Drought limitation on tree growth at the Northern Hemisphere's highest tree line

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00113501" target="_blank" >RIV/00216224:14310/19:00113501 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1125786518301164" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1125786518301164</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.dendro.2018.11.006" target="_blank" >10.1016/j.dendro.2018.11.006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Drought limitation on tree growth at the Northern Hemisphere's highest tree line

Popis výsledku v původním jazyce

The alpine tree line is generally assumed to be controlled by low temperatures, and thus to be experiencing an upward shift under global warming. As global temperatures rise, tree growth at the tree line could either increase if temperature is the limiting factor or decrease if a warming-induced loss of moisture limits growth. Here, we use dendrochronological techniques to understand the abiotic drivers of the Northern Hemisphere's highest tree line ecotones on the southern Tibetan Plateau (TP). Ring-width measurements from three juniper sites between 4680 and 4900 m asl were significantly and negatively correlated with May-June-July evapotranspiration (ET0), and positively correlated with relative humidity and other moisture-related meteorological variables. At the same time, ring widths were negatively correlated with temperature means and sunshine rates. Our results highlight the common sensitivity of tree growth to moisture variations despite the differential growth trends occurring since 1850 (end of the Industrial Revolution) at the three tree line ecotones. These findings indicate that low temperatures may not be the sole driving force behind tree growth and the range dynamics of alpine tree lines. Tree lines in the dry parts of the TP and possibly also beyond are likely to retreat rather than to advance in a warmer world due to water limitations.

Název v anglickém jazyce

Drought limitation on tree growth at the Northern Hemisphere's highest tree line

Popis výsledku anglicky

The alpine tree line is generally assumed to be controlled by low temperatures, and thus to be experiencing an upward shift under global warming. As global temperatures rise, tree growth at the tree line could either increase if temperature is the limiting factor or decrease if a warming-induced loss of moisture limits growth. Here, we use dendrochronological techniques to understand the abiotic drivers of the Northern Hemisphere's highest tree line ecotones on the southern Tibetan Plateau (TP). Ring-width measurements from three juniper sites between 4680 and 4900 m asl were significantly and negatively correlated with May-June-July evapotranspiration (ET0), and positively correlated with relative humidity and other moisture-related meteorological variables. At the same time, ring widths were negatively correlated with temperature means and sunshine rates. Our results highlight the common sensitivity of tree growth to moisture variations despite the differential growth trends occurring since 1850 (end of the Industrial Revolution) at the three tree line ecotones. These findings indicate that low temperatures may not be the sole driving force behind tree growth and the range dynamics of alpine tree lines. Tree lines in the dry parts of the TP and possibly also beyond are likely to retreat rather than to advance in a warmer world due to water limitations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

DENDROCHRONOLOGIA

ISSN

1125-7865

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

FEB 2019

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

40-47

Kód UT WoS článku

000456177200007

EID výsledku v databázi Scopus

2-s2.0-85057483159