Greenhouse gas emissions from boreal inland waters unchanged after forest harvesting
-
Published:2018-09-19
Issue:18
Volume:15
Page:5575-5594
-
ISSN:1726-4189
-
Container-title:Biogeosciences
-
language:en
-
Short-container-title:Biogeosciences
Author:
Klaus Marcus, Geibrink Erik, Jonsson Anders, Bergström Ann-Kristin, Bastviken DavidORCID, Laudon HjalmarORCID, Klaminder Jonatan, Karlsson Jan
Abstract
Abstract. Forestry practices often result in an increased export of carbon
and nitrogen to downstream aquatic systems. Although these losses affect the
greenhouse gas (GHG) budget of managed forests, it is unknown if they modify
GHG emissions of recipient aquatic systems. To assess this question,
air–water fluxes of carbon dioxide (CO2), methane (CH4) and
nitrous oxide (N2O) were quantified for humic lakes and their inlet
streams in four boreal catchments using a
before-after control-impact experiment. Two catchments were treated with
forest clear-cuts followed by site preparation (18 % and 44 % of the
catchment area). GHG fluxes and hydrological and physicochemical water
characteristics were measured at multiple locations in lakes and streams at
high temporal resolution throughout the summer season over a 4-year
period. Both lakes and streams evaded all GHGs. The treatment did not
significantly change GHG fluxes in streams or lakes within 3 years after
the treatment, despite significant increases of CO2 and CH4
concentrations in hillslope groundwater. Our results highlight that GHGs
leaching from forest clear-cuts may be buffered in the riparian zone–stream
continuum, likely acting as effective biogeochemical processors and wind
shelters to prevent additional GHG evasion via downstream inland waters.
These findings are representative of low productive forests located in
relatively flat landscapes where forestry practices cause only a limited
initial impact on catchment hydrology and biogeochemistry.
Funder
Svenska Forskningsrådet Formas Kempestiftelserna Vetenskapsrådet Swedish Foundation for International Cooperation in Research and Higher Education European Research Council
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
Reference114 articles.
1. Andréassian, V.: Waters and forests: From historical controversy to
scientific debate, J. Hydrol., 291, 1–27, https://doi.org/10.1016/j.jhydrol.2003.12.015,
2004. 2. Ask, J., Karlsson, J., and Jansson, M.: Net ecosystem production in
clear-water and brown-water lakes, Global Biogeochem. Cy., 26, 1–7,
https://doi.org/10.1029/2010GB003951, 2012. 3. Bastviken, D.: Methane, in: Encyclopedia of Inland Waters, edited by: Likens,
G. E., Elsevier, Oxford, 2009. 4. Bastviken, D., Cole, J., Pace, M., and Tranvik, L.: Methane emissions from
lakes: Dependence of lake characteristics, two regional assessments, and a
global estimate, Global Biogeochem. Cy., 18, 1–12, https://doi.org/10.1029/2004GB002238,
2004. 5. Bastviken, D., Cole, J. J., Pace, M. L., and Van de-Bogert, M. C.: Fates of
methane from different lake habitats: Connecting whole-lake budgets and
CH4 emissions, J. Geophys. Res.-Biogeo., 113, 1–13,
https://doi.org/10.1029/2007JG000608, 2008.
Cited by
16 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|