Publication
 

Inferred causes of tree mortality in fragmented and intact Amazonian forests

In fragmented tropical landscapes, among the most pervasive causes of ecological change are edge effects - diverse ecological alterations associated with the abrupt, artificial boundaries of forest fragments (Laurance & Bierregaard 1997, Lovejoy et al. 1986, Turner 1996). A striking edge effect in fragmented Amazonian forests is chronically elevated tree mortality (Ferreira & Laurance 1997, Laurance et al. 1998a). Large (>60 cm diameter) trees are especially vulnerable to fragmentation, dying three times faster within 300 m of edges than in forest interiors (Laurance et al. 2000). Elevated tree mortality alters canopy-gap dynamics, promotes a proliferation of disturbance-adapted successional species (Laurance et al. 1998b), reduces above-ground biomass (Laurance et al. 1997), and accelerates litter production (Didham & Lawton 1999, Sizer et al. 2000) and carbon cycling (Nascimento & Laurance, in press).

Authors: 
D'Angelo, Sammya A. Andrade, Ana C. Laurance, Susan G.W. Laurance, William F.
Journal: 
Journal of Tropical Ecology
Year: 
2004
Volume: 
20
Issue: 
2
Pages: 
243-246
Site: 
Manaus