Abstract
Spiders are sensitive to disturbances that occur on forest structure. It is a need to understand how this activity affects spider assemblies to feature sustainable forest management guidelines. Our goal was to study the response of the araneofauna to logging (AF) in the piedmont forest, Argentina. We collected spiders using pitfall traps and we measured vegetation variables at AF and a reference area (R). The capture rate of Linyphiidae spiders were higher at AF than R, and the capture rate of cursorial guild were inverse. This could be due to the fact that Linyphiidae spiders have a great power of re-establishing after disturbances, meanwhile cursorial spiders have specific habitat requirements what make them sensitive to forest modifications. The canonical correspondence analysis shows that spiders are associated with high woody cover and the understory growth, suggesting that they respond differentially to changes on forest. To ensure the conservation of spiders in logged areas it is necessary to retain intact areas within them. Keywords: arthropods, forest, habitat complexity, forest management.
Highlights
Las arañas son sensibles a las alteraciones que se produzcan sobre la estructura del bosque
Spiders are sensitive to disturbances that occur on forest structure
Our goal was to study the response of the araneofauna to logging (AF) in the piedmont forest, Argentina
Summary
En Argentina, las Yungas Australes ocupan un gradiente altitudinal entre los 400 y 2500 msnm (Lomáscolo et al, 2010) que permite diferenciar distintos pisos de la vegetación: Pastizal de Altura (> 2000 msnm), Bosque Montano (1500-2000 msnm), Selva Montana (900-1500 msnm) y Selva Pedemontana (400-900 msnm) (Cabrera, 1971; Brown et al, 2002; Lomáscolo et al, 2010). Las Yungas Australes son importantes por presentar un alto valor de biodiversidad y un gran número de endemismos (Brown et al, 2002). La Selva Pedemontana (SP) constituye el piso altitudinal basal de las Yungas Australes con un régimen de precipitaciones monzónico, con lluvias concentradas entre los meses de noviembre y marzo en un rango de 800-1000 mm y una temperatura media anual de 19°C (Cabrera 1971; Brown, 2009; Pidgeon et al, 2015). Ana Sofía Alcalde, Natalia Politi, José Antonio Corronca, Luis Osvaldo Rivera arbóreos, y un suelo con escasa acumulación de hojarasca (Brown, 2009)
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