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vol.78 número1Ultraestructura de las glándulas de seda en hembras adultas de tres especies de avispas del género Microstigmus (Hymenoptera: Sphecidae: Pemphredoninae)Population biology of the subtidal kelps Macrocystis integrifolia and Lessonia trabeculata (Laminariales, Phaeophyceae) in an upwelling ecosystem of northern Chile: interannual variability and El Niño 1997-1998 índice de autoresíndice de assuntospesquisa de artigos
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Revista chilena de historia natural

versão impressa ISSN 0716-078X

Resumo

SUAREZ, LORENA H.; AGUILAR, ANGÉLICA V.  e  GONZALES, WILFREDO L.. Infestation patterns of xylophagous insects in second growth stands of Nothofagus obliqua Mirb. and Nothofagus dombeyi (Mirb.) Oerst. (Fagales: Nothofagaceae). Rev. chil. hist. nat. [online]. 2005, vol.78, n.1, pp.23-32. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2005000100003.

Infestation patterns of xylophagous insects were evaluated in second growth stands of Nothofagus obliqua and Nothofagus dombeyi in Valdivia, Osorno and Llanquihue provinces of Chile. The analysis addressed two scales. First, at the individual level, diameter at breast height (DBH) and canopy class (CC) of the host tree were used as predictor traits of xylophagous damage. Second, at the stand level, variables such as total tree density, host density, species richness and cover (arboreal, shrubby, herbaceous and epiphytic strata) and their asociation with infestation average were considered. The infestation mean was 9.35 % for N. obliqua and 15.89 % for N. dombeyi. At individual level both DBH and CC were positively associated with damage presence. However, the best predictor of tree infestation was DBH in both N. dombeyi and N. obliqua, greater DBH increasing the probability to find an infested tree. At the stand level, no relationship was found between insect infestation and evaluated traits in N. obliqua, whereas N. dombeyi stands with high species richness in the shrubby stratum and/or with higher total tree density and host density showed the lowest infestation levels

Palavras-chave : herbivory; xylophagous insect; wood-boring insect; Nothofagus obliqua; Nothofagus dombeyi.

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