Scopus: 1 citations, Web of Science: 0 citations,
Sequence of plant responses to droughts of different timescales : lessons from holm oak (Quercus ilex) forests
Barbeta i Margarit, Adrià (Centre de Recerca Ecològica i Aplicacions Forestals)
Peñuelas, Josep (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Date: 2016
Abstract: The functional traits of plants in regions of the world with a Mediterranean climate have been shaped to tolerate periods of water deficit. These species are adapted to summer droughts but may not be able to cope with future increases in drought intensity, duration, and/or frequency. Here, we review the mechanisms and traits of drought resistance and recovery of the well-studied holm oak (Quercus ilex), which we propose as a model species for Mediterranean-type ecosystems. Our aim was to understand the differences and links between the responses of Q. ilex to summer droughts, extreme droughts, and long-term drought experiments. A main goal was to provide an integral picture of drought responses across organisational and temporal scales for identifying the most relevant processes that are likely to contribute to determining the future of Mediterranean vegetation. Evidence from long-term drought experiments showed that acclimation processes from the molecular (e. g. epigenetic changes) to the ecosystem level (e. g. reductions in stand density) mitigate the effects of drought. Changes in leaf morphology and hydraulics, leaf-to-shoot allometry, and root functioning are among the key mechanisms for overcoming increasing drought. The duration of drought determines its severity in terms of canopy loss and stem mortality. Although Q. ilex can vigorously resprout after such episodes, its resilience may be subsequently reduced. In the future, higher frequency of return of extreme droughts will challenge thus the capacity of these forests to recover. The insights provided by this review of the complex interplay of processes that determine the response of trees to droughts of different duration, intensity, and frequency will also help us to understand the likely responses of other resprouting angiosperms in seasonally dry ecosystems that share similar functional traits with Q. ilex.
Note: imbalance-P paper conctact with Adrià Barbeta: a.barbeta@creaf.uab.cat
Note: Número d'acord de subvenció EC/FP7/610028
Note: Número d'acord de subvenció MINECO/GGL2013/48074-P
Note: Número d'acord de subvenció MINECO/BES-2011-043314
Note: Número d'acord de subvenció AGAUR/2014/SGR-274
Rights: Tots els drets reservats
Language: Anglès
Document: article ; recerca ; acceptedVersion
Subject: Acclimation ; Climate change ; Defoliation ; Drought stress ; Quercus ilex ; Temporal scales ; Water availability
Published in: Plant ecology and diversity, Vol. 9, issue 4 (2016) , ISSN 1755-0874

DOI: 10.1080/17550874.2016.1212288


Available from: 2017-12-30
Post-print

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles

 Record created 2017-02-07, last modified 2017-06-22



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