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Atmospheric pathways and distance range analysis of castanea pollen transport in Southern Spain / Rocio López-Orozco in Forests, vol 11 n° 10 (October 2020)  

Public [article]  inForests > vol 11 n° 10 (October 2020) . - n° 1092 Titre : Atmospheric pathways and distance range analysis of castanea pollen transport in Southern Spain Type de document : Article/Communication Auteurs : Rocio López-Orozco, Auteur ; Miguel Angel Hernández-Ceballos, Auteur ; Carmen Galan, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : n° 1092 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] Andalousie [Termes IGN] Castanea (genre) [Termes IGN] circulation atmosphérique [Termes IGN] génétique forestière [Termes IGN] pollen [Termes IGN] transport éolien [Vedettes matières IGN] Sylviculture Résumé : (auteur) The sweet chestnut (Castanea sativa Mill.) is the only native species of this genus in Europe, where it faces various threats that are causing a severe decrease in populations, with the resulting loss of genetic diversity. In the Iberian Peninsula, it is of high economic and ecological importance, being well represented, especially in northern areas, whilst it is limited to isolated populations in medium-range mountains in southern Spain (Andalusia region). Taking advantage of this fragmented distribution, this study analyzes the dynamics of atmospheric transport of Castanea pollen through Andalusia region in order to obtain a better understanding of the pollination pathways as a key aspect of the floral biology of this partially anemophilous species. The aerobiological characteristics of this species are also of special interest since its pollen has been recognized as allergenic. Pollen transport pathways were studied by applying back-trajectories analysis together with aerobiological, phenological, land cover, and meteorological data. The results reveal that airborne Castanea pollen concentrations recorded in the city of Cordoba, in the center of Andalusia region, reach medium- and even long-range distances. The backward-trajectory analysis indicates that most of the pollen data detected outside the Castanea flowering season were related to westerly slow and easterly airflows. Furthermore, some of the case studies analyzed indicate the presence of southerly airflow patterns, which could influence medium- and long-range transport events from chestnut populations further south, even from those located in north African mountains. The integrated analysis of the results offers us better knowledge of the cross-pollination pathways of this endangered species, which help us to understand its genetic flows, as a basis for designing conservation strategies for this highly fragmented species in southern Spain. Numéro de notice : A2020-755 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3390/f11101092 Date de publication en ligne : 14/10/2020 En ligne : https://doi.org/10.3390/f11101092 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96461 [article]