Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: community responses to variable retention management and their association to natural ecosystems

摘要: Abstract Variable retention mitigates negative effects of traditional harvesting on biodiversity, maintaining legacies in harvested forests as habitat for sensitive species, and generating other habitats early-seral species. Their assessment, including drivers, has a high concern society. Likewise, species association with ecosystems the landscape (as different forest types, grasslands peatlands) are unknown some taxa regions, could explain flow into areas. Therefore, we evaluated harvest impact ground-dwelling spiders vascular plants, their diversity to vegetation types matrix, richness abundance correlations structure. Six natural common were studied Tierra del Fuego (Argentina), where variable been implemented: aggregated (AR) dispersed (DR) Nothofagus pumilio forests, unharvested primary (NPF) reference, (G), peatlands (P), N. antarctica (NAF). We surveyed (N = 432, by 6 habitats × 6 replicates × 6 collections × 2 years), plants (N = 36, replicates), characterized structure wooded ecosystems. determined both richness, relative (total captures/ground cover) Shannon-Wiener Pielou indices, compared assemblage composition indicator among treatments analyzed correlations. sampled 752 individuals from 33 (six families), 79 plant (28 families) that averaged 52% total cover. Total spider captures overall higher DR > NPF > AR, although differences not detected at plot level any variable. For understory cover highest DR, followed AR NPF, well level, no affectation indices. occurred NAF NPF spiders, G unique assemblages each type despite shared Assemblages also differed areas, mainly new conditions generated reduction variables (evidenced correlations), while maintained similar contributing conservation specialists. Indicators several habitats. This study highlights importance provides tools developing monitoring strategies policies.