Papers by eduardo palacios
We compiled 166 historical and recent records of Burrowing Owl sightings and/or specimens from 61... more We compiled 166 historical and recent records of Burrowing Owl sightings and/or specimens from 61 locations throughout the peninsula of Baja California and associated islands. Thirty-eight records are from the delta of the Colorado River, 57 from northwestern Baja California, 3 from the Central Desert, 12 from the Vizcaino Desert, and 12 from the Cape region. These records confirm that
Waterbirds, 2007
... The distribution of this subspecies along the Pacific coast of Mexico remains poorly known (s... more ... The distribution of this subspecies along the Pacific coast of Mexico remains poorly known (see ... Other biologists that surveyed birds in the Colorado River delta early in the 20th ... Locations in southern Sonora and northern Sinaloa were suggested as breeding sites (van Rossem ...
El gallito marino menor (Sternula antillarum) es una especie sujeta a protección especial, que an... more El gallito marino menor (Sternula antillarum) es una especie sujeta a protección especial, que anida en colonias pequeñas en hábitats costeros. Las mareas altas son un problema para la anidación de S. antillarum en Baja California Sur, pues causan la inundación de algunas colonias. Para reducir el impacto potencial del fl ujo de marea alta sobre los nidos, se elevó 20 cm el nivel del suelo por medio de una plataforma elevada construida con llantas de desecho rellenas y cubiertas de arena. La ocupación de este sitio por S. antillarum se monitoreó durante las temporadas reproductivas de 1990, y de 2002 a 2005. Las mareas altas no afectaron los nidos establecidos sobre la plataforma y la densidad de nidos sobre ella fue mayor que la que hubo en el terreno natural de la planicie costera adyacente. Este método de manejo del hábitat de anidación de S. antillarum es una buena alternativa en los sitios con riesgo por fl ujo de marea.
Waterbirds, 2007
... Western Birds 23:1119. Danemann, GD and R. Carmona. 2000. Breeding birds of the Guerrero Neg... more ... Western Birds 23:1119. Danemann, GD and R. Carmona. 2000. Breeding birds of the Guerrero Negro Saltworks, Baja California Sur, Mexico. Western Birds 31:195199. ... Aves de Nayarit. Universidad Autónoma de Nayarit, Tepic. Everett, WT and DW Anderson. 1991. ...
Waterbirds, 2006
Abstract The spatial distribution of avifauna was documented in Magdalena Bay, the largest coasta... more Abstract The spatial distribution of avifauna was documented in Magdalena Bay, the largest coastal wetland on the Pacific coast of the Baja California peninsula. An inventory of waterbirds in the three wetland zones of Magdalena Bay-Almejas, Baja California Sur was ...
Community structure and association of waterbirds with spatial heterogeneity in the Bahía Magdale... more Community structure and association of waterbirds with spatial heterogeneity in the Bahía Magdalena-Almejas wetland complex, Baja California Sur, Mexico. To test the hypothesis that spatial heterogeneity determines waterbird diversity in a coastal wetland, we compared waterbird density, diversity, and species composition among various habitats and landscapes units in Bahía Magdalena-Almejas, Baja California Sur, Mexico. Based on diversity patterns and bird distribution, we assessed the effect of coastal development on the waterbird community structure. To gather information on habitat features and waterbird populations we conducted waterbird censuses in 329 habitat segments along the internal coastline of the study area, from February 2002 to February 2003. We performed non-parametric analyses to test the null hypothesis of no diference on waterbird density, and diversity among landscape units and seasons. The species composition was evaluated using ordination techniques. Waterbird density was higher in winter and autumn in the three lagoons of the study area, particularly in the insular coast, sandy beach and dunes; it was higher in the few segments of antropic sustrate. Diversity was significantly higher in mangrove habitat along the peninsular coast, and in mangrove-dunes association on the insular coast. Although modification of coastal natural habitat and boat transit disturbance had no influence on waterbird density or diversity, the highest richness of waterbirds occurred in well preserved areas. Species composition analysis showed differences between Santo Domingo Channel and Magdalena Bay. Pelagic and mangrove habitat had a species composition difference higher than those associations in other habitats. Such differences in species assemblages by habitat and landscape units suggest that communities are structured according to the range of available natural resources in structurally complex habitats, and that dominant piscivorous waterbird species were favored in this community. Rev. Biol. Trop. 56 (1): 371-389. Epub 2008 March 31.
Uploads
Papers by eduardo palacios