Summary1. Tropical montane amphibians have been the focus of recent and crucial conservation efforts. These initiatives require understanding on how elevation influences amphibian body temperature beyond the simplistic assumption of a monotonical decrease with elevation. This study addresses patterns and potential for inference in this context. 2. As elevation increases, mean body temperature (BT) of tropical montane amphibians decreases linearly, but intrapopulation variation (VAR) in BT increases exponentially. These relationships are influenced by biome structure, but display both local nuances and speciesspecific remarks. 3. Substrate temperature (ST) and BT hold a close relationship across elevation. The noise around this relationship is lowest in mid-elevation cloud forests and maximum in the paramo, a biome above the tree line. 4. The relationships between BT and ST, and between elevation and either BT or VAR, are valuable to infer general patterns of thermal ecology for amphibians and to highlight speciesspecific exceptional cases. 5. The BT of montane tropical amphibians can be estimated from temperature data collected at a scale compatible with the size and microhabitat of individual frogs. Estimates from elevation are valid as general trends that can be enhanced if natural history is taken into account. Worldclim data allow for rough inference only and have limited predictive power. 6. A framework is proposed to study how the BT and VAR of amphibians change with elevation. This framework encompasses information on biome structure and natural history.
El presente estudio buscó determinar el efecto de la heterogeneidad espacial, producto de los mosaicos vegetales y gradientes ambientales y estructurales del páramo, sobre la estructura del ensamblaje de anuros en un sector del Parque Nacional Chingaza. Se registraron variables ambientales y estructurales en seis mosaicos de vegetación y se calcularon métricas de paisaje en áreas de influencia de 50 y 100 m, a partir de fotografías aéreas tomadas con dron. Al concluir 162 horas/persona de muestreo, se encontraron 45 individuos pertenecientes a cuatro especies. Las variables mayormente relacionadas con la estructura de los ensamblajes de anuros, variaron con el área de influencia, así: (a) a nivel del gradiente ambiental-estructural en los mosaicos de vegetación (escala de microhábitat), el porcentaje de frailejones, número de troncos de frailejones caídos, temperatura del aire y velocidad del viento fueron las más determinantes; (b) a nivel de la unidad de paisaje, el área de influencia de 50 m, se evidenció el efecto del número de clases y en particular la extensión de las clases de turbera y vegetación de turbera. Finalmente, (c) al área de influencia de 100 m, la configuración de las unidades de paisaje fue más importante, principalmente la extensión de las clases de turbera y matorrales bajos entremezclados con pajonales y frailejonales. Los resultados sugieren que los anuros presentan una respuesta dependiente de la escala ante la heterogeneidad espacial, aspecto que se debe considerar en los planes de manejo del área protegida al momento de estructurar esquemas de monitoreo poblacional.
Objetivos: Caracterizar la herpetofauna y determinar su distribución espacial en el campus de la Universidad del Magdalena. Metodología: El estudio se realizó mediante el método de búsquedas por encuentro casual empezando desde las 9:00-12:00, 16:00-18:00, 19:00-21:00 horas, en época seca y lluviosa. También se instalaron dos trampas de caída con una barrera de interceptación en la zona de bosque en recuperación para tratar de capturar el mayor número de especies posibles. Resultados: Entre abril de 2011 y abril de 2013 se registraron 39 especies de herpetos así, siete especies de anfibios y 32 especies de reptiles, distribuidas en tres y 14 familias respectivamente, en el campus de
Pseudogonatodes furvus is an endemic gecko from the region of the Sierra Nevada de Santa Marta, an isolated massif located in the continental Caribbean region of Colombia. Pseudogonatodes furvus is the type species of the genus, and its morphology and natural history remain poorly known. This lizard was described based on two specimens. After its description, the species has only been mentioned in a handful of taxonomic studies of Pseudogonatodes, in which a few morphological characters of P. furvus have been mentioned. One other paper reported two new localities, without providing new information on the external morphology, especially the lepidosis of the newly obtained specimens. Here we review the external morphology of P. furvus, based on examination of the holotype and six additional specimens. We provide an extended diagnosis and definition, description of holotype, variation, comparisons with other Pseudogonatodes, geographic distribution (adding a fourth locality to the known distribution for the species), and conservation status. Additionally, we describe osteological features for the diagnosis of the genus.
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