Especies de arañas exóticas en Chile: distribución actual, y proyecciones futuras en un contexto de cambio climático.
Loading...
Date
2025
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
Las arañas exóticas pueden alcanzar altas densidades locales, generando un impacto significativo en los ecosistemas nativos. Esto se debe principalmente a factores como la superposición de hábitats, el solapamiento de nichos ecológicos y su capacidad para colonizar rápidamente nuevas áreas. Para este estudio, se modeló el nicho a cinco especies de arañas exóticas y cinco especies de arañas nativas, en el que se evaluó el potencial invasor de las especies exóticas en relación con las nativas, y se analizó si podrán beneficiarse del cambio climático. Los resultados indican que existe una posible competencia entre las arañas exóticas y nativas, ya que la superposición en todos los casos es mayor a 50%, por lo que pueden estar compitiendo por microhábitats y presas. Para las proyecciones futuras, las arañas presentan respuestas similares influenciadas por las mismas variables, en el que la mayoría de los casos se observa una pérdida de hábitat, que varía en magnitud dependiendo de la especie. Los resultados muestran coincidencias significativas en nichos tróficos, uso de microhábitats y distribución actual entre ambos grupos de arañas, mientras que los escenarios climáticos no parecen ser un factor determinante en estas arañas.
Exotic spiders can reach high local densities, generating a significant impact on native ecosystems. This is primarily due to factors such as habitat overlap, ecological niche overlap, and their ability to quickly colonize new areas. For this study, the niche of five species of exotic spiders and five species of native spiders was modeled, evaluating the invasive potential of the exotic species in relation to the native ones, and analyzing whether they may benefit from climate change. The results indicate that there is possible competition between exotic and native spiders, as the overlap in all cases is greater than 50%, suggesting they may be competing for microhabitats and prey. For future projections, spiders show similar responses influenced by the same variables, with most cases indicating habitat loss, which varies in magnitude depending on the species. The results show significant coincidences in trophic niches, microhabitat use, and current distribution between both groups of spiders, while climate scenarios do not appear to be a determining factor for these spiders.
Exotic spiders can reach high local densities, generating a significant impact on native ecosystems. This is primarily due to factors such as habitat overlap, ecological niche overlap, and their ability to quickly colonize new areas. For this study, the niche of five species of exotic spiders and five species of native spiders was modeled, evaluating the invasive potential of the exotic species in relation to the native ones, and analyzing whether they may benefit from climate change. The results indicate that there is possible competition between exotic and native spiders, as the overlap in all cases is greater than 50%, suggesting they may be competing for microhabitats and prey. For future projections, spiders show similar responses influenced by the same variables, with most cases indicating habitat loss, which varies in magnitude depending on the species. The results show significant coincidences in trophic niches, microhabitat use, and current distribution between both groups of spiders, while climate scenarios do not appear to be a determining factor for these spiders.
Description
Tesis presentada para optar al título de Bióloga
Keywords
Arañas, Adaptación (Biología), Ecosistemas