Josep Maria Espelta

Dr. Josep Maria Espelta

CREAF (Centre for Ecological Research and Forestry Applications); Edifici Biociències. Campus Universitat Autònoma de Barcelona; Cerdanyola del Vallès 08193, Spain
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Research Focus & Metrics

Academic Career Length

35Years (1992-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 May 2009 in Ecology
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Journal Article
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SPS. Paula
S. Paula
Margarita ArianoutsouMargarita Arianoutsou
Margarita Arianoutsou
DKD. Kazanis
D. Kazanis
ÇTÇ Tavsanoglu
Ç Tavsanoglu
FLF. Lloret
F. Lloret
JPJ. G. Pausas
J. G. Pausas
Plant trait information is essential for understanding plant evolution, vegetation dynamics, and vegetation responses to disturbance and management. Furthermore, in Mediterranean ecosystems, changes in fire regime may be more relevant than direct changes in climatic conditions, making the knowledge of fire‐related traits especially important. Thus the purpose of this data set was to compile the most updated and comprehensive information on fire‐related traits for vascular plant species of the Mediterranean Basin, that is, traits related to plant persistence and regeneration after fire. Data were collected from an extensive literature review and from field and experimental observations. The data source is documented for each value. Since life history traits may vary spatially or with environmental conditions, we did not aggregate them by species; i.e., traits and species are repeated in different records if they were observed by different researchers and/or in different locations. Life history traits included in the data set are: life form, resprouting ability (after fire, after clipping, or after other disturbances that remove all the aboveground biomass), resprouting bud source, heat‐stimulated germination, other germination cues, seed bank location and longevity, post‐fire seedling emergence and survival, maturity age of resprouts and saplings, and seed mass. Several traits are unknown for many species; consequently, the data set reflects the state of the knowledge on the topic. However, since the ability to resprout is a trait of paramount relevance in fire‐prone environments, it was considered a core trait in the data set, and thus species whose resprouting capacity was unknown were not included. Life form is also provided for all taxa. The structure of the database allows different levels of information (and accuracy) for each entry, and thus some traits may include different types of data (quantitative, semi‐quantitative, or categorical) from different sources.The data set is structured in 8263 records and 11 columns, obtained from 301 published and unpublished sources of information. It includes 952 taxa determined at specific or infraspecific level, which comprise 859 species, 384 genera, and 79 families. Although this is the most comprehensive data set of fire‐relevant plant traits for Mediterranean species, there is still a considerable need for observations and experiments, especially in little‐studied Mediterranean areas, such as northern Africa. The complete data sets corresponding to abstracts published in the Data Papers section of the journal are published electronically in Ecological Archives at 〈http://esapubs.org/archive〉. (The accession number for each Data Paper is given directly beneath the title.)

1 January 2000 in The Botanical Review
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Miguel ZavalaMiguel Zavala
Miguel Zavala
Josep Maria EspeltaJosep Maria Espelta
Josep Maria Espelta
JRJavier Retana
Javier Retana

1 March 2008 in Ecology
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Journal Article
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Josep Maria EspeltaJosep Maria Espelta
Josep Maria Espelta
PCPilar Cortés
Pilar Cortés
Roberto Molowny-HorasRoberto Molowny-Horas
Roberto Molowny-Horas
BSBelén Sánchez-Humanes
Belén Sánchez-Humanes
JRJavier Retana
Javier Retana
Temporally variable production of seed crops by perennial plants (masting) has been hypothesized to be a valuable mechanism in the reduction of seed predation by satiating and starving seed consumers. To achieve these benefits, coexisting species subjected to the same predator would benefit from a similar pattern of seeding fluctuation over time that could lead to a reduction in predation at the within‐species level. We tested for the existence of an environmental factor enforcing synchrony in acorn production in two sympatric Mediterranean oaks (Quercus ilex and Q. humilis) and the consequences on within‐species and between‐species acorn predation, by monitoring 15 mixed forests (450 trees) over seven years. Acorn production in Q. ilex and Q. humilis was highly variable among years, with high population variability (CVp) values. The two species exhibited a very different pattern across years in their initial acorn crop size (sum of aborted, depredated, and sound acorns). Nevertheless, interannual differences in summer water stress modified the likelihood of abortion during acorn ripening and enforced within‐ and, particularly, between‐species synchrony and population variability in acorn production. The increase in CVp from initial to mature acorn crop (after summer) accounted for 33% in Q. ilex, 59% in Q. humilis, and 60% in the two species together. Mean yearly acorn pre‐dispersal predation by invertebrates was considerably higher in Q. humilis than in Q. ilex. Satiation and starvation of predators was recorded for the two oaks, and this effect was increased by the year‐to‐year variability in the size of the acorn crop of the two species combined. Moreover, at a longer time scale (over seven years), we observed a significant reduction in the mean proportion of acorns depredated for each oak and the variability in both species' acorn production combined. Therefore, our results demonstrate that similar patterns of seeding fluctuation over time in coexisting species mediated by an environmental cue (summer drought) may contribute to the reduction of the impact of seed predation at a within‐species level. Future research should be aimed at addressing whether this process could be a factor assisting in the coexistence of Q. ilex and Q. humilis.

1 January 2002 in Écoscience
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Journal Article
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JRJavier Retana
Javier Retana
Josep Maria EspeltaJosep Maria Espelta
Josep Maria Espelta
AHAbdessamad Habrouk
Abdessamad Habrouk
JOJose Luis Ordoñez
Jose Luis Ordoñez
FSFaustina de Solà-Morales
Faustina de Solà-Morales
Fire has favored pines throughout their natural range in environments subject to continuous disturbances, such as the Mediterranean Basin. However, recovery of pine species after large fires is not always successful. In this study, we analyze the post-fire regeneration pattern of Pinus halepensis, P. nigra and P. sylvestris three years after fire, in an area affected by a large wildfire in 1994. Moreover, we develop a model of succession to predict medium-term changes in forest composition 30 years after fire from the regeneration monitored during the first years after fire. The results show that, although the three pine species regenerate quite well in the absence of fire, their post-fire regeneration is very different: P. halepensis shows high seedling density after fire, but P. nigra and P. sylvestris almost disappear from burned plots. The model simulations of the future forest composition 30 years after fire indicate that 77-93% of plots dominated by these two pines change after fire to communities dominated by oaks (Quercus ilex, Q. cerrioides). There is also a considerable number (7-16%) of these burned pine plots that change to shrublands. Thus, these observational and modelling results suggest that large fire events, which have increased considerably in the Mediterranean region in the last decades, may decrease the overall distribution of these pine species, especially that of P.nigra and P. sylvestris.

1 November 1999 in Plant Ecology
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AHAbdessamad Habrouk
Abdessamad Habrouk
JRJavier Retana
Javier Retana
Josep Maria EspeltaJosep Maria Espelta
Josep Maria Espelta

9 April 2013 in Global Change Biology
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SRSonia G. Rabasa
Sonia G. Rabasa
EGElena Granda
Elena Granda
RBRaquel Benavides
Raquel Benavides
GKGeorges Kunstler
Georges Kunstler
Josep Maria EspeltaJosep Maria Espelta
Josep Maria Espelta
FVFernando Valladares
Fernando Valladares