Present and future of ecological and evolutionary research in mediterranean-type ecosystems: Conclusions from the last international mediterranean ecosystems conference

Arista, M., Arroyo, J., Berjano, R., Jiménez-Lobato, V., Jiménez-López, J., López-Jurado, J., Olmedo-Vicente, E., Rodríguez-Castaneda, N.L., Sánchez, M., Simón-Porcar, V.I., Vilà, M., Xavier Picó, F., Lloret, F., Lloret, F., Márquez-Corro, J.I. (2017) Present and future of ecological and evolutionary research in mediterranean-type ecosystems: Conclusions from the last international mediterranean ecosystems conference. American Journal of Botany. 104: 1777-1782.
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Doi: 10.3732/ajb.1700367

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Cumulative effects of fire and drought in Mediterranean ecosystems

Batllori E., Dećaceres M., Brotons L., Ackerly D.D., Moritz M.A., Lloret F. (2017) Cumulative effects of fire and drought in Mediterranean ecosystems. Ecosphere. 8: 0-0.
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Doi: 10.1002/ecs2.1906

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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 Mediterraneantype 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 longterm 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. © 2017 Batllori et al.

Llegeix més

Environmental stress effects on reproduction and sexual dimorphism in the gynodioecious species Silene acaulis

Canelles, Q., Saura-Mas, S., Brotons, L., García, M.B., Lloret, F., Villellas, J., Morris, W.F. (2017) Environmental stress effects on reproduction and sexual dimorphism in the gynodioecious species Silene acaulis. Environmental and Experimental Botany. : 0-0.
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Doi: 10.1016/j.envexpbot.2017.06.010

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The importance of functional diversity in the stability of Mediterranean shrubland communities after the impact of extreme climatic events

De La Riva, E.G., Lloret, F., Pérez-Ramos, I.M., Marañón, T., Saura-Mas, S., Díaz-Delgado, R., Villar, R. (2017) The importance of functional diversity in the stability of Mediterranean shrubland communities after the impact of extreme climatic events. Journal of Plant Ecology. 10: 281-293.
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Doi: 10.1093/jpe/rtw027

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A review of the combination among global change factors in forests, shrublands and pastures of the Mediterranean Region: Beyond drought effects

Doblas-Miranda, E., Alonso, R., Arnan, X., Bermejo, V., Brotons, L., de las Heras, J., Estiarte, M., Hódar, J.A., Llorens, P., Lloret, F., López-Serrano, F.R., Martínez-Vilalta, J., Moya, D., Peñuelas, J., Pino, J., Rodrigo, A., Roura-Pascual, N., Valladares, F., Vilà, M., Zamora, R., Retana, J. (2017) A review of the combination among global change factors in forests, shrublands and pastures of the Mediterranean Region: Beyond drought effects. Global and Planetary Change. 148: 42-54.
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Doi: 10.1016/j.gloplacha.2016.11.012

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Tree mortality across biomes is promoted by drought intensity, lower wood density and higher specific leaf area

Greenwood, S., Ruiz-Benito, P., Martínez-Vilalta, J., Lloret, F., Kitzberger, T., Allen, C.D., Fensham, R., Laughlin, D.C., Kattge, J., Bönisch, G., Kraft, N.J.B., Jump, A.S. (2017) Tree mortality across biomes is promoted by drought intensity, lower wood density and higher specific leaf area. Ecology Letters. 20: 539-553.
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Doi: 10.1111/ele.12748

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Structural overshoot of tree growth with climate variability and the global spectrum of drought-induced forest dieback

Jump, A.S., Ruiz-Benito, P., Greenwood, S., Allen, C.D., Kitzberger, T., Fensham, R., Martínez-Vilalta, J., Lloret, F. (2017) Structural overshoot of tree growth with climate variability and the global spectrum of drought-induced forest dieback. Global Change Biology. : 0-0.
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Doi: 10.1111/gcb.13636

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Changes in the natural dynamics of Nothofagus dombeyi forests: Population modeling with increasing drought frequencies

Molowny-Horas, R., Suarez, M.L., Lloret, F. (2017) Changes in the natural dynamics of Nothofagus dombeyi forests: Population modeling with increasing drought frequencies. Ecosphere. 8: 0-0.
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Doi: 10.1002/ecs2.1708

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Climate variability and community stability in Mediterranean shrublands: The role of functional diversity and soil environment

Pérez-Ramos, I.M., Díaz-Delgado, R., de la Riva, E.G., Villar, R., Lloret, F., Marañón, T. (2017) Climate variability and community stability in Mediterranean shrublands: The role of functional diversity and soil environment. Journal of Ecology. : 0-0.
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Doi: 10.1111/1365-2745.12747

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Climate- and successional-related changes in functional composition of European forests are strongly driven by tree mortality

Ruiz-Benito, P., Ratcliffe, S., Zavala, M.A., Martínez-Vilalta, J., Vilà-Cabrera, A., Lloret, F., Madrigal-González, J., Wirth, C., Greenwood, S., Kändler, G., Lehtonen, A., Kattge, J., Dahlgren, J., Jump, A.S. (2017) Climate- and successional-related changes in functional composition of European forests are strongly driven by tree mortality. Global Change Biology. : 0-0.
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Doi: 10.1111/gcb.13728

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