Long-term experimental drought combined with natural extremes accelerate vegetation shift in a Mediterranean holm oak forest
Liu, Daijun (Centre de Recerca Ecològica i Aplicacions Forestals)
Ogaya Inurrigarro, Romà (Centre de Recerca Ecològica i Aplicacions Forestals)
Barbeta i Margarit, Adrià (Centre de Recerca Ecològica i Aplicacions Forestals)
Yang, Xiaohong (Xi nan da xue (China). Key Laboratory of Horticulture Science for Southern Mountainous Regions.)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Data: 2018
Resum: Increasing drought combined with natural extremes are expected to accelerate forest die-off and shifts in vegetation in the Mediterranean Basin. However, fewer studies have explored these climate-driven changes in forest ecosystems. A long-term (17-year) experimental drought (−30% precipitation) was established in a Mediterranean holm oak forest with high (H) and low (L) canopies to determine the changes in stem mortality, recruitment and composition shifts. Experimental drought increased annual stem mortality rate at the community level for both H- and L-canopies. Natural drought amplified the effects of experimental drought on stem mortality at the community level and of Q. ilex for H- and L-canopies. The timescales of natural drought, however, varied substantially with canopy types and species, with shorter timescales in L- than H-canopy and for Q. ilex than P. latifolia. Furthermore, experimental drought combined with natural extremes amplified the increases in stem mortality and decreases in growth for L-canopy. Contrasting responses between Q. ilex and P. latifolia for the relative in abundance and growth were observed in L-canopy and drought treatment reinforced the vegetation shift favoring P. latifolia. These findings suggest continuous drought regimes accelerated a vegetation shift, implying potential consequences for the functions and services for water-limited forest ecosystems.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció MINECO/CGL2016-79835-P
Nota: Número d'acord de subvenció AGAUR/2014/SGR-274
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Water deficits ; Mediterranean forests ; Long-term experimental drought ; Frequent extreme droughts ; Stem-mortality rate ; Recruitment ; Vegetation shift
Publicat a: Environmental and experimental botany, Vol. 151 (July 2018) , p. 1-11, ISSN 0098-8472

DOI: 10.1016/j.envexpbot.2018.02.008


Disponible a partir de: 2020-07-30
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El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Articles de recerca
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 Registre creat el 2018-04-25, darrera modificació el 2018-05-01



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