SEASONAL DYNAMICS OF N2O AND CH4 FLUXES OF BOREAL TREE STEMS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F19%3A00517361" target="_blank" >RIV/86652079:_____/19:00517361 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

SEASONAL DYNAMICS OF N2O AND CH4 FLUXES OF BOREAL TREE STEMS

Original language description

Boreal forest soils are a natural source of nitrous oxide (N2O) and a sink of methane (CH4). Trees can contribute to ecosystem N2O and CH4 exchange (1) by transporting the gases from soil to the atmosphere, (2) by producing these gases in situ in the plant tissues, (3) by consuming these gases from the atmosphere, or (4) indirectly by altering the soil biochemical or physical conditions. Studies on the N2O and CH4 exchange of mature trees growing in natural field conditions are rare, and the boreal zone trees have not gained much attention. Studies on the seasonality of the tree CH4 and N2O fluxes have been lacking. We measured the stem fluxes of N2O and CH4 from mature pine, spruce and birch trees at three plots with naturally different soil moisture ( soil volumetric water content): Wet (0.81 m 3 m −3 ), moderately wet (0.40 m 3 m −3 ), and dry (0.21 m 3 m −3 ). The fluxes were determined between June 2014 and May 2015, using static chambers and gas chromatographic analyses. There were significant seasonal dynamics in the stem N2O and CH4 exchange. The N2O exchange was clearly connected to the tree physiological activity, while the CH4 flux had only weak relation to physiological activity. Positive correlation between N2O flux and evapotranspiration supports our hypothesis that N2O is transported from soil via the transpiration stream. The CH4 fluxes of birch and pine trees were clearly connected to the soil moisture, unlike the spruce fluxes. The forest floor was a source of N2O at all plots, while the CH4 flux was connected to the soil moisture (wet plot was a source, other plots were sinks).

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GJ17-18112Y" target="_blank" >GJ17-18112Y: Methane and nitrous oxide fluxes in different tree species of temperate and boreal forest</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

REPORT SERIES IN AEROSOL SCIENCE - Proceedings of The Center of Excellence in Atmospheric Science (CoE ATM)

ISBN

978-952-7276-34-1

ISSN

0784-3496

e-ISSN

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Number of pages

3

Pages from-to

423-426

Publisher name

Aerosolitutkimusseura ry – Finnish Association for Aerosol Research FAAR

Place of publication

Helsinki

Event location

Helsinki

Event date

Nov 25, 2019

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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