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| Danajon Bank | |
|---|---|
| Name | Danajon Bank |
| Location | Bohol Sea / Camotes Sea, Philippines |
| Type | Double barrier reef |
| Coordinates | 10°00′N 124°00′E |
| Area | ~1,000 km² |
| Country | Philippines |
| Region | Central Visayas |
Danajon Bank Danajon Bank is a rare double barrier reef system in the Philippines, located between the islands of Bohol, Leyte, Cebu, and Siquijor. Recognized for its extensive coral structures and rich marine life, it has attracted attention from organizations such as UNESCO, the World Wide Fund for Nature, and the International Union for Conservation of Nature. The area has been the focus of studies by institutions including the University of the Philippines, Aklan State University, and the Silliman University Marine Laboratory.
The reef complex lies in the waters of the Bohol Sea and the Camotes Sea, adjacent to island groups like Bohol, Cebu, Leyte, and Siquijor. Geological descriptions reference carbonate deposition processes similar to formations studied at Great Barrier Reef and Florida Keys, with reef growth influenced by sea level changes noted since the Last Glacial Maximum. Tectonic context involves the Philippine Mobile Belt and proximate features such as the Negros Trench and Mindanao Fault. Oceanographic drivers include currents from the Kuroshio Current system and monsoon regimes like the Northeast Monsoon and Southwest Monsoon. Bathymetric surveys by teams from NOAA and the Philippine Institute of Volcanology and Seismology have mapped lagoons, reef flats, and surrounding shoals.
The bank supports coral taxa comparable to assemblages catalogued at Tubbataha Reefs Natural Park and Apo Reef Natural Park, including hard corals, soft corals, and associated invertebrates. Fish communities include reef taxa such as species recorded by researchers from Zoological Society of London and Wildlife Conservation Society surveys. Habitats comprise seagrass beds with genera studied at Silliman University and mangrove stands similar to those in Ilin Island. Key species and groups linked to the area in conservation literature include representatives cited by the IUCN Red List, with concerns for species also found in Tañon Strait and around Malapascua Island. Ecosystem services have been compared in reports by USAID, Conservation International, and the Asian Development Bank.
Coastal municipalities such as Bien Unido, Getafe, Tubigon, and Talibon have fishing communities whose practices echo traditional methods recorded in ethnographic studies from Visayas archipelagos. Local livelihoods depend on reef fisheries, aquaculture operations similar to projects in Palawan and Zambales, and small-scale tourism linked to sites like Panglao Island and Malapascua. Management institutions include local government units aligned with national agencies like the Department of Environment and Natural Resources and programs funded by entities such as the Asian Development Bank and USAID. Social science research by scholars at University of San Carlos and Cebu Normal University has examined resource tenure, customary practices, and stakeholder dynamics present in the region.
Protected area designations and community-based initiatives mirror efforts at Tubbataha Reefs Natural Park and Olango Island with involvement from NGOs like World Wide Fund for Nature, Conservation International, and Marine Conservation Philippines. Management strategies have included marine protected areas (MPAs) established by municipal councils, co-management schemes with the Bureau of Fisheries and Aquatic Resources, and livelihood diversification supported by Department of Agriculture programs. International collaborations have involved experts from James Cook University and the University of Bangor advising on reef restoration, gear restrictions, and monitoring frameworks inspired by guidelines from Convention on Biological Diversity and the Ramsar Convention.
Documented pressures include overfishing techniques such as methods listed in regional reports on destructive fishing also observed in Sulu Sea fisheries, habitat degradation from sedimentation linked to land use changes in watersheds of Bohol and Leyte, and coral bleaching events associated with El Niño–Southern Oscillation episodes reported by NOAA and PAGASA. Impacts mirror those studied in Coral Triangle hotspots and have prompted assessments by IUCN and WorldFish on fisheries decline, loss of biodiversity, and coastal erosion comparable to trends seen on Negros Island and Panay.
Scientific monitoring has been conducted by institutions such as University of the Philippines Marine Science Institute, Silliman University, and international partners including NOAA, James Cook University, and the Zoological Society of London. Studies have employed methods used in reef science at Apo Reef, including benthic surveys, fish biomass estimates, and genetic analyses comparable to projects at Tubbataha Reefs Natural Park. Data-sharing and capacity building have been supported by programs from USAID, Asian Development Bank, and regional networks connected to Coral Triangle Initiative frameworks.
Coastal communities around the bank have cultural ties reflected in oral histories from Boholanos, Cebuanos, and Waray peoples recorded by anthropologists at University of the Philippines and Silliman University. Maritime traditions connect to wider Philippine seafaring heritage such as practices documented in studies of Bangka and Balangay vessels. Historical events in adjacent waters include shipping routes near Cebu City and wartime operations in the Battle of Leyte Gulf, with colonial-era records in archives like those of the National Library of the Philippines and the National Museum of the Philippines noting long-term human use of reef resources.
Category:Reefs of the Philippines Category:Geography of Central Visayas