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Biodiversity and Conservation 11: 16631680, 2002. 2002 Kluwer Academic Publishers. Printed in the Netherlands.
 

Summary: Biodiversity and Conservation 11: 1663­1680, 2002.
2002 Kluwer Academic Publishers. Printed in the Netherlands.
Herbivory in a fragmented tropical forest: patterns
´from islands at Lago Gatun, Panama
1, 2
*A. ELIZABETH ARNOLD and NIGEL M. ASQUITH
1
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA;
2 *Department of Zoology, Duke University, Durham, NC 27708, USA; Author for correspondence
(e-mail: betsya@email.arizona.edu; fax: 11-520-621-9190)
Received 28 February 2001; accepted in revised form 15 October 2001
Key words: Barro Colorado Island, Forest fragments, Heisteria concinna, Herbivory, Islands, Lepidop-
tera, Ouratea lucens, Panama, Protium panamense, Protium tenuifolium
Abstract. By imposing density-dependent mortality upon their hosts, specialist insect herbivores are
thought to contribute to the maintenance of tree diversity in tropical forests. Forest fragmentation may
alter patterns of herbivory, however, which may have important implications for tree species diversity in
forest remnants. To explore effects of fragmentation on patterns of herbivory, we assessed folivory by
Lepidopteran larvae on saplings of four focal tree species on eight artificial, forested islands at Lago
´Gatun, Panama.We explored the importance of island area, distance to larger land, exposure to dry season
winds, tree species, and season in determining proportions of new leaves damaged by caterpillars, and

  

Source: Arnold, A. Elizabeth - School of Plant Sciences, University of Arizona

 

Collections: Biology and Medicine