Thinning effect on soil respiration in Silver fir, Beech and Spruce predominating adult forest stands

Kód výsledku v IS VaVaI

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Výsledek na webu

<a href="https://ldf.mendelu.cz/uzpl/index.php/metodiky/category/51-proceedings-of-central-european-silviculture-2015" target="_blank" >https://ldf.mendelu.cz/uzpl/index.php/metodiky/category/51-proceedings-of-central-european-silviculture-2015</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thinning effect on soil respiration in Silver fir, Beech and Spruce predominating adult forest stands

Popis výsledku v původním jazyce

CO2 movement or CO2 flux out of the soil is the primary function of soil respiration; soil CO2 flux is a significant component of the total atmospheric carbon balance, a physical process driven primarily by the CO2 concentration diffusion gradient between the upper soil layers and the atmosphere near the soil surface. In three high karst forest complexes same spatial design was applied to observe the effect of silvicultural treatment - the degree of mature stand removal on soil efflux. In every forest complex nine subplots were established during the time of experiment according to predominating tree species in growing stock of the mature canopy stand - silver fir, Norway spruce and European beech. In 2012 silvicultural measures with different intensity were applied with 50% and 100% removal of growing stock around the centre of the plot with minimal diameter of two tree heights. The seasonal pattern of CO2 efflux rates was mostly accountable by changes in soil emperature. Simple exponential functions including temperature alone accounted relatively well for the spatial variability over the investigated forest stands. Spatial heterogeneity in CO2 efflux rates was clearly reflected in management practice, while higher soil respiration rates. A higher amount of aboveground litter associated with high decomposition rates is a good predictor of soil respiration rates. Release rates and recovery period were extreme in beech predominating sites, followed by the silver fir and norway spruce. It is our belef, that more oscillations may be expected in carbon release dynamics in the future, as the number of extreme weather events increases and the withdrawal of silver fir with its poor recruitment may have long term consequences on this high karst high productive sites.

Název v anglickém jazyce

Thinning effect on soil respiration in Silver fir, Beech and Spruce predominating adult forest stands

Popis výsledku anglicky

CO2 movement or CO2 flux out of the soil is the primary function of soil respiration; soil CO2 flux is a significant component of the total atmospheric carbon balance, a physical process driven primarily by the CO2 concentration diffusion gradient between the upper soil layers and the atmosphere near the soil surface. In three high karst forest complexes same spatial design was applied to observe the effect of silvicultural treatment - the degree of mature stand removal on soil efflux. In every forest complex nine subplots were established during the time of experiment according to predominating tree species in growing stock of the mature canopy stand - silver fir, Norway spruce and European beech. In 2012 silvicultural measures with different intensity were applied with 50% and 100% removal of growing stock around the centre of the plot with minimal diameter of two tree heights. The seasonal pattern of CO2 efflux rates was mostly accountable by changes in soil emperature. Simple exponential functions including temperature alone accounted relatively well for the spatial variability over the investigated forest stands. Spatial heterogeneity in CO2 efflux rates was clearly reflected in management practice, while higher soil respiration rates. A higher amount of aboveground litter associated with high decomposition rates is a good predictor of soil respiration rates. Release rates and recovery period were extreme in beech predominating sites, followed by the silver fir and norway spruce. It is our belef, that more oscillations may be expected in carbon release dynamics in the future, as the number of extreme weather events increases and the withdrawal of silver fir with its poor recruitment may have long term consequences on this high karst high productive sites.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of Central European Silviculture

ISBN

978-80-7509-308-0

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

154-163

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Křtiny

Datum konání akce

2. 9. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000466827400017