Cumulative effects of fire and drought in Mediterranean ecosystems. Issue 8 (18th August 2017)
- Record Type:
- Journal Article
- Title:
- Cumulative effects of fire and drought in Mediterranean ecosystems. Issue 8 (18th August 2017)
- Main Title:
- Cumulative effects of fire and drought in Mediterranean ecosystems
- Authors:
- Batllori, Enric
De Cáceres, Miquel
Brotons, Lluís
Ackerly, David D.
Moritz, Max A.
Lloret, Francisco - Abstract:
- 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 droughtAbstract: 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. … (more)
- Is Part Of:
- Ecosphere. Volume 8:Issue 8(2017)
- Journal:
- Ecosphere
- Issue:
- Volume 8:Issue 8(2017)
- Issue Display:
- Volume 8, Issue 8 (2017)
- Year:
- 2017
- Volume:
- 8
- Issue:
- 8
- Issue Sort Value:
- 2017-0008-0008-0000
- Page Start:
- n/a
- Page End:
- n/a
- Publication Date:
- 2017-08-18
- Subjects:
- additive model -- climatic change -- compound disturbance regimes -- cumulative effects -- drought -- ecosystem resilience -- fire -- Mediterranean ecosystems -- regeneration traits -- sequence of events
Ecology -- Periodicals
Ecology
Periodicals
577.05 - Journal URLs:
- http://bibpurl.oclc.org/web/50453 ↗
http://esajournals.onlinelibrary.wiley.com/hub/journal/10.1002/(ISSN)2150-8925/ ↗
http://www.esajournals.org/loi/ecsp ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1002/ecs2.1906 ↗
- Languages:
- English
- ISSNs:
- 2150-8925
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 4679.xml