Heavier bird species may be vulnerable because they
need more food, have lower reproductive rates, and have
larger area requirements (Sodhi et al. 2004b). Nevertheless,
dietary specialization, exposed nest type, ground
nesting, or disturbed habitat use was not as important
in affecting species vulnerability on Bintan. Extinction
proneness often has an evolutionary component because
many species share the same ancestor and so have similar
life-history traits by descent (Bennett & Owens 1997).
The classification-tree approach, however, does not need
to explicitly account for phylogenetic relatedness because
it does not require species data to be independent,
unlike multiple regression analysis (Westoby et al. 1995).
Our results suggest that the remaining forests on Southeast
Asian islands should be preserved to ensure survival
of the residual avifauna. On the islands we studied, and
in smaller Southeast Asian parks, reforestation of deforested
lands may be necessary to increase forest cover and
thereby increase bird populations. Reforestation may also
set the stage for eventual reintroduction of or recolonization
by extirpated species. Of course, all such conservation
measures would require cooperation of local people
and, therefore, careful consideration of socioeconomic
factors (Sodhi et al. 2006c).
Heavier bird species may be vulnerable because they
need more food, have lower reproductive rates, and have
larger area requirements (Sodhi et al. 2004b). Nevertheless,
dietary specialization, exposed nest type, ground
nesting, or disturbed habitat use was not as important
in affecting species vulnerability on Bintan. Extinction
proneness often has an evolutionary component because
many species share the same ancestor and so have similar
life-history traits by descent (Bennett & Owens 1997).
The classification-tree approach, however, does not need
to explicitly account for phylogenetic relatedness because
it does not require species data to be independent,
unlike multiple regression analysis (Westoby et al. 1995).
Our results suggest that the remaining forests on Southeast
Asian islands should be preserved to ensure survival
of the residual avifauna. On the islands we studied, and
in smaller Southeast Asian parks, reforestation of deforested
lands may be necessary to increase forest cover and
thereby increase bird populations. Reforestation may also
set the stage for eventual reintroduction of or recolonization
by extirpated species. Of course, all such conservation
measures would require cooperation of local people
and, therefore, careful consideration of socioeconomic
factors (Sodhi et al. 2006c).
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