Seasonally varying relationship between stem respiration, increment and carbon allocation of Norway spruce trees

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43918094" target="_blank" >RIV/62156489:43410/20:43918094 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1093/treephys/tpaa039" target="_blank" >https://doi.org/10.1093/treephys/tpaa039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/treephys/tpaa039" target="_blank" >10.1093/treephys/tpaa039</a>

Result language

angličtina

Original language name

Seasonally varying relationship between stem respiration, increment and carbon allocation of Norway spruce trees

Original language description

Stem respiration is an important component of an ecosystem&apos;s carbon budget. Beside environmental factors, it depends highly on tree energy demands for stem growth. Determination of the relationship between stem growth and stem respiration would help to reveal the response of stem respiration to changing climate, which is expected to substantially affect tree growth. Common measurement of stem radial increment does not record all aspects of stem growth processes, especially those connected with cell wall thickening; therefore, the relationship between stem respiration and stem radial increment may vary depending on the wood cell growth differentiation phase. This study presents results from measurements of stem respiration and increment carried out for seven growing seasons in a young Norway spruce forest. Moreover, rates of carbon allocation to stems were modeled for these years. Stem respiration was divided into maintenance (Rm) and growth respiration (Rg) based upon the mature tissue method. There was a close relationship between Rg and daily stem radial increment (dSRI), and this relationship differed before and after dSRI seasonal maximum, which was around 19 June. Before this date, Rg increased exponentially with dSRI, while after this date logarithmically. This is a result of later maxima of Rg and its slower decrease when compared with dSRI, which is connected with energy demands for cell wall thickening. Rg reached a maxima at the end of June or in July. The maximum of carbon allocation to stem peaked in late summer, when Rg mostly tended to decrease. The overall contribution of Rg to stem CO2 efflux amounted to 46.9% for the growing period from May to September and 38.2% for the year as a whole. This study shows that further deeper analysis of in situ stem growth and stem respiration dynamics is greatly needed, especially with a focus on wood formation on a cell level.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Tree Physiology

ISSN

0829-318X

e-ISSN

—

Volume of the periodical

40

Issue of the periodical within the volume

7

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

943-955

UT code for WoS article

000591566200010

EID of the result in the Scopus database

2-s2.0-85087466538