Disturbance and regeneration dynamics of an old-growth North Patagonian rain forest in Chiloe Island, Chile

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dc.contributor.authorGutiérrez, AG
dc.contributor.authorArmesto, JJ
dc.contributor.authorAravena, JC
dc.date.accessioned2025-01-21T01:07:47Z
dc.date.available2025-01-21T01:07:47Z
dc.date.issued2004
dc.description.abstract1 Few studies have addressed the mechanisms of coexistence of shade-tolerant and intolerant tree species in the canopy of old-growth, lowland rain forests of southern South America. We explored the hypothesis that their forest dynamics result from frequent, single tree-fall gap episodes.
dc.description.abstract2 We analysed the disturbance regime and assessed the regeneration modes of shade-tolerant and intolerant canopy trees in a lowland, old growth North Patagonian rain forest in Chiloe Island (42degrees S) using dendroecological methods.
dc.description.abstract3 Dominant canopy trees were the shade-intolerant Nothofagus nitida (Fagaceae), Drimys winteri (Winteraceae) and the tolerant Podocarpus nubigena (Podocarpaceae). The oldest individuals, however, were represented by Saxegothaea conspicua, Podocarpaceae (shade tolerant > 498 years) and Weinmannia trichosperma, Cunoniaceae (intolerant > 382 years). Shade-tolerant species have regenerated continuously for the past 400 years, but recruitment of shade-intolerant species has increased only in the past 50 years. These regeneration patterns suggest a lack of catastrophic disturbance, at least since 1650.
dc.description.abstract4 Analysis of tree radial growth patterns revealed frequent moderate releases of both shade-tolerant and intolerant tree species, consistent with frequent small-scale disturbances, such as individual tree-fall gaps. Increased releases, peaking in 1940 and followed by enhanced recruitment, may be a consequence of individual tree-falls induced by low-intensity windstorms or limited selective logging. Such disturbances have occurred for at least 250 years, but have had little overall effect on stand structure and canopy composition.
dc.description.abstract5 The replacement and coexistence of shade-tolerant and intolerant tree species in the canopy of this North Patagonian forest can be explained by frequent small-scale disturbances (i.e. gap-phase dynamics) and by the absence of large-scale natural or anthropogenic disturbances over the past four centuries.
dc.fuente.origenWOS
dc.identifier.eissn1365-2745
dc.identifier.issn0022-0477
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96381
dc.identifier.wosidWOS:000222869400005
dc.issue.numero4
dc.language.isoen
dc.pagina.final608
dc.pagina.inicio598
dc.revistaJournal of ecology
dc.rightsacceso restringido
dc.subjectdendroecology
dc.subjectdisturbance regimes
dc.subjectgap-phase dynamics
dc.subjectregeneration modes
dc.subjectshade-tolerance
dc.subjectspecies coexistence
dc.subjecttemperate rain forest
dc.subjecttree-fall gaps
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleDisturbance and regeneration dynamics of an old-growth North Patagonian rain forest in Chiloe Island, Chile
dc.typeartículo
dc.volumen92
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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