HilasvuoriBerninger2010

Référence

Hilasvuori, E. and Berninger, F. (2010) Dependence of tree ring stable isotope abundances and ring width on climate in Finnish oak. Tree Physiology, 30(5):636-647. (Scopus )

Résumé

We measured ring widths and isotopic abundances of carbon, oxygen and hydrogen (δ<sup>13</sup>C, δ<sup>18</sup>O and δ<sup>2</sup>H) from the latewood of tree rings of pedunculate oak (Quercus robur L.) in its distributional northern limit in Southern Finland. Ring width was observed to be related to precipitation and relative humidity but not significantly to temperature. δ<sup>13</sup>C and δ<sup>18</sup>O were significantly related to all studied climatic variables, most strongly to cloud cover. Variations in δ<sup>2</sup>H were discovered to be complex combinations of signals from biochemical and physical processes. The results suggest that oaks in Finland can be used as a source of climate information. δ<sup>18</sup>O was discovered to be especially promising as it showed the strongest climate signal and highest common signal between trees. The relationship between climate and ring width indicates that water availability is the main control of ring radial growth. This is supported by the isotope data. High correlation between δ<sup>13</sup>C and δ<sup>18</sup>O time series indicates that photosynthetic carbon assimilation is limited by stomatal control. Therefore, in contrast to the expected temperature limitation, our data indicate that drought limits oak growth more than cold temperatures on the border of its northernmost distribution range. © The Author 2010. Published by Oxford University Press. All rights reserved.

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@ARTICLE { HilasvuoriBerninger2010,
    AUTHOR = { Hilasvuori, E. and Berninger, F. },
    TITLE = { Dependence of tree ring stable isotope abundances and ring width on climate in Finnish oak },
    JOURNAL = { Tree Physiology },
    YEAR = { 2010 },
    VOLUME = { 30 },
    PAGES = { 636-647 },
    NUMBER = { 5 },
    ABSTRACT = { We measured ring widths and isotopic abundances of carbon, oxygen and hydrogen (δ<sup>13</sup>C, δ<sup>18</sup>O and δ<sup>2</sup>H) from the latewood of tree rings of pedunculate oak (Quercus robur L.) in its distributional northern limit in Southern Finland. Ring width was observed to be related to precipitation and relative humidity but not significantly to temperature. δ<sup>13</sup>C and δ<sup>18</sup>O were significantly related to all studied climatic variables, most strongly to cloud cover. Variations in δ<sup>2</sup>H were discovered to be complex combinations of signals from biochemical and physical processes. The results suggest that oaks in Finland can be used as a source of climate information. δ<sup>18</sup>O was discovered to be especially promising as it showed the strongest climate signal and highest common signal between trees. The relationship between climate and ring width indicates that water availability is the main control of ring radial growth. This is supported by the isotope data. High correlation between δ<sup>13</sup>C and δ<sup>18</sup>O time series indicates that photosynthetic carbon assimilation is limited by stomatal control. Therefore, in contrast to the expected temperature limitation, our data indicate that drought limits oak growth more than cold temperatures on the border of its northernmost distribution range. © The Author 2010. Published by Oxford University Press. All rights reserved. },
    COMMENT = { Export Date: 27 May 2010 Source: Scopus CODEN: TRPHE doi: 10.1093/treephys/tpq019 },
    ISSN = { 0829318X (ISSN) },
    KEYWORDS = { Carbon, Dendroclimatology, Fennoscandia, Hydrogen, Oxygen, Quercus robur L. },
    OWNER = { Luc },
    TIMESTAMP = { 2010.05.27 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-77951728940&partnerID=40&md5=75371ad7bcf6425e082d27a985834ebd },
}

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