Why is Tree Drought Mortality so Hard to Predict?

Trends in Ecology & Evolution, Journal Year: 2021, Volume and Issue: 36(6), P. 520 - 532

Published: March 2, 2021

Language: Английский

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Increasing sensitivity of dryland vegetation greenness to precipitation due to rising atmospheric CO2

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Aug. 19, 2022

Water availability plays a critical role in shaping terrestrial ecosystems, particularly low- and mid-latitude regions. The sensitivity of vegetation growth to precipitation strongly regulates global dynamics their responses drought, yet changes response climate change remain poorly understood. Here we use long-term satellite observations combined with dynamic statistical learning approach examine the greenness over past four decades. We observe robust increase (0.624% yr−1) for drylands, decrease (−0.618% wet Using model simulations, show that contrasting trends between dry regions are caused by elevated atmospheric CO2 (eCO2). eCO2 universally decreases reducing leaf-level transpiration, However, this transpiration reduction is overridden at canopy scale large proportional leaf area. increased drylands implies potential ecosystem stability greater impacts droughts these vulnerable ecosystems under continued change. Changes may be hydroclimate dependent. authors reveal vs. wetter last 4 decades identify as major contributing factor.

Language: Английский

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The greater resilience of mixed forests to drought mainly depends on their composition: Analysis along a climate gradient across Europe

Forest Ecology and Management, Journal Year: 2020, Volume and Issue: 481, P. 118687 - 118687

Published: Oct. 28, 2020

Despite growing evidence that diverse forests play an important role in ecosystem functioning, ensuring the provision of different services, whether such diversity improves their response to drought events remains unclear. In this study, we use a large tree-ring database from thirty case studies across nine European countries and eleven species, covering Mediterranean hemiboreal forests, test if growth site specific occurred between 1975 2015 varied mixed monospecific stands. particular, quantify how stands resist those recover after them, thus analyzing resilience. For each event forest stand calculated resistance, recovery, resilience relative related variation these indices with type admixture, tree species identity, aridity gradient, basal area age. We found variability among studies, even for share similar composition have climates. On average, showed higher than However, beneficial effect mixtures could not be generalized, being greatly modulated by admixture depending on water supply characteristics, as The increase compared monocultures was greater conifer-broadleaved admixtures, lesser extent broadleaved-broadleaved combinations. observed patterns largely studied revealing importance functional traits understanding species' its distribution range. Along increased drier sites both stands, trend towards hotter sites. Our results confirm complexity relationships when comparing pure vs

Language: Английский

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Exacerbated drought impacts on global ecosystems due to structural overshoot

Nature Ecology & Evolution, Journal Year: 2021, Volume and Issue: 5(11), P. 1490 - 1498

Published: Sept. 30, 2021

Language: Английский

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Self-operating transpiration-driven electrokinetic power generator with an artificial hydrological cycle

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 13(2), P. 527 - 534

Published: Dec. 5, 2019

The artificial hydrological cycle built by using deliquescent calcium chloride enables self-operation of a transpiration-driven electrokinetic power generator.

Language: Английский

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