
	van Bellen S.; Shotyk W.; Magnan G.; Davies L.; Nason T.; Mullan-Boudreau G.; Garneau M.; Noernberg T.; Bragazza L.; Zaccone C.
发表日期	2020
ISSN	0168-2563
起始页码	251
结束页码	272
卷号	151 期号:2020-02-03
英文摘要	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 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 accumulation. Moreover, some of the historically strongly accumulating sites may have become less efficient in sequestering C, and vice versa. All seven sites showed a marked decrease in δ15N when comparing pre- and post-1850 timeframes, consistent with increasing post-1850 N additions from an atmospheric source, likely biological N fixation. Overall, N was not a driving factor for C accumulation. © 2020, Springer Nature Switzerland AG.
英文关键词	Athabasca Bituminous Sands; Bog; Boreal peatlands; Carbon sequestration; Little Ice Age; Nitrogen accumulation rate
语种	英语
scopus关键词	Alberta
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153083
作者单位	Geotop-Université du Québec à Montréal, 201 Avenue du Président Kennedy, Montréal, QC H2X 3Y7, Canada; Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2H1, Canada; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada; Alberta Environment and Parks, 5104 142 Street, Edmonton, AB T6H 4B4, Canada; Heliolytics Inc., 460 Richmond Street, Toronto, ON M5V 1Y1, Canada; Field-Crop Systems and Plant Nutrition, Research Division Plant Production Systems, Agroscope, Route de Duillier 50, Nyon, 1260, Switzerland; Department of Biotechnology, University of Verona, Strada Le Grazie 15, Verona, 37134, Italy; Consortium Érudit, Université de Montréal, CP 6128, Succ. Centre-Ville, Montréal, QC H3C 3J7, Canada; Groupe de Recherche Interuniversitaire en Limnologie (GRIL), Université du Québec à Montréal, Montréal, QC, Canada
推荐引用方式 GB/T 7714	van Bellen S.,Shotyk W.,Magnan G.,et al. Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium[J],2020,151(2020-02-03).
APA	van Bellen S..,Shotyk W..,Magnan G..,Davies L..,Nason T..,...&Zaccone C..(2020).Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium.Biogeochemistry,151(2020-02-03).
MLA	van Bellen S.,et al."Carbon and nitrogen accumulation rates in ombrotrophic peatlands of central and northern Alberta, Canada, during the last millennium".Biogeochemistry 151.2020-02-03(2020).