Declining tree growth resilience mediates subsequent forest mortality in the US Mountain West

© 2023 John Wiley & Sons Ltd.

Détails bibliographiques
Publié dans:Global change biology. - 1999. - 29(2023), 17 vom: 05. Sept., Seite 4826-4841
Auteur principal: Cabon, Antoine (Auteur)
Autres auteurs: DeRose, R Justin, Shaw, John D, Anderegg, William R L
Format: Article en ligne
Langue:English
Publié: 2023
Accès à la collection:Global change biology
Sujets:Journal Article Lloret indices drought forest mortality growth insect outbreak resilience tree-ring
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520 |a Climate change-triggered forest die-off is an increasing threat to global forests and carbon sequestration but remains extremely challenging to predict. Tree growth resilience metrics have been proposed as measurable proxies of tree susceptibility to mortality. However, it remains unclear whether tree growth resilience can improve predictions of stand-level mortality. Here, we use an extensive tree-ring dataset collected at ~3000 permanent forest inventory plots, spanning 13 dominant species across the US Mountain West, where forests have experienced strong drought and extensive die-off has been observed in the past two decades, to test the hypothesis that tree growth resilience to drought can explain and improve predictions of observed stand-level mortality. We found substantial increases in growth variability and temporal autocorrelation as well declining drought resistance and resilience for a number of species over the second half of the 20th century. Declining resilience and low tree growth were strongly associated with cross- and within-species patterns of mortality. Resilience metrics had similar explicative power compared to climate and stand structure, but the covariance structure among predictors implied that the effect of tree resilience on mortality could partially be explained by stand and climate variables. We conclude that tree growth resilience offers highly valuable insights on tree physiology by integrating the effect of stressors on forest mortality but may have only moderate potential to improve large-scale projections of forest die-off under climate change 
650 4 |a Journal Article 
650 4 |a Lloret indices 
650 4 |a drought 
650 4 |a forest mortality 
650 4 |a growth 
650 4 |a insect outbreak 
650 4 |a resilience 
650 4 |a tree-ring 
700 1 |a DeRose, R Justin  |e verfasserin  |4 aut 
700 1 |a Shaw, John D  |e verfasserin  |4 aut 
700 1 |a Anderegg, William R L  |e verfasserin  |4 aut 
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