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Differential effects of biomass burning on carbon and nutrient dynamics in Arctic fluvial ecosystems


Authors: Bianca Rodriguez-Cardona · Ashley A. Coble · Adam Wymore · Roman Kolosov · David C. Podgorski · Phoebe Zito · Robert G.M. Spencer · Anatoly S. Prokushkin · William McDowell
Owners: Jody Potter
DOI:10.4211/hs.5af38c0096014e3c96adecb92bc6e26d How to Cite
Resource type:Composite Resource
Created:Jun 15, 2018 at 4:54 p.m.
Last updated: Jun 16, 2018 at midnight by Jody Potter

Abstract

The Central Siberia Plateau (CSP) is undergoing rapid climate change resulting in increasing frequency of forest fires, which have uncertain effects on organic matter and nutrient delivery from headwater streams to downstream ecosystems. Across a fire chronosequence (3 to >100 years) underlain by continuous permafrost, we quantified the effects of wildfire on quantity and quality of dissolved organic matter (DOM) and inorganic nutrients in streams. Wildfire decreased DOM concentrations for about 50 years, but elevated nitrate (NO3-) concentrations lasted only 10 years; ammonium and phosphate concentrations were unchanged. This increase in NO3- and decrease in dissolved organic carbon (DOC) results in a wide range of DOC:NO3-, a ratio that is known to regulate NO3- uptake and denitrification in streams. Ultrahigh-resolution mass spectrometry and DOM optical properties showed that the composition of stream DOM changes after fire, with decreased abundance of polyphenols and aliphatic forms of DOM that are typically more biolabile than other forms of OM. Increasing wildfire frequency is thus likely to have major shifts in the metabolism, carbon flux, and nutrient balance of Arctic fluvial systems.

Subject Keywords

DOM,DOC,Arctic biogeochemistry,streams,forest fires,NO3

How to cite

Rodriguez-Cardona, B., A. A. Coble, A. Wymore, R. Kolosov, D. C. Podgorski, P. Zito, R. G. Spencer, A. S. Prokushkin, W. McDowell (2018). Differential effects of biomass burning on carbon and nutrient dynamics in Arctic fluvial ecosystems, HydroShare, https://doi.org/10.4211/hs.5af38c0096014e3c96adecb92bc6e26d

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    Coverage

    Spatial:

     Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
     Coordinate Units:  Decimal degrees
    Place/Area Name: Tura, Krasnoyarsk Krai Region, Russia

    Longitude
    100.1966°
    Latitude
    64.2877°

    Temporal:

     Start Date:
     End Date:

    Content

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    Authors

    The people or organizations that created the intellectual content of the resource.

    Name Organization Address Phone Author Identifiers
    Bianca Rodriguez-Cardona UNIVERSITY OF NEW HAMPSHIRE 56 College Rd, Durham, NH 03824 6038622341
    Ashley A. Coble National Council for Air and Stream Improvement, Inc. 227 NW Third Street , Corvallis, OR 97330 (541)752-8801
    Adam Wymore UNIVERSITY OF NEW HAMPSHIRE 56 College Rd, Durham, NH 03824 6038622341
    Roman Kolosov V.N. Sukachev Institute of Forest SB RAS Krasnoyarsk, Russia
    David C. Podgorski University of New Orleans New Orleans, LA
    Phoebe Zito University of New Orleans New Orleans, LA
    Robert G.M. Spencer Florida State University 303 Oceanography Building, Tallahassee, FL 32306 +1-850-645-0955
    Anatoly S. Prokushkin 3V.N. Sukachev Institute of Forest SB RAS Krasnoyarsk, Russia
    William McDowell

    Credits

    This resource was created using funding from the following sources:
    Agency Name Award Title Award Number
    National Science Foundation Crossing the boundaries of Critical Zone science with a virtual institute (SAVI) ICER 14-45246
    National Science Foundation Deciphering the role of dissolved organic nitrogen in stream nutrient cycling DEB-1556603
    Russian Foundation for Basic Research (RFBR) Small catchments within the continuous permafrost zone of Central Siberia: the role of wildfire and forest succession in stream biogeochemistry #14-05-00420
    Russian Science Foundation (RSF) Sensitivity of carbon fluxes in land-atmosphere-hydrosphere system of Yenisey River catchment to climate variability #14-24-00113
    National Science Foundation DMR-1157490

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