Avaliação preliminar da diversidade e abundância de artrópodes num pomar de aveleiras

Abstract

Functional biodiversity is an asset for agricultural systems, particularly due to the role played by the promotion of ecosystem services, namely the natural control of crop pests. The biodiversity of arthropods associated with the hazelnut orchards in Portugal is little known, specially in relation with the natural enemies, and resumed to lists of the main pests. In this sense, and in order to contribute to the conservation and promotion of functional biodiversity in the hazelnut orchards, it is important to know the diversity and abundance of arthropods of this agroecosystem. The work was carried out in the organic hazelnut orchard of Estacao Agraria de Viseu. Arthropods were collected, between May and August 2018, using the knockdown technique, after which they were screened in the laboratory and selected by orders, morphotypes and functional roles (predators, parasitoids, phytophages, detritivorous and indifferent). About 1557 arthropods were captured belonging to 9 orders from the class Insecta class (88% of the inidividuals) and the class Arachnida class (order: Araneae). Regarding the class Insecta, the most abundant orders were: Hemiptera - suborder Heteroptera, (Anthocoridae and Miridae), Coleoptera (greater number of morphotypes, in particular of the Coccinelidae family) and, also, Hymenoptera, Dermaptera and Neuroptera. Keywords: dried fruits, entomofauna, functional biodiversity, Corylus avellana L.