Javier Retana, Josep María Espelta, Marc Gracia, Miquel Riba,
... such as drought or light limitation (Pons 1992; Espelta et al. 1995), and availability of suitable microsites ...
Tópico(s): Botany, Ecology, and Taxonomy Studies
1999 - Springer Nature | Ecological studies
Cristina García, Josep María Espelta, Arndt Hampe,
... and long-established broadleaf forests in NE Spain, Espelta et al. (2020) show that secondary forests tend ...
Tópico(s): Forest Ecology and Biodiversity Studies
2020 - Wiley | Journal of Applied Ecology
... 12-409548-9.10429-4Juliana Vélez, Josep Maria Espelta, Orlando Rivera, Dolors Armenteras Effects of seasonality and ...
Tópico(s): Forest Insect Ecology and Management
1977 - University of Chicago Press | The American Naturalist
Susana Paula, Μαργαρίτα Αριανούτσου, Dimitris Kazanis, Çağatay Tavşanoğlu, Francisco Lloret, Constanze Buhk, Fernando Ojeda, Belén Luna, José M. Moreno, Anselm Rodrigo, Josep María Espelta, Sara Palacio, Belén Fernández Santos, Paulo M. Fernandes, Juli 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 ...
Tópico(s): Plant Parasitism and Resistance
2009 - Wiley | Ecology
Josep María Espelta, Raúl Bonal, Belén Sánchez‐Humanes,
Summary 1. Pre‐dispersal seed predation (PSP) often occurs in multi‐host–predator systems (e.g. several plant species exposed to a common array of granivorous insects). However, whether the interaction among seed phenology, seed size and predator size accounts for interspecific differences in PSP remains elusive. 2. We studied PSP in a mixed‐oak forest with two oaks (the larger‐seeded Quercus humilis and the smaller‐seeded Q. ilex ), both depredated by two acorn weevils (the smaller Curculio glandium and ...
Tópico(s): Plant and animal studies
2009 - Wiley | Journal of Ecology
David Tarrasón, Josué T. Urrutia, Federica Ravera, Ertilia Herrera, Pilar Andrés, Josep María Espelta,
Tópico(s): Ecology and Vegetation Dynamics Studies
2009 - Springer Science+Business Media | Biodiversity and Conservation
Josep María Espelta, Pilar Cortés, Roberto Molowny‐Horas, Javier Retana,
Tópico(s): Forest Insect Ecology and Management
2009 - Springer Science+Business Media | Oecologia
Miriam Cotillas, Santiago Sabaté, Carlos Gracia, Josep María Espelta,
Climate change is one of the major challenges for ecosystem conservation. One of the most vulnerable areas to climate change is the Mediterranean Basin which is expected to suffer important changes in temperature and precipitation in the next few decades, leading to a warmer and dryer climate. Therefore, it is necessary to determine species-specific responses to increased drought to predict possible future changes in the structure and composition of Mediterranean forests, as well as to identify ...
Tópico(s): Forest ecology and management
2009 - Elsevier BV | Forest Ecology and Management
Hendrik Poorter, Hans Lambers,
... org/10.1086/339459M. A. Zavala, J. M. Espelta, Javier Retana Constraints and trade-offs in Mediterranean ...
Tópico(s): Forest ecology and management
1991 - University of Chicago Press | The American Naturalist
Javier Retana, Miquel Riba, Carles Castell, Josep María Espelta,
Tópico(s): Forest Management and Policy
1992 - Springer Science+Business Media | Vegetatio
Josep María Espelta, Javier Retana, Abdessamad Habrouk,
The extension of mixed evergreen (Quercus ilex) and winter deciduous (Quercus cerrioides) oak coppices is increasing in NE Spain as a consequence of large wildfires. The best alternative to manage these high-density and low production forests is their conversion into stored coppices (i.e. coppices with few stems per stool). However, in this process, functional differences arising from the contrasted leaf-habit of the two co-occurring oaks should be taken into account. In this study, we explore the ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2002 - Elsevier BV | Forest Ecology and Management
Javier Retana, Josep María Espelta, Abdessamad Habrouk, José Luis Ordóñez, Faustina de Solà-Morales,
AbstractFire 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 ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2002 - Taylor & Francis | Ecoscience
Josep María Espelta, Javier Retana, Abdessamad Habrouk,
Tópico(s): Ecology and Vegetation Dynamics Studies
2003 - Elsevier BV | Forest Ecology and Management
Josep María Espelta, Iraima Verkaik, Màrcia Eugenio Gozalbo, Francisco Lloret,
Increasing fire recurrence is a major problem threatening Mediterranean-type ecosystems. Moreover, this pattern is predicted to increase owing to global change. Although a reduction in the density and growth of post-fire regeneration is usually observed in recurrently burnt areas, the potential effects on reproductive ability have seldom been explored. The aim of the present study is to investigate whether structural changes induced by fire recurrence may constrain reproduction ability of Pinus ...
