CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Spider assemblages in Tierra del Fuego landscape and their impact on variable retention harvested forests
Autor/es:
LENCINAS, MV; MARTÍNEZ PASTUR, G; GRISMADO, C
Reunión:
Conferencia; IUFRO-LE Conference.; 2015
Resumen:
Spiders are relatively unknown in SouthPatagonia, but potentially useful as bioindicators. Therefore, we evaluatespider assemblage at landscape level and their impact under forest managementin Tierra del Fuego. At landscape level we compare grasslands, peatlands,Nothofagus antarctica and N. pumilio forests, while under management we studyprimary (BP) and harvested N. pumilio forests, with aggregated (RA) anddispersed (RD) retention. We used pitfall traps in 6 replicas of eachenvironment collected every 15 days during one summer. We sampled 524individuals from 41 species (families Linyphiidae, Mecysmaucheniidae,Anyphaenidae, Amaurobiidae, Zodariidae and Salticidae), with more captures atthe beginning of summer. Richness and abundance followed the pattern: N. Antarctica>N. pumilio>peatland>grassland and RD>BP>RA, with 18 species offorests, 16 of open environments and 3 generalists. In harvested forests, 7species diminished abundance, 11 were new or increased, and 5 did not vary.Ordination at landscape level grouped forests split from open environments,while RA and RD overlapped distribution but RD had greater dispersion. Spiderassemblage differed in landscape and under management, proving to be a goodpotential bioindicador of environmental conservation status.