OlsHofgaardBergeronEtAl2016

Référence

Ols, C., Hofgaard, A., Bergeron, Y., Drobyshev, I. (2016) Previous growing season climate controls the occurrence of black spruce growth anomalies in boreal forests of Eastern Canada. Canadian Journal of Forest Research, 46(5):696-705. (Scopus )

Résumé

To better understand climatic origins of annual tree-growth anomalies in boreal forests, we analysed 895 black spruce (Picea mariana (Mill.) B.S.P.) tree-growth series from 46 xeric sites situated along three latitudinal transects in Eastern Canada. We identified interannual (based on comparison with previous year growth) and multidecadal (based on the entire tree-ring width distribution) growth anomalies between 1901 and 2001 at site and transect levels. Growth anomalies occurred mainly at site level and seldom at larger spatial scales. Both positive interannual and multidecadal growth anomalies were strongly associated with below-average temperatures and above-average precipitation during the previous growing season (Junet –1 – Augustt –1). The climatic signature of negative interannual and multidecadal growth anomalies was more complex and mainly associated with current-year climatic anomalies. Between the early and late 20th century, only negative multidecadal anomalies became more frequent. Our results highlight the role of previous growing season climate in controlling tree growth processes and suggest a positive association between climate warming and increases in the frequency of negative multidecadal growth anomalies. Projected climate change may further favour the occurrence of tree-growth anomalies and enhance the role of site conditions as modifiers of tree response to regional climate change. © 2016 NRC Research Press.

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@ARTICLE { OlsHofgaardBergeronEtAl2016,
    AUTHOR = { Ols, C. and Hofgaard, A. and Bergeron, Y. and Drobyshev, I. },
    TITLE = { Previous growing season climate controls the occurrence of black spruce growth anomalies in boreal forests of Eastern Canada },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2016 },
    VOLUME = { 46 },
    PAGES = { 696-705 },
    NUMBER = { 5 },
    NOTE = { cited By 0 },
    ABSTRACT = { To better understand climatic origins of annual tree-growth anomalies in boreal forests, we analysed 895 black spruce (Picea mariana (Mill.) B.S.P.) tree-growth series from 46 xeric sites situated along three latitudinal transects in Eastern Canada. We identified interannual (based on comparison with previous year growth) and multidecadal (based on the entire tree-ring width distribution) growth anomalies between 1901 and 2001 at site and transect levels. Growth anomalies occurred mainly at site level and seldom at larger spatial scales. Both positive interannual and multidecadal growth anomalies were strongly associated with below-average temperatures and above-average precipitation during the previous growing season (Junet –1 – Augustt –1). The climatic signature of negative interannual and multidecadal growth anomalies was more complex and mainly associated with current-year climatic anomalies. Between the early and late 20th century, only negative multidecadal anomalies became more frequent. Our results highlight the role of previous growing season climate in controlling tree growth processes and suggest a positive association between climate warming and increases in the frequency of negative multidecadal growth anomalies. Projected climate change may further favour the occurrence of tree-growth anomalies and enhance the role of site conditions as modifiers of tree response to regional climate change. © 2016 NRC Research Press. },
    AUTHOR_KEYWORDS = { Adaptive capacity; Climate change; Ecological resilience; Forest productivity; Growth sensitivity },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/cjfr-2015-0404 },
    KEYWORDS = { Forestry, Adaptive capacity; Climate warming; Climatic anomalies; Ecological resilience; Forest productivity; Regional climate changes; Site conditions; Tree-ring width, Climate change, Picea mariana },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964780697&partnerID=40&md5=cc39d899ae2447db9264f7898f52691b },
}

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