Abstract:El gecko de Lima Phyllodactylus sentosus (Dixon & Huey, 1970) identificado como en peligro crítico de extinción ha sido registrado sólo en algunas localidades entre los valles de los ríos Rímac y Lurín, en el centro y sur de la ciudad de Lima, Región Lima, sin embargo, su distribución hacia el norte no está documentada. En el presente trabajo se reporta por primera vez la presencia de P. sentosus en la Huaca Tambo Inga, ubicada en el margen derecho del valle del río Chillón en el distrito de Puente Pie… Show more
“… Figure 1 Distribution map of the Lima leaf-toed gecko. ( A ) Sites where the species had been previously recorded 11 , 13 – 15 in the province of Lima (cross) and sampling localities used in this study (circle). ( B ) Photograph of a juvenile Lima leaf-toed gecko found in the Pachacamac huaca .…”
Small species with high home fidelity, high ecological specialization or low vagility are particularly prone to suffer from habitat modification and fragmentation. The Lima leaf-toed gecko (Phyllodactylus sentosus) is a critically endangered Peruvian species that shelters mostly in pre-Incan archeological areas called huacas, where the original environmental conditions are maintained. We used genotyping by sequencing to understand the population genomic history of P. sentosus. We found low genetic diversity (He 0.0406–0.134 and nucleotide diversity 0.0812–0.145) and deviations of the observed heterozygosity relative to the expected heterozygosity in some populations (Fis − 0.0202 to 0.0187). In all analyses, a clear population structuring was observed that cannot be explained by isolation by distance alone. Also, low levels of historical gene flow were observed between most populations, which decreased as shown in contemporary migration rate analysis. Demographic inference suggests these populations experienced bottleneck events during the last 5 ka. These results indicate that habitat modification since pre-Incan civilizations severely affected these populations, which currently face even more drastic urbanization threats. Finally, our predictions show that this species could become extinct in a decade without further intervention, which calls for urgent conservation actions being undertaken.
“… Figure 1 Distribution map of the Lima leaf-toed gecko. ( A ) Sites where the species had been previously recorded 11 , 13 – 15 in the province of Lima (cross) and sampling localities used in this study (circle). ( B ) Photograph of a juvenile Lima leaf-toed gecko found in the Pachacamac huaca .…”
Small species with high home fidelity, high ecological specialization or low vagility are particularly prone to suffer from habitat modification and fragmentation. The Lima leaf-toed gecko (Phyllodactylus sentosus) is a critically endangered Peruvian species that shelters mostly in pre-Incan archeological areas called huacas, where the original environmental conditions are maintained. We used genotyping by sequencing to understand the population genomic history of P. sentosus. We found low genetic diversity (He 0.0406–0.134 and nucleotide diversity 0.0812–0.145) and deviations of the observed heterozygosity relative to the expected heterozygosity in some populations (Fis − 0.0202 to 0.0187). In all analyses, a clear population structuring was observed that cannot be explained by isolation by distance alone. Also, low levels of historical gene flow were observed between most populations, which decreased as shown in contemporary migration rate analysis. Demographic inference suggests these populations experienced bottleneck events during the last 5 ka. These results indicate that habitat modification since pre-Incan civilizations severely affected these populations, which currently face even more drastic urbanization threats. Finally, our predictions show that this species could become extinct in a decade without further intervention, which calls for urgent conservation actions being undertaken.
“…Las zonas arqueológicas y los ecosistemas adyacentes a éstas han demostrado ser ambientes adecuados para la conservación de la biodiversidad (Somaweera et al, 2001;Báez et al, 2016). Para el caso específico de la herpetofauna, se ha determinado cierta relación positiva entre el refugio que proveen los sitios arqueológicos y el mantenimiento de algunas poblaciones de especies (Kelly-Hernández et al, 2014;Márquez-Rodríguez, 2014;Olivera et al, 2016).…”
Se realizó un listado de las especies de anfibios y reptiles del sitio arqueológico Iglesia Vieja. Este sitio se localiza entre la costa y la Sierra Madre de Chiapas a 711 msnm. Los muestreos se realizaron mensualmente entre junio de 2014 y mayo de 2015 abarcando las temporadas de lluvias y secas en dos tipos de vegetación (herbácea y arbórea). La herpetofauna estuvo representada por 61 especies (12 anfibios y 49 reptiles). Los anfibios se agruparon en ocho familias, 10 géneros y 12 especies; para los reptiles, el grupo de las lagartijas se constituyó por 13 familias, 16 géneros y 20 especies; mientras que las serpientes estuvieron representadas por siete familias, 25 géneros y 29 especies. Los estimadores de riqueza Jackknife 1 y Bootstrap mostraron una adecuada representación de la composición. Las curvas de abundancia reflejaron una mayor dominancia de especies generalistas o asociadas a perturbación (Hemidactylus frenatus, Basiliscus vittatus, Rhinella horribilis). El 35% de las especies registradas se encuentra bajo alguna categoría de riesgo de acuerdo a la normativa federal. Aunque el área se localiza en una zona de transición fisiográfica, la herpetofauna mostró una alta afinidad con la Planicie costera del Pacífico (66.53%). Las áreas destinadas a preservar el patrimonio arqueológico constituyen también espacios que contribuyen a mantener los procesos biológicos. Estos espacios rara vez cuentan con inventarios faunísticos. Este trabajo representa una contribución al conocimiento de la biota asociada a sitios arqueológicos en Chiapas, y el inicio de una línea base para el manejo de una zona arqueológica y su biodiversidad, así como para futuras investigaciones sobre la ecología de un grupo prioritario.
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.
