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Replication data for: Tree shape plasticity in relation to crown exposure

World Agroforestry - Research Data Repository Dataverse OAI Archive

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Title Replication data for: Tree shape plasticity in relation to crown exposure
 
Identifier https://doi.org/10.34725/DVN/RWXYEL
 
Creator Harja, Degi
 
Publisher World Agroforestry - Research Data Repository
 
Description Trees outside closed forest stands differ in the relation between stem diameter, height and crown volume from trees that grew with neighbours close by. Whether this plasticity in tree shape varies between species in relation to their light requirement is unknown. We purposefully sampled 528 trees ranging 5–100
 cm diameter at breast height growing in a range of light conditions. Across ten broad-leaved species observed in Sumatra or Kalimantan, a generic relationship was found between light exposure of the crown and a light-dependent a l parameter that modifies the height–diameter allometric equation (H = a l D b ) from those for closed stands. In our results, vertical stretching is well predicted by light availability. In fully open conditions, trees are on average 31% shorter for the same diameter than under (partial) shade. Most of the stretching response occur
s in all species as soon as some degree of lateral shading occurs. The response, however, varies by species (8–44% reduction) in a way apparently unrelated to species’ successional status. Crown volume varied less than stem height in its relationship with stem diameter across all light conditions tested. The scaling of crown volume with stem diameter, however, differed markedly between tree species.
 
Subject Agricultural Sciences
Allometry
Tree height
Crown shape
Humid tropics
Wood density
 
Date 2005
 
Type Observation data