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Warm, Dry Conditions Inhibit Aspen Growth, But Tree Growth and Size Predict Mortality Risk in the Southwestern United States

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  • معلومة اضافية
    • Contributors:
      Canadian Science Publishing
    • بيانات النشر:
      Hosted by Utah State University Libraries
    • الموضوع:
      2020
    • Collection:
      Utah State University: DigitalCommons@USU
    • نبذة مختصرة :
      Widespread, rapid aspen (Populus tremuloides Michx.) mortality since the beginning of the 21st century, sometimes called sudden aspen decline (SAD), has been documented in many locations across North America, but it has been particularly pronounced in the southwestern United States. We investigated the relationship among aspen growth, mortality, and climate across three forest types in northern Arizona using cross-dated tree-ring samples from 126 live and 132 dead aspens. Aspen growth was negatively correlated with warm temperatures and positively associated with higher precipitation. Using survival analysis techniques to investigate the links between aspen mortality, tree traits, and climatic conditions, we found that tree traits played a larger role in mortality risk than climate factors. Trees with larger diameters, older trees, and trees with faster growth rates over the past 50 years had a reduced risk of mortality. Management actions aimed at maintaining the most vigorous, fastest growing aspen in the region could help mitigate the impacts of a warmer, drier future.
    • Relation:
      https://digitalcommons.usu.edu/aspen_bib/7894; https://doi.org/10.1139/cjfr-2019-0222
    • الرقم المعرف:
      10.1139/cjfr-2019-0222
    • الدخول الالكتروني :
      https://digitalcommons.usu.edu/aspen_bib/7894
      https://doi.org/10.1139/cjfr-2019-0222
    • Rights:
      Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu.
    • الرقم المعرف:
      edsbas.3D2514B1