Effects of Clear-Cut Harvesting on Boreal Ground-Beetle Assemblages (Coleoptera: Carabidae) in Western Canada

摘要: We compared pitfall catches from four types of mature lodgepole pine—white spruce forest with those five age classes young regenerating subsequent to clear-cutting. Ground beetles were most abundant in the youngest sites (1–2 years since cutting) and stands on moist soil. Species richness was higher than forest. Cluster analysis grouped ground-beetle fauna according type, suggesting that there is a general pattern recovery after logging. Responses common species cutting fell into three groups: (1) generalists (2 species) not dramatically affected, (2) open habitat (27 appeared and/or increased abundance, (3) (10 disappeared or decreased abundance. Populations many appear recover following logging, but several specialists did recolonize even oldest stands. Furthermore, fragmentation creation large areas relatively homogeneous stages through logging may have detrimental long-term effects more generalists. must better understand subtle variations order maintain invertebrate diversity while harvesting boreal forest. Nosotros comparamos la captura de carabidos (Coleoptera: Carabidae), utilizando trampas suelo, en cuatro tipos bosques maduros pino (Pinus contorta)—abeto blanco (Picea glauca), con aquella cinco clases jovenes regeneracion despues tala indiscriminada. La abundancia fue mayor los sitios anos tala), y rodales suelo humedo. riqueza especies que maduros. Analisis agrupamiento (cluster analysis) separo acuerdo edad al tipo bosque, sugiriendo existe un patron recuperacion. Las respuestas comunes del bosque recayeron tres grupos: generalistas especies) no fueron notablemente afectadas, habitats abiertos aparacieron y/o incrementaron desaparecieron o abundancia. poblaciones muchas parecen recuperarse tala, pero varias especialistas ni siquiera recolonizaron mas antiguos regeneracion. Mas aun, fragmentacion creacion extensas relativamente homogeneas causa puede tener efectos adversos largo plazo, aun para las abundantes bosque. Debemos comprender mejor sutiles variaciones el habitat, poder mantener diversidad invertebrados cuando se explotan boreales.