The roles of hydraulic and carbon stress in a widespread climate-induced forest die-off

By William R. L. Anderegg, Joseph A. Berry, Duncan D Smith, J. Sperry, L. Anderegg, Christopher B. Field. Proceedings of the National Academy of Sciences of the United States of America, 2011

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Response of vegetation to drought time-scales across global land biomes (2012, background): “Boreal and cool temperate moist forests are thus highly sensitive to drought (28), an indicator that tree species dominating these forests do not tolerate water deficits (29).”
Frost hardiness vs. growth performance in trembling aspen: an experimental test of assisted migration (2013, background): “Climate change towards warmer and drier conditions appears to be the primary driver of the observed aspen decline, amplified by other factors such as forest pests, fire suppression policies and other management practices (Marchetti, Worrall & Eager 2011; Anderegg et al. 2012; Worrall et al. 2013).”
How do trees die? A test of the hydraulic failure and carbon starvation hypotheses (2013, background): “Mechanisms of vegetation mortality during drought and their impact on survival, however, are strongly debated due to a lack of direct tests (Adams et al. 2009; McDowell & Sevanto 2010; Sala et al. 2010; McDowell 2011; Anderegg et al. 2012).”
Species-specific water use by forest tree species: from the tree to the stand (2012, result): “The expected depletion of carbon balance with water stress is not always in accordance with empirical data (Körner, 2003; Villar-Salvador et al., 2004; William et al., 2012).”