Flowering and seeding patterns in primary, secondary and silvopastoral managed Nothofagus antarctica forests in South Patagonia

The success ofthe reproductive process in trees depends on abiotic and biotic factors that determine the final outcome of natural regeneration. Silviculture alters biotic and abiotic factors and results in secondary forest structures. To effectively manage these forests, it is necessary to understan...

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Bibliographic Details
Published in:New Zealand Journal of Botany
Main Authors: Soler Esteban, Rosina Matilde, Martínez Pastur, Guillermo José, Lencinas, María Vanessa, Peri, Pablo Luis
Format: Article in Journal/Newspaper
Language:English
Published: Taylor & Francis 2010
Subjects:
Silviculture
Silvopastoral Systems
Foraging
Insecta
Seed Quality
Regeneration
Biotic Factors
Abiotic Factors
Primary Forests
Silvicultura
Sistemas Silvopascícolas
Búsqueda de Alimento
Calidad de la Semilla
Regeneración
Factores Bióticos
Factores Abióticos
Bosque Primario
Bird Consumption
Consumo de Aves
Región Patagónica
Antarc*
Antarctica
Tierra del Fuego
Online Access:https://hdl.handle.net/20.500.12123/12859
https://www.tandfonline.com/doi/full/10.1080/0028825X.2010.482959
https://doi.org/10.1080/0028825X.2010.482959
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Summary:The success ofthe reproductive process in trees depends on abiotic and biotic factors that determine the final outcome of natural regeneration. Silviculture alters biotic and abiotic factors and results in secondary forest structures. To effectively manage these forests, it is necessary to understand the bottlenecks in reproductive stages using a whole-cycle approach study. The aim ofthis study was to analyse flowering and seeding patterns in primary, secondary and silvopastoral managed Nothofagus antarctica forests, including investigating the pre-dispersion foraging of insects and birds, as well as abscised biomass production. A high percentage of female flowers produced fruits (95 96%) in which the main loss factor before seeding was the abscission ofimmature fruits (11 14%). Seeding was greater in secondary forests (11.4 million ha1), but managed stands presented a higher percentage offlowers resulting in seeds (82%). However, secondary forests had a better seed quality (17% viable seeds), where the main loss factor was empty seeds in all treatments (39 50%). Biotic factors (foraging by insects and birds) were higher in disturbed than primary forests. Nothofagus antarctica produce large quantities of seeds, but abscised immature fruits and empty seeds due to self-incompatibility mechanisms appeared as the major loss factors. EEA INTA Santa Cruz Fil: Soler Esteban, Rosina Matilde. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Centro Austral de Investigaciones Científicas (CADIC). Ushuaia, Tierra del Fuego; Argentina. Fil: Martínez Pastur, Guillermo José. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Centro Austral de Investigaciones Científicas (CADIC). Ushuaia, Tierra del Fuego; Argentina. Fil: Lencinas, María Vanessa. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Centro Austral de Investigaciones Científicas (CADIC). Ushuaia, Tierra del Fuego; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria ...

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