2023
DOI: 10.1002/eco.2596
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Geophysics reveals forest vulnerability to drought

Gavan S. McGrath,
Joe B. Fontaine,
Ricky Van Dongen
et al.

Abstract: Drought and heat‐induced forest die‐off are being increasingly reported across the planet. As vulnerable areas tend to have thin soils and poor water holding capacities, quantification of soil depth thresholds, relative to drought intensity, has global implications for identifying forest areas at risk. Measuring soil depth at forest stand or regional scales is, however, difficult. Our aim was to quantify soil thickness across drought impacted forest stands using geophysics. We asked whether impacted sites had … Show more

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Cited by 5 publications
(2 citation statements)
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“…Gazol and Camarero (2022) conclude that since summer temperatures and the frequency of droughts are rising, more forests will become vulnerable to compound climate extremes and tree mortality will become a more important driver of forest dynamics. Vegetation responses to heatwave and drought will also be mediated strongly by local site factors linked to soil depth, texture and water-holding capacity (McGrath et al 2023).…”
Section: Heatwaves and Fuel Availabilitymentioning
confidence: 99%
“…Gazol and Camarero (2022) conclude that since summer temperatures and the frequency of droughts are rising, more forests will become vulnerable to compound climate extremes and tree mortality will become a more important driver of forest dynamics. Vegetation responses to heatwave and drought will also be mediated strongly by local site factors linked to soil depth, texture and water-holding capacity (McGrath et al 2023).…”
Section: Heatwaves and Fuel Availabilitymentioning
confidence: 99%
“…1) associated with extreme climatic conditions, including a heatwavecompounded drought (Matusick et al 2013). The die-off was most common on sites containing rocky soils with low water-holding capacity, at high elevations, on steep slopes surrounding rock outcrops, in xeric areas (Brouwers et al 2013;Andrew et al 2016), with shallow bedrock and thin soils (McGrath et al 2023), and most severe on sites experiencing a long-term precipitation decline (Matusick et al 2018). Forest vegetation surrounding rock outcrops experiences waterlogging during precipitation events, and excessive soil drying during drought (Withers 2000;Schut et al 2014).…”
Section: Introductionmentioning
confidence: 99%