skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Compound fire-drought regimes promote ecosystem transitions in Mediterranean ecosystems

Journal Article · · Journal of Ecology
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5];  [6]
  1. CREAF Cerdanyola del Vallès, Barcelona (Spain)
  2. CREAF Cerdanyola del Vallès, Barcelona (Spain); CTFC, Solsona (Spain)
  3. CREAF Cerdanyola del Vallès, Barcelona (Spain); InForest Joint Research Unit (CTFC‐CREAF), Solsona (Spain); CSIC, Cerdanyola del Vallès (Spain)
  4. Univ. of California, Berkeley, CA (United States). Dept. of Integrative Biology. Jepson Herbarium. Dept. of Environmental Science, Policy, and Management
  5. Univ. of California, Santa Barbara, CA (United States). Univ. of California Cooperative Extension. Bren School of Environmental Science & Management
  6. CREAF Cerdanyola del Vallès, Barcelona (Spain); Autonomous Univ. of Barcelona (Spain)

Understanding ecosystem responses to compound disturbance regimes and the influence of specific sequences of events in determining ecosystem shifts remains a challenge. We use a modelling framework for Mediterranean-type ecosystems to assess the effects of fire–drought interactions on long-term vegetation dynamics and to identify disturbance-driven changes in trait composition (tree seeder vs. tree resprouter prevalence) and ecosystem state (forest vs. non-forest). Changes in tree seeder and the tree resprouter dominance show nonlinear, threshold-type trends over gradients of increasing compound disturbance frequency. Vegetation composition thresholds mostly occur in a narrow range of the compound fire–drought disturbance space. Additionally, trait compositional switches and the likelihood of sudden changes in ecosystem state are promoted by fire-drought interactions. Distinct sequences of disturbance events cause vegetation transitions, disrupting ecosystem resilience, even under moderate recurrence of individual disturbances. An extreme drought year followed by one or two large fire events promotes shifts from resprouter- to seeder dominance. Contrastingly, a large crown fire followed by an extreme drought promotes changes from seeder to resprouter dominance. This disturbance sequence is also a mechanism strong enough to trigger sudden shifts in ecosystem state (from forest to non-forest). Synthesis. Thresholds of change in vegetation composition occur over a narrow range of the modelled gradients of compound fire-drought recurrence, and the loss of ecosystem resilience is contingent on particular sequences of disturbance events. Overall, our findings highlight that disturbance interactions define the relative location of tipping points in ecosystem state, and that effects and feedbacks of compound disturbance regimes increase the long-term likelihood of sudden ecosystem shifts and, therefore, uncertainty in predicting vegetation state.

Research Organization:
Univ. of California, Berkeley, CA (United States); CREAF Cerdanyola del Vallès, Barcelona (Spain)
Sponsoring Organization:
USDOE; European Commission (EC)
Grant/Contract Number:
AC02-05CH11231; CGL2017-87176-P; PIIF-GA-2013-625547; RYC-2012-11109; CGL2014-59742-C2-2-R; CGL2015-67419-R
OSTI ID:
1510772
Journal Information:
Journal of Ecology, Vol. 107, Issue 3; ISSN 0022-0477
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

References (78)

