Línea base para la restauración de citronella mucronata en la comuna de Penco.
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Date
2024
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
El bosque nativo en la localidad de Penco se ha visto severamente afectado debido a la transformación del paisaje a causa de la expansión forestal, la cual cubre un 75% de la superficie del territorio aproximadamente. Actualmente, queda un pequeño remanente de 251 hectáreas aproximadamente, distribuido en pequeños parches donde solo uno de ellos supera las 10 hectáreas en extensión. Esto ha provocado una reducción en la población de especies endémicas amenazadas, entre ellas Citronella mucronata. En este estudio se planteó realizar una línea base para la restauración del hábitat de la especie dentro del área de la cuenca del río Penco. Para ello se establecieron tres parcelas rectangulares de 20 x 25 m en distintos puntos de la zona de estudio, donde se midió presencia de amenazas, regeneración a partir de semilla, riqueza de especies y su proporción entre nativas y exóticas. Además, se midió diámetro a la altura de pecho y altura de lo individuos de C. mucronata encontrados en los recorridos por el área de estudio. Los resultados mostraron una baja abundancia de individuos maduros de la especie con gran concentración de individuos jóvenes, pero que constituyen tocones de árboles previamente cortados y en rebrote, con casi nula regeneración por germinación de semillas y una proporción que muestra mayor riqueza de especies nativas en las tres parcelas medidas. Las principales amenazas identificadas fueron la presencia de tocones de árboles cortados fue la más presente. Se concluye que, debido al estado degradado de la población de C. mucronata y su hábitat en la comuna, es necesario realizar esfuerzos de restauración para la especie con el fin de preservar y asegurar la supervivencia de su población en el tiempo.
The native forest in the locality of Penco has been severely affected due to landscape transformation caused by forest expansion, which covers approximately 75% of the territory's surface. Currently, there remains a small remnant of approximately 251 hectares distributed in small patches, where only one of them exceeds 10 hectares in extension. This has led to a reduction in the population of threatened endemic species, including Citronella mucronata. This study aimed to establish a baseline for the restoration of the species' habitat within the area of the Penco River basin. To achieve this, three rectangular plots of 20 by 25 m were established at different points in the study area, where threats presence, regeneration from seeds, species richness, and their proportion between native and exotic were measured. Additionally, the diameter at breast height and height of C. mucronata individuals found during the area's surveys were measured. The results showed a low abundance of mature individuals of the species with a high concentration of young individuals, which constitute stumps of previously cut trees and regrowth, with almost no regeneration by seed germination, and a proportion showing greater richness of native species in the three measured plots. The main identified threats were the presence of stumps of cut trees, which was the most prevalent. It is concluded that, due to the degraded state of the population of C. mucronata and its habitat in the commune, restoration efforts for the species are necessary to preserve and ensure the survival of its population over time.
The native forest in the locality of Penco has been severely affected due to landscape transformation caused by forest expansion, which covers approximately 75% of the territory's surface. Currently, there remains a small remnant of approximately 251 hectares distributed in small patches, where only one of them exceeds 10 hectares in extension. This has led to a reduction in the population of threatened endemic species, including Citronella mucronata. This study aimed to establish a baseline for the restoration of the species' habitat within the area of the Penco River basin. To achieve this, three rectangular plots of 20 by 25 m were established at different points in the study area, where threats presence, regeneration from seeds, species richness, and their proportion between native and exotic were measured. Additionally, the diameter at breast height and height of C. mucronata individuals found during the area's surveys were measured. The results showed a low abundance of mature individuals of the species with a high concentration of young individuals, which constitute stumps of previously cut trees and regrowth, with almost no regeneration by seed germination, and a proportion showing greater richness of native species in the three measured plots. The main identified threats were the presence of stumps of cut trees, which was the most prevalent. It is concluded that, due to the degraded state of the population of C. mucronata and its habitat in the commune, restoration efforts for the species are necessary to preserve and ensure the survival of its population over time.
Description
Tesis presentada para optar al título profesional de Ingeniero en Conservación de Recursos Naturales
Keywords
Plantas endémicas, Gestión ambiental Chile, Comuna de Penco (Concepción Chile)