The ivory-billed woodpecker (Campephilus principalis), long suspected to be extinct, has been rediscovered in the Big Woods region of eastern Arkansas. Visual encounters during 2004 and 2005, and analysis of a video clip from April 2004, confirm the existence of at least one male. Acoustic signatures consistent with Campephilus display drums also have been heard from the region. Extensive efforts to find birds away from the primary encounter site remain unsuccessful, but potential habitat for a thinly distributed source population is vast (over 220,000 hectares).
Logging in the Sunda region of Southeast Asia has affected nearly all lowland forests. Despitenumerous studies on the effects of this logging, its impact on vertebrate communities remains unclear because few researchers have compared more than two independent study sites. I assessed whether a community of 14 woodpecker species in West Kalimantan, Indonesian Borneo, has been affected by logging in lowlands and whether hill-forest reserves are a suitable alternative for woodpecker conservation. Eight study sites in lowland plains (<70 m elevation) occurred in unlogged forest and forests with a range of increasing logging intensities. In addition, two sites were sampled in unlogged hill forest (120-400 m elevation). Woodpecker species richness and composition in lowlands remained unchanged over the range of increasing logging disturbance. Over this range, however, significant reductions occurred in total woodpecker biomass (61% reduction), total woodpecker density (41% reduction), and densities of Checker-throated Woodpecker (Picus mentalis) and Great Slaty Woodpecker (Mulleripicus pulverulentus), which were reduced 85% and 83%, respectively. The quantity of timber removed (cut basal area) was a better predictor of woodpecker density than the proportion of an area remaining as unlogged patches. Time since logging, which varied from 3 to 22 years, had little predictive value. Within home ranges in logged areas, woodpeckers foraged preferentially in unlogged patches but preferred logged patches for other activities. Hill forest, although unlogged, had woodpecker densities, biomass, and species richness even lower than heavily logged lowland sites. Notably, the Great Slaty Woodpecker was absent from hill sites, which implies that hill reserves are not an option for conservation of this logging-sensitive species. The responses of this species in population density may serve as an indicator in forest management. Protection of logged lowland forest should be preferred over that of unlogged hill forests, but emphasis in conservation effort in the Sunda region is currently on hill forests. Safeguarding the few remaining areas of unlogged lowland forest on Borneo must be a top priority because those forests are of vital importance as reference sites in biodiversity studies. Una Comparación Multi-Sitio de Comunidades de Pájaros Carpinteros en Bosques de Tierras Bajas y Colinas en BorneoResumen: La actividad maderera ha afectado a casi todos los bosque de tierras bajas en la región Sunda en el Sureste de Asia. A pesar de numerosos estudios sobre los efectos de esta actividad, su impacto sobre comunidades de vertebrados aun no es claro porque pocos investigadores han comparado más de dos sitios de estudio independientes. Evalué si una comunidad de 14 especies de pájaros carpinteros fue afectada por la actividad maderera en las tierras bajas y si las reservas de bosques en colinas son una alternativa adecuada para la conservación de los pájaros carpinteros. Ocho sitios de estudio en las llanuras bajas (<70 m de altitud) estaban ...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.