Canopy transpiration of a Larix sibirica and Pinus sylvestris forest in Central Siberia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F19%3A43915559" target="_blank" >RIV/62156489:43410/19:43915559 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.agrformet.2019.02.038" target="_blank" >https://doi.org/10.1016/j.agrformet.2019.02.038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agrformet.2019.02.038" target="_blank" >10.1016/j.agrformet.2019.02.038</a>

Result language

angličtina

Original language name

Canopy transpiration of a Larix sibirica and Pinus sylvestris forest in Central Siberia

Original language description

Russian boreal forests represent the largest forested region on Earth and comprise one-fifth of the world&apos;s forest cover. The two most common genera in Siberia are Larix and Pinus, which together cover more than 80% of the region&apos;s forested area. One observable ongoing effect of climate warming is that natural populations of Siberian larch are gradually being replaced by Scots pine. The present work focuses on comparing effects of environmental variables on sap flow density in two even-aged stands of Larix sibirica and Pinus sylvestris. While the two study stands were identical in age (49 years) with similar basal areas and leaf area index, they exhibited very different transpiration rates and response mechanisms to environmental signals. Stand water use was higher for larch than it was for pine, even though transpiration for deciduous larch trees occurred over shorter time periods. The cumulative annual transpiration of the larch stand was 284 +- 4 mm measured over two consecutive growing seasons (2015-2016), while for pine this was 20% lower. Seasonal transpiration accounted for 50% and 40% of the reference evapotranspiration and 91% and 67% of growing season precipitation for larch and pine, respectively. Water stored in soil provided an important source of water for transpiration, observed as roughly 100 mm, which was then replenished from snowmelt the following spring. The greatest difference between two species related to how well they controlled transpiration, notably in the context of high vapor pressure deficit; under these conditions, pine maintained greater control over transpiration than larch. For all soil moisture levels measured, larch transpired more water than pine. Importantly, our results point to potential future effects of global warming, most notably an increasing decline of larch forests, changes in the ratio between latent and sensitive heat fluxes, and significant modifications in ecosystem water availability.

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

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OECD FORD branch

40102 - Forestry

Project

—

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

Name of the periodical

Agricultural and Forest Meteorology

ISSN

0168-1923

e-ISSN

—

Volume of the periodical

271

Issue of the periodical within the volume

15 June

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

64-72

UT code for WoS article

000468709200007

EID of the result in the Scopus database

2-s2.0-85062303524