. The birds of Mt. Isarog National Park, Southern Luzon, Philippines, with particular reference to altitudinal distribution. Birds. Fig. 3. Partially cleared lowland forest at 900 m. Note 12-m mist net in foreground. The view in the upper right comer is northwest, towards San Miguel Bay. (Photo taken late March 1988 by S. M. Goodman.) stopped because of a change in topography and habitat (see below). The remaining lowland forest had the charac- teristic three-storied structure associated with this ecological zone. The tallest trees were estimated to be 30—45 m and in undisturbed areas they clo
. The birds of Mt. Isarog National Park, Southern Luzon, Philippines, with particular reference to altitudinal distribution. Birds. Fig. 3. Partially cleared lowland forest at 900 m. Note 12-m mist net in foreground. The view in the upper right comer is northwest, towards San Miguel Bay. (Photo taken late March 1988 by S. M. Goodman.) stopped because of a change in topography and habitat (see below). The remaining lowland forest had the charac- teristic three-storied structure associated with this ecological zone. The tallest trees were estimated to be 30—45 m and in undisturbed areas they closed off the canopy. Approximately 40% of the large trees had buttressed bases. In selectively logged areas of the forest it is these giants that are sought after and removed. Strangler figs were relatively common in both undisturbed and secondary low- land forest. During March 1988 several types of Ficus spp. trees and shrubs were in flower and fruit. The lower tiers of the intact lowland forest con- sisted mostly of young trees and lianas. Epiphytes were common and groimd ferns and succulent herbs rare. In most areas, rattan, a type of climbing spiny palm (Calamus) used in commercial construction, had been widely harvested from the forest by local people. The Panicuason Central Nursery is the local headquarters of the Philippine Bureau of Forest Development reforestation project on Mt. Isarog. The main focus of this program is the replanting of trees in large tracts of cleared lowland forest between about 350 and 600 m. This is primarily for watershed management and to a lesser extent for selective logging. The oldest replanted stands of forest on the west side of Mt. Isarog are about 20 years old. In virtually all replanted groves only one or two species of trees have been introduced, including Philippine mahogany (I ) and non- native ipil-ipil (Leucaena). One edge of the nursery lies along the national park boundary. Other hab- itats near the Panicuason Central Nurser
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Keywords: ., bookauthorfieldmuseumofnatura, bookcentury1900, booksubjectbirds