Tópico(s): Forest ecology and management
2008 - CSIRO Publishing | International Journal of Wildland Fire
Daniel Moya, Josep María Espelta, Francisco Ramón López Serrano, Màrcia Eugenio Gozalbo, Jorge de las Heras,
In 1994, six large fires occurred along a climate gradient in Eastern Spain. Ten-year-old trees were selected in the plots established for each location affected by fire. Each selected tree was measured for height and trunk diameter, the number of female strobili and cones, and grouped into four types. A geographical gradient was determined to study growth by latitude and variations in reproductive characteristics. Height and diameter values decreased southwards with the exception of the lowest- ...
Tópico(s): Forest ecology and management
2008 - CSIRO Publishing | International Journal of Wildland Fire
Josep María Espelta, Pilar Cortés, Roberto Molowny‐Horas, Belén Sánchez‐Humanes, 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 ...
Tópico(s): Botany and Plant Ecology Studies
2008 - Wiley | Ecology
Belén Sánchez‐Humanes, Victoria L. Sork, Josep María Espelta,
The concept of trade-offs between reproduction and other fitness traits is a fundamental principle of life history theory. For many plant species, the cost of sexual reproduction affects vegetative growth in years of high seed production through the allocation of resources to reproduction at different hierarchical levels of canopy organization. We have examined these tradeoffs at the shoot and branch level in an endemic California oak, Quercus lobata, during a mast year. To determine whether acorn ...
Tópico(s): Plant and animal studies
2010 - Springer Science+Business Media | Oecologia
Raúl Bonal, Alberto Muñóz, Josep María Espelta,
1. The timing of reproduction is predicted to match the period of maximum food availability. In this sense, the case of many phytophagous insects in temperate regions is very illustrative, as their larvae usually depend on a resource only available for a limited period of time each year. 2. For 3 years the interactions between the weevil Curculio elephas and the Mediterranean Holm oak Quercus ilex were studied. Weevil larvae grow within the acorns, feeding on the cotyledons. The timing of oviposition ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2010 - Wiley | Ecological Entomology
Lídia Quevedo, Anselm Rodrigo, Josep María Espelta,
Post-fire resprouting ability of the non-dominant tree and shrub species of the Mediterranean Basin has not yet been experimentally tested, although this group contributes to maintain the richness of Mediterranean plant communities. In this study, we have analyzed the post-fire recovery ability of 15 woody species that occur in relatively low abundance in dry and sub humid Mediterranean areas in NE of Spain. The main goals have been: (i) to determine experimentally the post-fire resprouting ability ...
Tópico(s): Mediterranean and Iberian flora and fauna
2007 - Springer Science+Business Media | Annals of Forest Science
Daniel Moya, Josep María Espelta, Iraima Verkaik, Francisco Ramón López Serrano, Jorge de las Heras,
In Spain, many Pinus halepensis Mill. forests have been seriously affected by significant forest fires in the past decade, in 1994 alone, more than 100 000 ha were burned in Eastern Spain. In order to study the reproductive characteristics of P. halepensis after forest fires, six locations were selected in four areas affected by serious fires in the summer of 1994, and the following different precipitation zones were studied: dry-subhumid, dry and semi-arid. Ten years after the fires, data relevant ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2007 - Springer Science+Business Media | Annals of Forest Science
Guille Peguero, Josep María Espelta,
Abstract: Many plant species in tropical dry forests partly base their ability to persist after disturbance on resprouting. Yet little is known if this ability can be affected by the intensity and seasonality of disturbance and whether the amount of resources (starch, N, P) stored in the taproot may constrain this response. We investigated resprouting after experimental clipping or burning, applied before or after the dry season and repeatedly in Acacia pennatula individuals in wooded rangelands ...
