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dc.contributor.authorZiegler, Susan E.
dc.contributor.authorBenner, Ronald
dc.contributor.authorBillngs, Sharon A.
dc.contributor.authorEdwards, Kate A.
dc.contributor.authorPhilben, Michael
dc.contributor.authorZhu, Xinbiao
dc.contributor.authorLaganière, Jerome
dc.identifier.citationZiegler SE, Benner R, Billings SA, Edwards KA, Philben M, Zhu X and Laganière J. (2017) Climate Warming Can Accelerate Carbon Fluxes without Changing Soil Carbon Stocks. Front. Earth Sci. 5:2. doi: 10.3389/feart.2017.00002en_US
dc.description.abstractClimate warming enhances multiple ecosystem C fluxes, but the net impact of changing C fluxes on soil organic carbon (SOC) stocks over decadal to centennial time scales remains unclear. We investigated the effects of climate on C fluxes and soil C stocks using space-for-time substitution along a boreal forest climate gradient encompassing spatially replicated sites at each of three latitudes. All regions had similar SOC concentrations and stocks (5.6 to 6.7 kg C m−2). The three lowest latitude forests exhibited the highest productivity across the transect, with tree biomass:age ratios and litterfall rates 300 and 125% higher than those in the highest latitude forests, respectively. Likewise, higher soil respiration rates (~55%) and dissolved organic C fluxes (~300%) were observed in the lowest latitude forests compared to those in the highest latitude forests. The mid-latitude forests exhibited intermediate values for these indices and fluxes. The mean radiocarbon content (Δ14C) of mineral-associated SOC (+9.6‰) was highest in the lowest latitude forests, indicating a more rapid turnover of soil C compared to the mid- and highest latitude soils (Δ14C of −35 and −30‰, respectively). Indicators of the extent of soil organic matter decomposition, including C:N, δ13C, and amino acid and alkyl-C:O-alkyl-C indices, revealed highly decomposed material across all regions. These data indicate that the lowest latitude forests experience accelerated C fluxes that maintain relatively young but highly decomposed SOC. Collectively, these observations of within-biome soil C responses to climate demonstrate that the enhanced rates of SOC loss that typically occur with warming can be balanced on decadal to centennial time scales by enhanced rates of C inputs.en_US
dc.publisherFrontiers Mediaen_US
dc.rights© 2017 The Author(s).en_US
dc.titleClimate Warming Can Accelerate Carbon Fluxes without Changing Soil Carbon Stocksen_US
kusw.kuauthorBillings, Sharon, A.
kusw.kudepartmentEcology and Evolutionary Biologyen_US
kusw.oanotesPer SHERPA/RoMEO 10/26/2018: Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: green tick author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF: green tick author can archive publisher's version/PDF General Conditions: On open access repositories Authors retain copyright Creative Commons Attribution License Published source must be acknowledged with citation First publication by Frontiers Media must be acknowledged Publisher's version/PDF may be used Articles are placed in PubMed Central immediately on behalf of authors.en_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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