Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5587
Título: Arthropod diversity sheltered in Thaumetopoea pityocampa (Lepidoptera: Notodontidae) larval nests
Autor: Branco, Manuela
Santos, Márcia
Calvão, Teresa
Telfer, Gillian
Paiva, Maria Rosa
Palavras-chave: araneae
arthropod diversity
larval nests
Thaumetopoea pityocampa
understorey diversity
Data: 2008
Editora: Royal Entomological Society
Citação: "Insect Conservation and Diversity". ISSN 1752-458X. 1 (2008) 215-221
Resumo: 1. In pine ecosystems, the role of the larval nests of the Mediterranean defoliator Thaumetopoea pityocampa as shelter of other arthropods, was studied for the first time. In Portugal, Pinus stands which differed in understorey plant diversity and level of attack by T. pityocampa were compared. 2. The arthropod fauna found sheltering inside the nests consisted of 60 species, representing 12 foraging types. Both arthropod richness and abundance were positively correlated with nest size, expressed as larval biomass. Arthropod richness was further positively correlated with understorey plant diversity, while no correlation was detected between arthropod richness and nest density. 3. Spiders accounted for up to 50% of the species richness, while 80% of the individuals collected were either juveniles, or females with brood, implying that T. pityocampa nests are used for overwintering and brood care. Seventy-six per cent of the Araneae were nocturnal ground foragers and specialised cryptic hunters, demonstrating the occurrence of indirect interactions among species belonging to different communities, namely ground vegetation layers and forest pine coppice. 4. It was concluded that, in Mediterranean pine ecosystems, T. pityocampa nests (i) create habitat diversification and contribute to improve overwintering survival of a wide range of arthropod species; (ii) play a functional role in the food web of pine ecosystems, by promoting indirectly mediated interactions among species from different communities; and (iii) do not contribute to create habitat for symtopic phytophagous arthropods, since contrary to literature references for different types of shelters, 98% of the associated species belonged to foraging types other than T. pityocampa.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5587
ISSN: 1752-458X
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