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Radial growth responses of two dominant conifers to climate in the Altai Mountains, Central Asia

Kang Jian, Jiang Shaowei, Tardif Jacques C., Liang Hanxue, Zhang Shaokang, Li Jingye, Yu Biyun, Bergeron Yves, Rossi Sergio, Wang Zhou, Zhou Peng et Huang Jian-Guo. (2021). Radial growth responses of two dominant conifers to climate in the Altai Mountains, Central Asia. Agricultural and Forest Meteorology, 298-299, e108297.

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URL officielle: http://dx.doi.org/doi:10.1016/j.agrformet.2020.108...

Résumé

The boreal forests of Central Asia play a vital role in biodiversity protection and regional economic development. It is important to study potential changes in the growth dynamics of boreal species in a context of global change. In this study, we developed a network of 34 tree-ring chronologies for two tree species, Siberian larch (Larix sibirica Ledeb.) and Siberian pine (Pinus sibirica Du Tour). The network extended across a large latitudinal gradient (45°N to 55°N). Principal component analysis (PCA) was used to detect spatial patterns in tree radial growth during a common period 1943–2004. Results indicated an obvious clustering pattern with chronologies being divided into a northeastern (NR) and a southwestern (SR) region. Bootstrapped correlation analyses of regional climate versus aggregated chronologies showed that tree radial growth in both regions was positively associated with summer temperature (June and July). Tree radial growth in the northeastern region was however positively associated with early spring precipitation and spring Palmer Drought Severity Index (PDSI) whereas, in the southwestern region, it was characterized by negative correlations with early summer precipitation and summer PDSI. The warm pool El Niño-Southern Oscillation (WP ENSO) and North Atlantic Oscillation (NAO) regulated tree radial growth through their influence on regional precipitation and temperature. Results suggest that tree radial growth in the region may decline with future projected climate change. This study provides a more comprehensive understanding to tree growth-climate associations across Central Asia.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:01681923
Volume:298-299
Pages:e108297
Version évaluée par les pairs:Oui
Date:15 Mars 2021
Identifiant unique:10.1016/j.agrformet.2020.108297
Sujets:Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie
Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Mots-clés:boreal forest, spatial patterns, Central Asia, tree radial growth, ENSO, NAO
Déposé le:05 juin 2023 13:01
Dernière modification:05 juin 2023 13:01
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