文章基本信息

标题：Recent Rates of Carbon Accumulation in Montane Fens of Yosemite National Park, California, U.S.A.
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作者：Judith Z. Drexler ; Christopher C. Fuller ; James Orlando 等
期刊名称：Arctic, Antarctic, and Alpine Research
印刷版ISSN：1523-0430
电子版ISSN：1938-4246
出版年度：2015
卷号：47
期号：4
页码：657-669
DOI：10.1657/AAAR0015-002
摘要：Little is known about recent rates of carbon storage in montane peatlands, particularly in the western United States. Here we report on recent rates of carbon accumulation (past 50 to 100 years) in montane groundwater-fed peatlands (fens) of Yosemite National Park in central California, U.S.A. Peat cores were collected at three sites ranging in elevation from 2070 to 2500 m. Core sections were analyzed for bulk density, % organic carbon, and 210 Pb activities for dating purposes. Organic carbon densities ranged from 0.026 to 0.065 g C cm -3 . Mean vertical accretion rates estimated using 210 Pb over the 50-year period from ∼1960 to 2011 and the 100-year period from ∼1910 to 2011 were 0.28 (standard deviation = ±0.09) and 0.18 (±-0.04) cm yr -1 , respectively. Mean carbon accumulation rates over the 50- and 100-year periods were 95.4 (±25.4) and 74.7 (±17.2) g C m -2 yr -1 , respectively. Such rates are similar to recent rates of carbon accumulation in rich fens in western Canada, but more studies are needed to definitively establish both the similarities and differences in peat formation between boreal and temperate montane fens.