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      Monitoreo a corto y largo plazo en ensayos de restauración de la conífera longeva y de lento crecimiento Pilgerodendron uviferum Translated title: Short-term and long-term monitoring in restoration trials of the long-lived and slow-growing conifer Pilgerodendron uviferum

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          Abstract

          RESUMEN: El monitoreo a largo plazo es fundamental para comprender las respuestas a acciones de restauración en especies de lento crecimiento como la conífera nativa Pilgerodendron uviferum. Luego de incendios catastróficos, la mayoría de los árboles y semillas de esta especie fueron eliminados, restringiendo su recuperación natural. El objetivo de este estudio fue analizar las implicancias del monitoreo a corto y largo plazo en la interpretación de resultados en ensayos de restauración pasiva y activa de Pilgerodendron uviferum, posterior a incendios en la Isla de Chiloé. Durante 10 años se evaluó la producción de semillas, el reclutamiento natural, y la regeneración asistida mediante plantaciones de P. uviferum bajo diferentes condiciones de micrositio en bosque turbosos y luminosidad en bosque de mejor drenaje. La producción de semillas de P. uviferum fue irregular y abundante cada siete años (⁓200 semillas m-2). La regeneración natural luego de ocho años aumentó en un 80 %, principalmente en sustratos cubiertos con musgos y en asociación con Donatia fascicularis y Astelia pumilia. La abundancia de regeneración natural estuvo positivamente asociada a árboles semilleros de mayor edad, la altura y diámetro de las plantas fue favorecida por la protección arbustiva. En sitios turbosos, la plantación en camellones alcanzó mayores tasas de sobrevivencia (78 %) y en sitios con mejor drenaje, fue mayor bajo protección de dosel superior (100 %). Los resultados sugieren que especies de lento crecimiento como P. uviferum requieren de periodos prologados de monitoreo para interpretar adecuadamente los resultados de ensayos de restauración en bosques quemados.

          Translated abstract

          SUMMARY: Long-term monitoring is essential to understand responses to restoration actions in slow-growing species such as the native conifer Pilgerodendron uviferum. After catastrophic fires, most trees and seeds of this conifer were eliminated, limiting its natural recovery. The objective of this study was to analyze the implications of short-term and long-term monitoring on the interpretation of results in passive and active restoration experiments with Pilgerodendron uviferum in Chiloé Island. For 10 years, the processes of seed production and natural plant recruitment, and assisted regeneration through plantations of P. uviferum were evaluated in different microsite conditions in bogs, and light availability in sites with better drainage. The production of P. uviferum seeds was irregular and abundant every seven years (⁓200 seeds m-2). The natural regeneration after eight years increased by 80 %, especially in substrates with mosses and in association with Donatia fascicularis and Astelia pumilia. The abundance of natural regeneration was positively associated with older trees, the height and diameter of plants was favored by the protection of shrubs. In bogs, plants established on mounds reached higher levels of survival (78 %) and in sites with better drainage, survival was higher under canopy protection (100 %). Our results suggests that slow-growing species, such as P. uviferum, require long periods of monitoring to adequately interpret the results of restoration experiments in burned forests.

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          Spatial patterns of seed dispersal, their determinants and consequences for recruitment.

          Growing interest in spatial ecology is promoting new approaches to the study of seed dispersal, one of the key processes determining the spatial structure of plant populations. Seed-dispersion patterns vary among plant species, populations and individuals, at different distances from parents, different microsites and different times. Recent field studies have made progress in elucidating the mechanisms behind these patterns and the implications of these patterns for recruitment success. Together with the development and refinement of mathematical models, this promises a deeper, more mechanistic understanding of dispersal processes and their consequences.
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                Author and article information

                Journal
                bosque
                Bosque (Valdivia)
                Bosque (Valdivia)
                Universidad Austral de Chile, Facultad de Ciencias Forestales (Valdivia, , Chile )
                0717-9200
                2021
                : 42
                : 2
                : 217-229
                Affiliations
                [2] orgnameUniversidad de Greifswald orgdiv1Facultad de Matemáticas y Ciencias Naturales orgdiv2Instituto de Botánica y Ecología del paisaje Alemania
                [1] Castro orgnameInstituto Forestal orgdiv1Oficina Chiloé Chile
                Article
                S0717-92002021000200217 S0717-9200(21)04200200217
                9b1aa8f5-814a-4402-8cb3-de24ee9609e6

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 14 December 2020
                : 20 June 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 51, Pages: 13
                Product

                SciELO Chile

                Categories
                ARTICULOS

                survival,ecological restoration,growth,Chiloé Island,ciprés de Las Guaitecas,early performance,sobrevivencia,restauración ecológica,crecimiento,Isla de Chiloé,desempeño inicial

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