Environmental drivers of increased ecosystem respiration in a warming tundra

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A100115" target="_blank" >RIV/60460709:41330/24:100115 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41586-024-07274-7" target="_blank" >http://dx.doi.org/10.1038/s41586-024-07274-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41586-024-07274-7" target="_blank" >10.1038/s41586-024-07274-7</a>

Result language

angličtina

Original language name

Environmental drivers of increased ecosystem respiration in a warming tundra

Original language description

Arctic and alpine tundra ecosystems are large reservoirs of organic carbon 1,2 . Climate warming may stimulate ecosystem respiration and release carbon into the atmosphere 3,4 . The magnitude and persistency of this stimulation and the environmental mechanisms that drive its variation remain uncertain 5-7 . This hampers the accuracy of global land carbon-climate feedback projections 7,8 . Here we synthesize 136 datasets from 56 open-top chamber in situ warming experiments located at 28 arctic and alpine tundra sites which have been running for less than 1 year up to 25 years. We show that a mean rise of 1.4 degrees C [confidence interval (CI) 0.9-2.0 degrees C] in air and 0.4 degrees C [CI 0.2-0.7 degrees C] in soil temperature results in an increase in growing season ecosystem respiration by 30% [CI 22-38%] (n = 136). Our findings indicate that the stimulation of ecosystem respiration was due to increases in both plant-related and microbial respiration (n = 9) and continued for at least 25 years (n = 136). The magnitude of the warming effects on respiration was driven by variation in warming-induced changes in local soil conditions, that is, changes in total nitrogen concentration and pH and by context-dependent spatial variation in these conditions, in particular total nitrogen concentration and the carbon:nitrogen ratio. Tundra sites with stronger nitrogen limitations and sites in which warming had stimulated plant and microbial nutrient turnover seemed particularly sensitive in their respiration response to warming. The results highlight the importance of local soil conditions and warming-induced changes therein for future climatic impacts on respiration. Datasets from in situ warming experiments across 28 arctic and alpine tundra sites covering a span of less than 1 year up to 25 years show the importance of local soil conditions and warming-induced changes therein for future climatic impacts on ecosystem respiration.

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

10618 - Ecology

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

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

Name of the periodical

NATURE

ISSN

0028-0836

e-ISSN

0028-0836

Volume of the periodical

629

Issue of the periodical within the volume

8010

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

21

Pages from-to

105-125

UT code for WoS article

001207592700001

EID of the result in the Scopus database

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