Browsing by Author "Barreales, David"
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- La interacción entre presas afecta a la respuesta funcional de las arañas y a su preferencia por los distintos tipos de presaPublication . Benhadi-Marín, Jacinto; Pereira, José Alberto; Barreales, David; Sousa, José Paulo; Santos, Sónia A.P.
- Monitorização das populações de Anarsia lineatella Zeller e Grapholita molesta (Busck) em amendoais localizados em Tras-os-Montes (Portugal)Publication . Barreales, David; Santos, Sónia A.P.; Benhadi-Marín, Jacinto; Pereira, José A.; Ribeiro, António C.
- Short-term response of the canopy arthropod community to fire in a Portuguese olive grovePublication . Barreales, David; Santos, Sónia A.P.; Capelo, Márcio; Pereira, José; Benhadi- Marín, JacintoIn the Mediterranean region, fires have been an ecosystem modeling force for centuries. Low-mobile or small sized fauna such as arthropods are strongly affected by these periodic disturbances. Arthropods represent a hyperdiverse group and are present in all the ecosystems occupying the totality of available niches. In agroecosystems, shifts on arthropod communities are of especial relevance when the natural enemies of pests are significantly affected. The aim of this work was to assess the short-term effect on the canopy arthropod community of an unintentional fire occurred in an olive grove in Cedães-Mirandela (Portugal). Samples of arboreal entomofauna were collected in the burnt olive grove by shaking olive branches as well as in an adjacent grove (used as control area). In each olive grove, samples were collected in two areas (one adjacent and one distant) relatively to the nearest shrubland. Total arthropod abundance and the most abundant groups were compared between burnt and non-burnt groves. The effect of sample position (adjacent to shrubland vs. central area) was assessed. A total of 1318 arthropods were captured. Both the total and each dominant group abundances were significantly higher in the non-burnt grove. The fire drastically reduced the abundance of arthropods in the olive tree canopy; however, the dominant groups were almost the same is the two groves. The abundance pattern was, in general, the opposite when considering the sample position, relatively to the shrubland areas. We suggest that the colonization ability of different groups of arboreal arthropods through flight can be involved in the restoration of the community after disturbance instead the presence of seminatural surrounding areas.