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    Soil carbon fluxes and stocks in a Great Lakes forest chronosequence

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    Tang_MS_GCB.pdf (105.9Kb)
    Date
    2008-07
    Author
    Tang, Jianwu  Concept link
    Bolstad, Paul V.  Concept link
    Martin, Jonathan G.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/2714
    As published
    https://doi.org/10.1111/j.1365-2486.2008.01741.x
    Keyword
     Chronosequence; Succession; Soil respiration; CO2 flux; Soil carbon; Old-growth 
    Abstract
    We measured soil respiration and soil carbon stocks, as well as micrometeorological variables in a chronosequence of deciduous forests in Wisconsin and Michigan. The chronosequence consisted of (1) four recently disturbed stands, including a clearcut and repeatedly burned stand (burn), a blowdown and partial salvage stand (blowdown), a clearcut with sparse residual overstory (residual), and a regenerated stand from a complete clearcut (regenerated); (2) four young aspen (Populus tremuloides) stands in average age of 10 years; (3) four intermediate aspen stands in average age of 26 years; (4) four mature northern hardwood stands in average age of 73 years; and (5) an old-growth stand approximately 350 years old. We fitted site-based models and used continuous measurements of soil temperature to estimate cumulative soil respiration for the growing season of 2005 (days 133 to 295). Cumulative soil respiration in the growing season was estimated to be 513, 680, 747, 747, 794, 802, 690, and 571 gC m-2 in the burn, blowdown, residual, regenerated, young, intermediate, mature, and old-growth stands, respectively. The measured apparent temperature sensitivity of soil respiration was the highest in the regenerated stand, and declined from the young stands to the old-growth. Both cumulative soil respiration and basal soil respiration at 10˚C increased during stand establishment, peaked at intermediate age, and then decreased with age. Total soil carbon at 0-60 cm initially decreased after harvest, and increased after stands established. The old-growth stand accumulated carbon in deep layers of soils, but not in the surface soils. Our study suggests a complexity of long-term soil carbon dynamics, both in vertical depth and temporal scale.
    Description
    Author Posting. © The Authors, 2008. This is the author's version of the work. It is posted here by permission of Blackwell for personal use, not for redistribution. The definitive version was published in Global Change Biology 15 (2009): 145-155, doi:10.1111/j.1365-2486.2008.01741.x.
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    • Ecosystems Center
    Suggested Citation
    Preprint: Tang, Jianwu, Bolstad, Paul V., Martin, Jonathan G., "Soil carbon fluxes and stocks in a Great Lakes forest chronosequence", 2008-07, https://doi.org/10.1111/j.1365-2486.2008.01741.x, https://hdl.handle.net/1912/2714
     

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