Coral community structure on tire reefs at Sitio Mapalad, Barangay Dalipuga, Iligan City (Philippines)
1998
Responte, J.A.
The community structures of coral on tire reefs in Mapalad, Dalipuga, Iligan City [Philippines] was evaluated from June 1996 to Jan 1997. The seven-month survey provided data on coral composition, distribution, abundance, diversity and some environmental parameters. A total of 12 coral families and 19 genera were observed in all the upright tire module deployed at depths between 8 to 27 m. Eleven genera were identified at 8 m, fourteen at 14 m, three at 24 m and six at 27 m depth. Intermediate depths (8 and 14 m) were associated with higher mean surface area of colonization (1,042 and 2,601 sq cm respectively) and percent coral coverage (1.6 and 3.98, respectively). Favia recorded the highest percent live coral cover at 8 m and Pocillopora at 24 and 27 m. Pocillopora recorded the highest percent cover among all scleractinian corals in all the four depth stations. Brillouin's index of total genus diversity (HSG) was high in modules at 8, 14, and 27 m (1.77, 1.86, and 1.34, respectively) while a low index was observed at 24 m depth (0.68). Results of Kruskall-Wallis oneway nonparametric analysis of variance indicated that there was no significant difference in the relative abundance, area of live coral colonies and percent cover of coral genera found at 8, 14, and 27 m at 0.05 level of significance. In comparison, 56 colonies were recorded from the five toppled modules with Favia constituting the highest number of colonies and Leptoseris exhibiting the highest percent cover. The temperature, salinity, pH, dissolved oxygen, turbidity, total suspended solids, inorganic phosphate, and nitrate showed minimal variations at the surface and bottom waters (8 and 24 m) and were within the ranged observed for Iligan Bay
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