Environmental drivers of increased ecosystem respiration in a warming tundra

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Environmental drivers of increased ecosystem respiration in a warming tundra

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Environmental drivers of increased ecosystem respiration in a warming tundra

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10618 - Ecology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

NATURE

ISSN

0028-0836

e-ISSN

0028-0836

Svazek periodika

629

Číslo periodika v rámci svazku

8010

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

21

Strana od-do

105-125

Kód UT WoS článku

001207592700001

EID výsledku v databázi Scopus

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