Tópico(s): Fire effects on ecosystems
2011 - Cambridge University Press | Journal of Tropical Ecology
Guille Peguero, Oscar R. Lanuza, Robert Savé, Josep María Espelta,
Tópico(s): Plant Parasitism and Resistance
2011 - Springer Science+Business Media | Plant Ecology
O. Ortiz, G. Ojeda, Josep María Espelta, Josep M. Alcañiz,
Tópico(s): Ecology and Vegetation Dynamics Studies
2011 - Springer Science+Business Media | New Forests
Raúl Bonal, Josep María Espelta, Alfried P. Vogler,
Tópico(s): Genetic diversity and population structure
2011 - Springer Science+Business Media | Oecologia
Josep María Espelta, Xavier Arnán, Anselm Rodrigo,
The advantages of canopy seed retention (serotiny) for plants inhabiting fire‐prone ecosystems are well documented. However, very few species are completely serotinous and non‐fire induced opening of serotinous fruits is commonly observed (weak serotiny). Two non‐mutually exclusive causes are envisaged to contribute to this process: mechanical changes in serotinous fruits mediated by climatic conditions (e.g. drought) or the costs of maintenance for the plant of these long‐lasting structures. However, ...
Tópico(s): Plant Parasitism and Resistance
2011 - Wiley | Oikos
Raúl Bonal, Marisa Hernández, Joaquín Ortego, Alberto Muñóz, Josep María Espelta,
Abstract. 1. Today, forest fragmentation is one of the major threats to biodiversity worldwide. In this context, fragmented populations of specialised forest organisms face an increasing risk of extinction because of factors such as local food scarcity. Nonetheless, the role of food availability may differ depending on organism size, which is expected to determine the energy requirements and mobility between fragments. 2. A field study was carried out on Curculio elephas , a forest beetle with low ...
Tópico(s): Forest Ecology and Biodiversity Studies
2011 - Wiley | Insect Conservation and Diversity
Belén Sánchez‐Humanes, Josep María Espelta,
In order to explore the effects of climate change on Mediterranean regenerating forests, we experimentally assessed the effects of increased drought on the reproductive attributes of Quercus ilex over a 4-year period (2005–2008). We also investigated whether traditional thinning (selection of one to a few stems per stump) could mitigate the consequences of increased drought in oak coppices. Increased drought reduced the number of reproductive trees, mean number of female flowers produced and acorn ...
Tópico(s): Botany and Plant Ecology Studies
2011 - Oxford University Press | Forestry An International Journal of Forest Research
Jorge de las Heras, Daniel Moya, José A. Vega, Evangelia N. Daskalakou, V. Ramón Vallejo, Nikolaos Grigoriadis, Thekla Tsitsoni, Jaime Baeza, Alejandro Valdecantos, Cristina Fernández, Josep María Espelta, Paulo M. Fernandes,
The current chapter describes the ecological context and post-fire management practices for the most important and fire-prone coniferous tree species in the Mediterranean Basin, the serotinous pine trees. The state of art about evolution, habitat and adaptive strategies of Pinus halepensis Mill, Pinus brutia Ten. and Pinus pinaster Aiton are included. The management of burned areas, from emergency to long-term actions, are included but also the influence of climate change and the changing fire dynamics ...
Tópico(s): Forest Insect Ecology and Management
2011 - Springer Nature (Netherlands) | Managing forest ecosystems
Miguel Á. Zavala, Josep María Espelta, John P. Caspersen, Javier Retana,
The relative abundance of two codominant Mediterranean tree species, shade-tolerant Quercus ilex L. and shade-intolerant Pinus halepensis Mill., is inversely correlated along aridity gradients, but this pattern is not explained by seedling responses to water or light availability, suggesting that subsequent life history stages may explain forest composition. To test this hypothesis, we calibrated statistical models of sapling growth and height–diameter allometry as functions of light availability ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2011 - NRC Research Press | Canadian Journal of Forest Research
Iraima Verkaik, Josep María Espelta,
Many pines growing in fire-prone ecosystems exhibit an abundant production of cones and the retention of part of these cones as an aerial seed bank in the canopy (serotiny). The protection of seeds and their prolific release after fire facilitate the re-colonization of the burned area. However, over-stocking in this fire regenerated stands may constraint tree growth, as well as increase the risk of new wildfires. Therefore, thinning is strongly recommended both to reduce fire occurrence and to reduce ...
Tópico(s): Forest ecology and management
2006 - Elsevier BV | Forest Ecology and Management