Web of Science: 7 citations, Scopus: 7 citations, Google Scholar: citations,
Cumulative effects of fire and drought in Mediterranean ecosystems
Batllori, Enric (Centre de Recerca Ecològica i Aplicacions Forestals)
Càceres, Miquel de (Centre de Recerca Ecològica i Aplicacions Forestals)
Brotons Alabau, Lluís (Centre de Recerca Ecològica i Aplicacions Forestals)
Ackerly, David D. (University of California (Berkeley). Department of Integrative Biology)
Moritz, Max A. (University of California (Berkeley). Department of Environmental Science, Policy, and Management,)
Lloret Maya, Francisco (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Date: 2017
Abstract: The occurrence of multiple disturbances can jointly affect the recovery capacity of ecosystems, potentially leading to changes in vegetation dynamics or loss of resilience. The effects of interacting disturbances on ecosystems are, however, not well understood. We use a model system based on Mediterranean-type ecosystems (MTEs) to examine how the interplay between vegetation regeneration traits and compound, stochastic disturbances modulate ecosystem dynamics. We developed a state-and-transition simulation model including two tree species with contrasting regeneration strategies (seeder vs. resprouter) and a shrubland formation. We aim to assess potential compositional switches under contrasted scenarios of compound fire–drought regimes, and to characterize the cumulative effects of fire–drought (synergism vs. antagonism) relative to the effects of individual disturbance regimes. Our simulation results indicate that interaction between moderate fire and sporadic drought recurrence—as opposed to chronic dryness—can act as a strong mechanism generating highly heterogeneous landscapes in which different regeneration types coexist, as observed in MTEs. Resprouters dominated under individual, moderate disturbance regimes of fire or drought, whereas the interaction of the two disturbances promoted the long-term coexistence of both tree regeneration strategies. However, shrubland expansion and persistence at the expanse of forests was favored by increases in drought recurrence and associated fire–drought interactions, highlighting the potential for important vegetation changes in MTEs under climate change. Overall, the cumulative effects of fire and drought can lead to distinct landscape configurations under moderate disturbance regimes that are otherwise only attained under high frequency of individual disturbances. At the ecosystem level, however, we suggest that disturbance-induced vegetation dynamics can modify vegetation sensitivity and resilience to further disturbances precluding the prevalence of synergistic effects of the two disturbances.
Note: Número d'acord de subvenció H2020/662155
Note: Número d'acord de subvenció FP7/625547
Note: Número d'acord de subvenció FP7/612645
Note: Número d'acord de subvenció AGAUR/2014/SGR-453
Note: Altres ajuts: Enric Batllori thanks the support of a Marie Curie International Incoming Fellowship (PIFF-GA-2013-625547) and Miquel De Caceres the support of a Spanish Ramon y Cajal Fellowship. Lluís Brotons and Francisco Lloret thank the support of the projects FORESTCAST, NEWFORESTS,INFORMED, SECADIN, and BIOCLIM.
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Additive model ; Climatic change ; Compound disturbance regimes ; Cumulative effects ; Drought ; Ecosystem resilience ; Fire ; Mediterranean ecosystems ; Regeneration traits ; Sequence of events
Published in: Ecosphere, Vol. 8, issue 8 (Aug. 2017) , e01906, ISSN 2150-8925

DOI: 10.1002/ecs2.1906

17 p, 2.7 MB

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)
Articles > Research articles
Articles > Published articles

 Record created 2018-01-09, last modified 2019-04-08

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