Abstract
We examined the hypothesis that tropical rain forest tree species differ significantly in the degree to which their regeneration is associated with treefall gaps. Using static and dynamic analyses, we evaluated crown light environments and forest structure around 0.5-5 m tall saplings (N = 424) of two pioneer and seven nonpioneer tree species in old growth tropical wet forest at the La Selva Biological Station, Costa Rica. Canopy photographs were taken with a fisheye lens directly above all individuals. Each photograph was analyzed to calculate a Global Site Factor (GSF), which is analogous to the percentage of photosynthetically active radiation reaching a site relative to a totally open site (...)
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