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Options Méditerranéennes : Série A. Séminaires Méditerranéens; n. 92
Endemic species of Narcissus in Central Spain: Biodiversity and conservation under grazing pressure by wild and domestic herbivorous"The genus Narcissus (Amaryllidaceae) has its diversity center in the Iberian Peninsula, where 90% of species are present. Generally, their populations are small. They grow in microhabitat quickly modifiable to changes in their environmental, biotic or human factors, mainly due to changes in land uses, to abandonment of grazing and in traditional land management. We have evaluated the effect of grazing on the type of habitat and population size from 25 species of this genus from Castilla-La Mancha Community, yielding some patterns in the development of these species. The variables used in this analysis allow us to evaluate inter- and intraspecific status of the genus, also confirming the role of these species as bioindicators of biodiversity "
The Iberian Peninsula is a major European region of biodiversity, as it harbours more than 30% of European endemic species. Despite a number of studies having evaluated the ability of nature reserves to protect certain taxa, there is still a lack of knowledge on how Iberian endemic fauna are represented in these reserves. We detected biodiversity hotspots of Iberian endemicity and evaluated the effectiveness of the Natura 2000 network (N2000) in representing 249 endemic species from eight animal taxonomic groups (amphibians, mammals, freshwater fishes, reptiles, water beetles, butterflies, lacewings and dung beetles). We found that only the 10% of these Iberian endemic species are considered species of community interest (i.e. species included in the Annexes of the Habitats Directive). We conducted gap analyses and null models of representativeness in N2000. Generally, N2000 is effective in its representation of Iberian endemic fauna, although we detected species and few hotspots of endemism that were still not represented. It is necessary to declare a few new protected areas, thus enhancing N2000's effectiveness in the conservation of the Iberian endemic fauna. Although the aim of N2000 is to protect species listed in the Birds and Habitats Directives, the conservation status of endemic species from one of the most important areas of Europe in terms of biodiversity , could be also a concern for the European Union. Our results are useful in the context of the recent European Commission mandate calling for a 'fitness check' of the Birds and Habitats Directives. This approach could be also applicable to other regions with high value of endemicity.
2016 •
2021 •
The authors would like to acknowledge Universitat d’Alacant for the possibility of conducting this work by means of a grant included in the program “Becas y Contratos para la formacion de Doctores del Vicerrectorado de Investigacion, FPU2010” and specific funding for a research stay to start some of the cultures. Also, this work was partly supported by the R+D+I funding lines of the Spanish Ministry of Environment “Ministerio de Medio Ambiente y Medio Rural y Marino” through the project 126/SGTB/2007/4.1 ‘Caracterizacion, conservacion y multiplicacion de narcisos endemicos de Castilla-La Mancha (gen. Narcissus, Fam. Amaryllidaceae): revalorizacion de un recurso vegetal para el desarrollo sostenible de la Reserva de la Biosfera La Mancha Humeda’.
2012 •
Fitosociologia vol. 44 (2)suppl. 1: 23-28
The application of the habitats directive in Portugal2007 •
Journal of Intelligent Material Systems and Structures
Fatigue properties by “self-heating” method: Application to orthodontic Ni-Ti wires after hydrogen charging2018 •
Ni-Ti superelastic alloys have been successfully used in orthodontic clinics thanks to their good biomechanical and biochemical behavior. However, during treatment, some orthodontic wires may break in the oral cavity. The susceptibility of these alloys to cyclic loadings and to hydrogen embrittlement is supposed to be main causes of these unexpected failures. This study presents a contribution to studying the effect of hydrogen, obtained after cathodically charging in 0.9% NaCl solution, on the fatigue behavior of Ni-Ti commercial orthodontic wires subjected to high-cycle fatigue. Fatigue tests were analyzed using self-heating method based on observing thermal effects under mechanical cyclic loading. The results obtained with self-heating approach imply that the increase in hydrogen charging time is connected with an increase in the mean stabilized temperature and a decrease in the fatigue life. Self-heating method allows a rapid prediction of the endurance limit with a good reprodu...
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David Munt