Disturbance interactions: characterization, prediction, and the potential for cascading effects journal April 2015
State-and-transition simulation models: a framework for forecasting landscape change journal July 2016
Analysis of large fires in European Mediterranean landscapes: Lessons learned and perspectives journal April 2013
Burn me twice, shame on who? Interactions between successive forest fires across a temperate mountain region journal September 2016
Hemiboreal forest: natural disturbances and the importance of ecosystem legacies to management journal February 2017
Old-field secondary succession in SE Spain: can fire divert it? journal June 2010
Landscape-scale density-dependent recruitment of oaks in planted forests: More is not always better journal August 2013
An ecological perspective on extreme climatic events: a synthetic definition and framework to guide future research: Defining extreme climate events journal April 2011
Cumulative effects of fire and drought in Mediterranean ecosystems journal August 2017
Effects of biological legacies and herbivory on fuels and flammability traits: A long-term experimental study of alternative stable states journal May 2017
Influences of fire-vegetation feedbacks and post-fire recovery rates on forest landscape vulnerability to altered fire regimes journal March 2018
How frequent storms affect wetland vegetation: a preview of climate-change impacts journal December 2010
Temperature as a potent driver of regional forest drought stress and tree mortality journal September 2012
Interactive and cumulative effects of multiple human stressors in marine systems journal December 2008
Effects of fire frequency on species composition in a Mediterranean shrubland journal December 2008
Caught in a fire trap: Recurring fire creates stable size equilibria in woody resprouters journal September 2012
Global patterns in the sensitivity of burned area to fire-weather: Implications for climate change journal December 2015
Towards understanding resprouting at the global scale journal October 2015
Fire persistence traits of plants along a productivity and disturbance gradient in mediterranean shrublands of south-east Australia journal May 2007
Short-interval wildfires increase likelihood of resprouting failure in fire-tolerant trees journal February 2019
Catastrophic shifts in ecosystems journal October 2001
Impacts of biological invasions on disturbance regimes journal May 1998
Sequential Disturbance Effects of Hailstorm and Fire on Vegetation in a Mediterranean-Type Ecosystem journal May 2015
High post-fire mortality of resprouting woody plants in Tasmanian Mediterranean-type vegetation journal January 2017
A review of the development of Mediterranean pine–oak ecosystems after land abandonment and afforestation: are they novel ecosystems? journal February 2012
Disturbance and landscape dynamics in a changing world journal October 2010
Direct Regeneration is not the only Response of Mediterranean Forests to Large Fires journal March 2004
Large-scale recruitment limitation in Mediterranean pines: the role of Quercus ilex and forest successional advance as key regional drivers : Large-scale pine recruitment limitation journal September 2013
Mortality of resprouting chaparral shrubs after a fire and during a record drought: physiological mechanisms and demographic consequences journal December 2013
Changing disturbance regimes, ecological memory, and forest resilience journal September 2016
Drought-induced vegetation shifts in terrestrial ecosystems: The key role of regeneration dynamics journal September 2016
Impact of a high-intensity fire on mixed evergreen and mixed conifer forests in the Peninsular Ranges of southern California, USA journal November 2006
Tree cover in sub-Saharan Africa: Rainfall and fire constrain forest and savanna as alternative stable states journal May 2011
Reconceptualizing synergism and antagonism among multiple stressors journal March 2015
The impacts of increasing drought on forest dynamics, structure, and biodiversity in the United States journal February 2016
Optimal intensity and age of management in young Aleppo pine stands for post-fire resilience journal May 2008
Disturbance interactions can impact resilience mechanisms of forests journal May 2011
Vegetation patterns induced by random climate fluctuations journal January 2006
Disturbance maintains alternative biome states journal October 2015
Sequence effects of disturbance on community structure journal February 2001
Simulating the Effects of Frequent fire on Southern California Coastal Shrublands journal October 2006
Physiological differences explain the co-existence of different regeneration strategies in Mediterranean ecosystems journal November 2013
Spatial and temporal patterns of plant functional types under simulated fire regimes journal January 2007
Simulating vegetation shifts in north-eastern Mediterranean mountain forests under climatic change scenarios journal January 2009
Interactive effects of grazing, drought, and fire on grassland plant communities in North America and South Africa journal January 2014
A new generation of climate-change experiments: events, not trends journal September 2007
Vegetation Responses to Extreme Hydrological Events: Sequence Matters journal January 2009
Forest health and global change journal August 2015
Assessing the resilience of Mediterranean holm oaks to disturbances using selective thinning journal November 2009
Wildfire Selectivity for Land Cover Type: Does Size Matter? journal January 2014
A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests journal February 2010
Interval squeeze: altered fire regimes and demographic responses interact to threaten woody species persistence as climate changes journal June 2015
Global convergence in the vulnerability of forests to drought journal November 2012
Stochastic trajectories of succession initiated by extreme climatic events: Stochastic succession caused by drought journal May 2011
Resilience and Stability of Ecological Systems journal November 1973
Forest resilience and tipping points at different spatio-temporal scales: approaches and challenges journal January 2015
Tree mortality across biomes is promoted by drought intensity, lower wood density and higher specific leaf area journal February 2017
Climatic controls on ecosystem resilience: Postfire regeneration in the Cape Floristic Region of South Africa journal July 2015
Detecting trend and seasonal changes in satellite image time series journal January 2010
A minimal model of fire-vegetation feedbacks and disturbance stochasticity generates alternative stable states in grassland–shrubland–woodland systems journal March 2015
On underestimation of global vulnerability to tree mortality and forest die-off from hotter drought in the Anthropocene journal August 2015
Compounded Perturbations Yield Ecological Surprises journal November 1998
Post-fire Mediterranean vegetation dynamics and diversity: A discussion of succession models journal March 2008
A new look at water transport regulation in plants journal July 2014
Resistance and resilience to changing climate and fire regime depend on plant functional traits journal September 2014
Potential shift in tree species composition after interaction of fire and drought in the Central Alps journal February 2010
Fire-induced shifts in overstory tree species composition and associated understory plant composition in Glacier National Park, Montana journal January 2012
Constraints on global fire activity vary across a resource gradient journal January 2011
Compounded disturbances in sub-alpine forests in western Colorado favour future dominance by quaking aspen ( Populus tremuloides ) journal July 2012
Extreme climatic events and vegetation: the role of stabilizing processes journal November 2011
zoo : S3 Infrastructure for Regular and Irregular Time Series journal January 2005
Testing the Shifting Persistence Niche Concept: Plant Resprouting along Gradients of Disturbance journal June 2015
Fire-induced deforestation in drought-prone Mediterranean forests: drivers and unknowns from leaves to communities journal January 2018
Constraints and trade-offs in Mediterranean plant communities: The case of holm oak-Aleppo pine forests journal January 2000
Tree cover in sub-Saharan Africa: Rainfall and fire constrain forest and savanna as alternative stable states journal May 2011
A new generation of climate-change experiments: events, not trends
  • Jentsch, Anke; Kreyling, Jürgen; Beierkuhnlein, Carl
  • Frontiers in Ecology and the Environment, Vol. preprint, Issue 2007 https://doi.org/10.1890/060097
journal January 2007
Temperature as a potent driver of regional forest drought stress and tree mortality text January 2012
zoo: S3 Infrastructure for Regular and Irregular Time Series text January 2005

Cited By (5)

Evaluating uncertainty in Landsat-derived postfire recovery metrics due to terrain, soil, and shrub type variations in southern California journal December 2019
Climatic and fire determinants of early life-history stages in the Mediterranean shrub Cistus albidus journal November 2019
Climate change likely to reshape vegetation in North America's largest protected areas journal May 2019
Increased aridity drives post‐fire recovery of Mediterranean forests towards open shrublands journal November 2019
Increased aridity drives post‐fire recovery of Mediterranean forests towards open shrublands text January 2020