Assessment of Mangroves Identified as Crocodylus porosus Habitat in Del Carmen Siargao Islands

Carlos H. Donoso


The study aimed to assess the species composition, abundance, distribution, as well as the zonation pattern of mangrove species identified as the nesting habitat of Crocodylus porusus. A total of three transect lines and 30 quadrats were used. The mangrove area had five true mangrove species belonging to 4 families; namely, Sonneratia alba, Avicennia marina, Rhizophora mucronata, Rhizophora apiculata and Ceriops tagal and one associate mangrove, Nypa fruticans. Sonneratia alba and Avicennia marina were the most abundant in the area, and were found in seaward zone. Rhizophora apiculata and Rhizophora mucronata were in the middle zone whereas Nypa fruticans and Ceriops tagal were found in landward zone. In terms of ecological status, the mangrove area of Del Carmen, Siargao Islands, Philippines can be rated as 3.0 using a rating scale of 1-no impact and 5.0- having impact. This means that the area was disturbed. The number of mangrove saplings and seedlings were quite low. Destructions of the habitat were observed. The cutting of trees and the use of the area as berthing site for boats is most observed in the mangrove area. Active community active participation on mangrove conservation and crocodile bio-physical monitoring should be strengthened for a sustainable management of their wetland resources.


assessment, Crocodylus porosus, habitat, mangroves

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