Konzentrierte Nahrungssuche bei Magellanspechten: Die Bedeutung von Baumalter, Waldzusammensetzung und Offenhabitaten

Abstract

BackgroundLarge woodpecker species with stable territories, specialized diets and narrow habitat choices, such as the Magellanic Woodpecker (Campephilus magellanicus), are expected to adjust their movements based on the distribution of available resources within territories. Thus, Magellanic Woodpeckers should concentrate foraging activity in areas of higher quality, a behavior consistent with the area-restricted search (ARS) behavior. Although previous studies have deepened the understanding of how Magellanic woodpeckers select habitats, the assessment of ARS behavior would contribute to the identi cation of feeding areas important for their conservation and habitats hindering their movement. MethodsWe addressed the independent effects of tree senescence, forest succession, stand composition and open habitats on the adoption of area-restricted search (ARS) behavior in Magellanic Woodpeckers in a heterogeneous landscape dominated by southern beech forest in southern South America. Using GPS relocations from 24 woodpeckers, we estimated the First-Passage Time (FPT), a measure of the time individuals remain in a given area, with longer FPT values indicating the adoption of an ARS behavior. We

Unravelling the cavity‐nesting network at large spatial scales: The biogeographic role of woodpeckers as ecosystem engineers

“…In these biomes, a few species act as primary cavity excavators with some of them, such as woodpeckers, being considered indicator species (Ojeda, 2004; Ojeda & Chazarreta, 2006). However, the community‐level impact of woodpeckers may also be influenced by the environmental characteristics of those temperate forests, such as tree species diversity, structural heterogeneity, and tree decay stage (Alaniz et al., 2021; Soto et al., 2018; Vergara et al., 2021). Disentangling the role of woodpeckers as ecological engineers structuring cavity‐nesting networks at broad spatial scales remains a challenging topic.…”