Evaluación del riesgo de invasión de plantas no-nativas en gradientes de elevación de la zona sur de los Andes.
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Date
2025
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Publisher
Universidad de Concepción
Abstract
La invasión de plantas no nativas representa una creciente amenaza para la biodiversidad y los ecosistemas andinos. El estudio realizado analiza el riesgo de invasión de estas especies en gradientes de elevación en la zona sur de los Andes, región de Aysén, específicamente desde el Centro Sky El Fraile, Parque Nacional Cerro Castillo y Coyhaique Alto, considerando diversos factores. El objetivo de este estudio es evaluar cuales son las especies de plantas no-nativas más abundantes que están expandiéndose hacia zonas de mayor altitud en montañas de la zona sur de los Andes. A través del análisis de la base de datos proporcionada por el Laboratorio de Invasiones Biológicas (LIB) se identificaron 35 especies de plantas no nativas, las cuales además fueron evaluadas mediante el sistema WRA para obtener su índice de riesgo como especie invasora, el resultado indicó que todas entraban en esa categoría. Como parte del estudio, se elaboró un manual para la identificación de especies de plantas no nativas en ecosistemas con gradientes altitudinales, el cual busca apoyar la gestión de áreas protegidas y concientizar sobre los riesgos asociados a invasiones. Los resultados indican que la abundancia de especies no nativas disminuye con la altitud, pero algunas especies rompen esta tendencia, lo cual demuestra que en algunos años serán capaces de alcanzar zonas andinas.
The invasion of non-native plants represents a growing threat to biodiversity and Andean ecosystems. This study analyzes the risk of invasion of these species in elevation gradients in the southern Andes, Aysén region, specifically from El Fraile Sky Center, Cerro Castillo National Park and Coyhaique Alto, considering several factors. The objective of this study is to evaluate which are the most abundant non-native plant species that are expanding towards higher altitudes in the mountains of the southern Andes. Through the analysis of the database provided by the Biological Invasions Laboratory (LIB), 35 non-native plant species were identified, which were also evaluated using the WRA system to obtain their risk index as invasive species, the result indicated that all of them fell into that category. As part of the study, a manual for the identification of non-native plant species in ecosystems with altitudinal gradients was developed to support the management of protected areas and raise awareness of the risks associated with invasions. The results indicate that the abundance of non-native species decreases with altitude, but some species break this trend, which shows that in a few years they will be able to reach Andean areas.
The invasion of non-native plants represents a growing threat to biodiversity and Andean ecosystems. This study analyzes the risk of invasion of these species in elevation gradients in the southern Andes, Aysén region, specifically from El Fraile Sky Center, Cerro Castillo National Park and Coyhaique Alto, considering several factors. The objective of this study is to evaluate which are the most abundant non-native plant species that are expanding towards higher altitudes in the mountains of the southern Andes. Through the analysis of the database provided by the Biological Invasions Laboratory (LIB), 35 non-native plant species were identified, which were also evaluated using the WRA system to obtain their risk index as invasive species, the result indicated that all of them fell into that category. As part of the study, a manual for the identification of non-native plant species in ecosystems with altitudinal gradients was developed to support the management of protected areas and raise awareness of the risks associated with invasions. The results indicate that the abundance of non-native species decreases with altitude, but some species break this trend, which shows that in a few years they will be able to reach Andean areas.
Description
Tesis presentada para optar al título de Ingeniera en Conservación de Recursos Naturales
Keywords
Biodiversidad, Plantas invasivas, Cordillera de los Andes