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Stand dynamics of the shade-tolerant conifers Podocarpus nubigena and Saxegothaea conspicua in Chilean temperate rain forest
Article first published online: 24 FEB 2009
1996 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 7, Issue 4, pages 549–558, August 1996
How to Cite
Lusk, C. H. (1996), Stand dynamics of the shade-tolerant conifers Podocarpus nubigena and Saxegothaea conspicua in Chilean temperate rain forest. Journal of Vegetation Science, 7: 549–558. doi: 10.2307/3236304
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 10 June 1994; Revision received 29 November 1995; Accepted 11 January 1996.
- Productivity gradient;
- Shade tolerance;
- Southern temperate forest;
- Treefall gap
- Marticorena & Quezada (1985).
Abstract. Population structures were used to infer regeneration patterns of the conifers Podocarpus nubigena and Saxegothaea conspicua and associated angiosperm tree species in six stands in the temperate rainforests of the coastal ranges of southern Chile. On poorly-drained, nutrient-poor and high altitude sites, where most of the associated species were fairly shade-intolerant and light-crowned, dense all-aged populations and the presence of numerous saplings beneath the canopy suggested continuous regeneration of both P. nubigena and S. conspicua. On more favourable sites, where several of the associated angiosperms were highly shade-tolerant and densecrowned, both conifers, particularly P. nubigena, were less abundant, and their regeneration from seed appeared to be sporadic. S. conspicua's great longevity (≥ 750 yr) and frequent vegetative reproduction are probably crucial to its persistence in competition with shade-tolerant broadleaved species in undisturbed stands on favourable sites. Results of this study, and a review of related literature on southern temperate forests are not consistent with the hypothesis that heavily-shaded, infrequently-disturbed habitats are an evolutionary refuge for conifers. Sites likely to have high leaf area indices and infrequent disturbance are better exploited by shade-tolerant angiosperms.