Aggregate retention in two Tierra del Fuego Nothofagus forests: Short-term effects on bird abundance

Alternative silvicultural practices with variable retention improve bird conservation in managed South Patagonian forests

“…Each year after harvesting was compared among silvicultural treatments (rows), and each silvicultural treatment was analyzed among years (columns). winds, may limit the assemblage of birds to only a subset of all austral temperate forest species that are well adapted to this climate (Vergara and Schlatter, 2006). Only 15 species were detected in this study, as reported by Lencinas et al (2005), which is more than those described by Deferrari et al (2001) and Venegas (2000) (12 and 10 species, respectively).…”

“…However, most studies have assessed short-term effects of traditional forest practices (e.g. Costello et al, 2000;King and DeGraaf, 2000;Wardell-Johnson and Williams, 2000), and recently harvesting with different degrees of retention have been evaluated (Rodewald and Yahner, 2000;Vergara and Schlatter, 2006;Waterhouse and Armleder, 2007). Nonetheless, medium-or long-term scale research is lacking.…”

Plantation forests and biodiversity: oxymoron or opportunity?

“…Variable retention harvesting has been advocated to mitigate detrimental impacts of clear-cutting on biodiversity in large harvested areas. Residual tree patches can function as valuable refugia, at least in the short-term, for frogs (Chan-McLeod and Moy 2007), spiders and carabids (Hyvarinen et al 2005;Matveinen-Huju et al 2006) and birds (Vergara and Schlatter 2006). The beneWcial eVects of green-tree retention are expected to increase with patch size (Chan-McLeod and Moy 2007) and decrease with distance from undisturbed areas (Deans et al 2005;Vergara and Schlatter 2006).…”

An examination of stocking and early growth in the Warra silvicultural systems trial confirms the importance of a burnt seedbed for vigorous regeneration in Eucalyptus obliqua forest

“…Franklin et al, 1997). Trials to develop more ecologically based silviculture for temperate forests, whilst maintaining safe workplaces for the harvesters, have consequently been under development in the last two decades in Australia (Squire, 1990;Campbell, 1997;Lindenmayer, 2007), the Pacific northwest of the USA (Aubry et al, 1999;Franklin et al, 1999), Canada (Arnott and Beese, 1997), South America (Vergara and Schlatter, 2006;Martinez Pastur et al, 2007) and Europe (Fries et al, 1997). Trials of alternatives to clearfelling in lowland wet eucalypt forest in Tasmania were undertaken in the 1990s at Forestier (Neyland et al, 1999) and Arve (Bassett et al, 2000), but neither developed safe and practical alternatives to clearfelling that could be more widely applied.…”