Biodiversity Indexing at HOLCIM Philippines Limestone Quarrying Site in Budbud, Bunawan District, Davao City

Abstract

Quarry sites are actively rehabilitated to bring back that is almost similar, if not identical, to pre-quarry operations. The inventory assesses the rehabilitation effort conducted at the Quarry area of HOLCIM Philippines in Budbud, Bunawan District, Davao City. The study area consists of four separate small patches. Sampling stations for each group were randomly chosen and almost always situated with the boundaries, towards the interior or inside the patches. Two part surveys were simultaneously done on the site: vegetation analysis and faunal inventories. This survey accounts for a total of 22 species of birds representing 16 families (all residents), 4 bat species under one family, 5 frogs in 5 different families, 5 lizards in 3 families, and 1 snake species. In terms of endemic species, two are recorded for birds: Dicaeum austrade and Phapitretron leucotis, one for bats - Ptenochirus jagori, and one endemic lizard: Draco bimaculaus. In terms of vegetation, a number of non-endemic species are abundant in the site and cover is dominated by grasses like cogon, and basket grass. Tree species were mostly of non-native species as exemplified by the presence of Gmelinina (locally called Gemelina) and Swittenia (locally called Mahogany). A few native species were present: Artocarpuz locally called Kamansi and Molave type (Family Verbenaceae, Vitex sp.) with reduced frequency and quite interspersed distribution. Majority of the species accounted are known inhabitants of disturbed wildlife habitats.