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Journal of Tropical Ecology (2000) 16:447464. With 6 figures Copyright 2000 Cambridge University Press
 

Summary: Journal of Tropical Ecology (2000) 16:447464. With 6 figures
Copyright 2000 Cambridge University Press
Effect of plant density and light availability on
leaf damage in Manilkara bidentata (Sapotaceae)
PILAR ANGULO-SANDOVAL and T. MITCHELL AIDE
PO Box 23360, Department of Biology, University of Puerto Rico, San Juan, Puerto Rico
00931-3360
(Accepted 27th December 1999)
ABSTRACT. Variation in herbivory is often associated with plant density and light
environment. The effect of these variables was studied on leaf production and
herbivory of Manilkara bidentata in Puerto Rico. The major herbivore of M. bidentata
is the leaf miner Acrocercops sp. To determine the effect of plant density, twenty-
four 20-m 20-m plots were established and the densities of saplings, juveniles and
adults were determined. Leaf production, herbivory and growth were measured on
saplings. Plant density was determined in eight 20-m 20-m plots surrounding
the focal plots. The effect of light was determined by comparing leaf phenology,
leaf quality and herbivory in vertical and horizontal profiles. Sapling density in
60-m 60-m plots was associated with herbivory. In the vertical profile, leaf pro-
duction was continuous only for the canopy: herbivory increased from the canopy
(1.3%) towards the understorey (35.6%). In the horizontal profile leaf production

  

Source: Aide, Mitchell - Department of Biology, Universidad de Puerto Rico - Rio Piedras

 

Collections: Environmental Sciences and Ecology