Identifying environmental drivers of greenhouse gas emissions under warming and reduced rainfall in boreal–temperate forests
Abstract
Abstract Atmospheric concentrations of carbon dioxide ( CO 2 ), methane ( CH 4 ) and nitrous oxide (N 2 O) are predicted to increase as a consequence of fossil fuel emissions and the impact on biosphere–atmosphere interactions. Forest ecosystems in general, and forest soils in particular, can be sinks or sources for CO 2 , CH 4 , and N 2 O. Environmental studies traditionally target soil temperature and moisture as the main predictors of soil greenhouse gas ( GHG ) flux from different ecosystems; however, these emissions are primarily biologically driven. Thus, little is known about the degree of regulation by soil biotic vs. abiotic factors on GHG emissions, particularly under predicted increase in global temperatures, and changes in intensity and frequency of precipitation events. Here we measured net CO 2 , CH 4 and N 2 O fluxes after 5 years of experimental warming (+3.4°C), and 2 years of ≈45% summer rainfall reduction, in two forest sites in a boreal–temperate ecotone under different habitat conditions (closed or open canopy) in Minnesota, USA . We evaluated the importance of microbial gene abundance and climo‐edaphic factors (soil texture, canopy, seasonality, climate, and soil physicochemical properties) driving GHG emissions. We found thatmore »
- Authors:
-
[6];
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia, Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USA
- Department of Ecology, Evolution &, Behaviour University of Minnesota Saint Paul MN USA
- Department of Soil, Water and Climate University of Minnesota Saint Paul MN USA, USDA‐ARS Soil &, Water Management Research Unit Saint Paul MN USA
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia, Department of Forest Resources University of Minnesota Saint Paul MN USA
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW Australia, Global Centre for Land‐based Innovation Western Sydney University Penrith NSW Australia
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1389098
- Grant/Contract Number:
- DE‐FG02‐07ER64456
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Functional Ecology
- Additional Journal Information:
- Journal Name: Functional Ecology Journal Volume: 31 Journal Issue: 12; Journal ID: ISSN 0269-8463
- Publisher:
- Wiley-Blackwell
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Martins, Catarina S. C., Nazaries, Loïc, Delgado‐Baquerizo, Manuel, Macdonald, Catriona A., Anderson, Ian C., Hobbie, Sarah E., Venterea, Rodney T., Reich, Peter B., Singh, Brajesh K., and Field, ed., Katie. Identifying environmental drivers of greenhouse gas emissions under warming and reduced rainfall in boreal–temperate forests. United Kingdom: N. p., 2017.
Web. doi:10.1111/1365-2435.12928.
Martins, Catarina S. C., Nazaries, Loïc, Delgado‐Baquerizo, Manuel, Macdonald, Catriona A., Anderson, Ian C., Hobbie, Sarah E., Venterea, Rodney T., Reich, Peter B., Singh, Brajesh K., & Field, ed., Katie. Identifying environmental drivers of greenhouse gas emissions under warming and reduced rainfall in boreal–temperate forests. United Kingdom. https://doi.org/10.1111/1365-2435.12928
Martins, Catarina S. C., Nazaries, Loïc, Delgado‐Baquerizo, Manuel, Macdonald, Catriona A., Anderson, Ian C., Hobbie, Sarah E., Venterea, Rodney T., Reich, Peter B., Singh, Brajesh K., and Field, ed., Katie. Mon .
"Identifying environmental drivers of greenhouse gas emissions under warming and reduced rainfall in boreal–temperate forests". United Kingdom. https://doi.org/10.1111/1365-2435.12928.
@article{osti_1389098,
title = {Identifying environmental drivers of greenhouse gas emissions under warming and reduced rainfall in boreal–temperate forests},
author = {Martins, Catarina S. C. and Nazaries, Loïc and Delgado‐Baquerizo, Manuel and Macdonald, Catriona A. and Anderson, Ian C. and Hobbie, Sarah E. and Venterea, Rodney T. and Reich, Peter B. and Singh, Brajesh K. and Field, ed., Katie},
abstractNote = {Abstract Atmospheric concentrations of carbon dioxide ( CO 2 ), methane ( CH 4 ) and nitrous oxide (N 2 O) are predicted to increase as a consequence of fossil fuel emissions and the impact on biosphere–atmosphere interactions. Forest ecosystems in general, and forest soils in particular, can be sinks or sources for CO 2 , CH 4 , and N 2 O. Environmental studies traditionally target soil temperature and moisture as the main predictors of soil greenhouse gas ( GHG ) flux from different ecosystems; however, these emissions are primarily biologically driven. Thus, little is known about the degree of regulation by soil biotic vs. abiotic factors on GHG emissions, particularly under predicted increase in global temperatures, and changes in intensity and frequency of precipitation events. Here we measured net CO 2 , CH 4 and N 2 O fluxes after 5 years of experimental warming (+3.4°C), and 2 years of ≈45% summer rainfall reduction, in two forest sites in a boreal–temperate ecotone under different habitat conditions (closed or open canopy) in Minnesota, USA . We evaluated the importance of microbial gene abundance and climo‐edaphic factors (soil texture, canopy, seasonality, climate, and soil physicochemical properties) driving GHG emissions. We found that changes in CO 2 fluxes were predominantly determined abiotically by temperature and moisture, after accounting for bacterial abundance. Methane fluxes on the other hand, were determined both abiotically, by gas diffusivity (via soil texture) and microbially, by methanotroph pmoA gene abundance, whereas, N 2 O emissions showed only a strong biotic regulation via ammonia‐oxidizing bacteria amoA gene abundance. Warming did not significantly alter CO 2 and CH 4 fluxes after 5 years of manipulation, while N 2 O emissions were greater with warming under open canopy. Our findings provide evidence that soil GHG emissions result from multiple direct and indirect interactions of microbial and abiotic drivers. Overall, this study highlights the need to include both microbial and climo‐edaphic properties in predictive models in order to provide improved mechanistic understanding for the development of future mitigation strategies. A plain language summary is available for this article.},
doi = {10.1111/1365-2435.12928},
journal = {Functional Ecology},
number = 12,
volume = 31,
place = {United Kingdom},
year = {Mon Jul 24 00:00:00 EDT 2017},
month = {Mon Jul 24 00:00:00 EDT 2017}
}
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https://doi.org/10.1111/1365-2435.12928
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