Olango
| Olango | |
|---|---|
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| Waters | Lake Camotes , Strait of Cebu |
| Archipelago | Olango archipelago |
| Geographical location | 10 ° 16 ′ 0 ″ N , 124 ° 3 ′ 0 ″ E |
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| length | 6 km |
| width | 3 km |
| surface | 10.3 km² |
| Highest elevation | 9 m |
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Olango is a Philippine island and is located about five kilometers east of the island of Mactan and about 15 km from the city of Cebu City .
geography
The length of the island is about 6 kilometers (northeast-southwest), the width about 3 km. It extends between 10 ° 13 'and 10 ° 16' north latitude and between 124 ° 2 'and 124 ° 04' east longitude.
In the south-west, not far from the coast, there are small islands in front of it: Sulpa, Gilutongan , Nalusuan , Caohagan, Pangan-an and Camungi - they form an archipelago surrounded by large undersea coral banks . The island of Gilutongan is about 11 hectares in size and has 1,600 inhabitants, who mainly live from fishing. The island is the destination of diving tourists through the Gilutongan Marine Sanctuary.
A little further away are other islets: from Pandanon, Cabulan and Coamen in the north to Mocaboc and Bagumbanwa in the south, these belong to the Caubyan and Calituban reefs in the north of the island of Bohol. Like the island of Mactan, Olango is one of the waters of the Danajon reef system , the largest reef system in the Philippines, but this is relatively unknown.
The Olango Archipelago is bounded by the Camotes Sea in the north, the Strait of Cebu in the south, the Olango Canal in the east and the Hilutungan Canal in the west. The tidal range on the coast of Olango reaches an average height of 1 meter.
The total area of the main island is approximately 1030 hectares . The topographical characteristics of the island are described as flat land with a low slope, the highest point on the island is 9 meters above sea level and is located near the center of the island.
geology
Geologically, the subsoil of the island and the archipelago is based on limestone , which is assigned to the Carcar formation, was formed on the border between the Pliocene and Pleistocene and is therefore 3 to 2 million years old. The Olango Archipelago was created by tectonic forces that lifted the coral banks on the limestone massif above the sea surface. Alluvial sands can also be found on the coasts of the islands of the archipelago , which were created by weathering and erosion of the coral banks above the water surface, as well as by weathered and eroded mussels and crab shells .
Hydrology
There are no streams or rivers on the island of Olango , but there are freshwater-bearing groundwater layers on the island. These are formed by caves and interconnected porous limestone formations in which rainwater can penetrate and be stored. These groundwater reservoirs are replenished annually from June to December by the natural influx of rainwater.
Territory & Population
The Olango Archipelago belongs to the province of Cebu , but is divided in its administration. The islands of Olango, Camungi, Pangan-an, Caohagan, Sulpa and Caubian belong to the administrative unit of the city of Lapu-Lapu , the islands of Nalusuan and Gilutongan belong to the administrative unit of the Cordova municipality . Marine nature reserves have also been established around the islands of Nalusuan and Gilutongan since the late 1990s.
There are eight barangays with over 32,000 inhabitants on the island of Olango :
- Sabang
- Santa Rosa
- San Vicente
- Talima
- Tingo
- Tungasan
Olango Wildlife Sanctuary
On May 14, 1992, the Olango Wildlife Sanctuary , OWS for short , was set up according to the guidelines of the National Integrated Protected Areas System . On November 18, 1994, the OWS was the first protected area in the Philippines to be included in the list of the Ramsar Convention for the protection of internationally important wetlands.
It extends over an area of approx. 920 hectares and is bordered by the Barangay Sabang in the east, the Sitio Aguho in the north and the Sitios of Basdaku and Bascoral in the west. The nature reserve is located in the southern part of the island of Olango. The surface structure of the protected area is formed by flat sand dunes , flat limestone areas and seagrass beds combined with mangrove forests .
A total of 97 different species of birds were observed in the OWS , including 42 native and 48 migratory bird species , which use the OWS as a resting place on their migration from Siberia, Japan and China to Indonesia and Australia.
In Barangay San Vicente, the Department of Environment and Natural Resources founded an information center that provides information about the Olango Wildlife Sanctuary.
Flora of the islands
The flora of the archipelago is dominated by various types of mangroves , such as the Bakhaw , the Pagatpat (Sonneratia caseolaris) and the Gapas-Gapas (Camptostemon philippinense) . There are some plantations of the coconut palm (Cocos nucifera) in the north of the island of Olango . The Ipil-Ipil tree, (Leucaena leucocephala) , the Kamotingkahoy (Manihot esculentum) , the Kanding-kanding (Lantana camara) , the Tugas (Vitex parviflora) , the Bayabas (Psidium guajava) , the Bantigue (Pemphis acidula) also grows. , the Madre de cacao (Gliricidia sepium) and some other plants.
Flora and fauna of the maritime areas
The maritime areas of the archipelago comprise a total of 2,243 hectares of coral reefs , in which 103 types of reef-forming corals , 4 non-reef-forming and 4 soft coral species have been counted. In most areas, the coral banks have an incline of 40 to 50 degrees. The coral banks around the island of Pangan-an have the highest biodiversity of corals in the Olango Archipelago. In 1991, the Gilutongan Marine Sanctuary was set up off the island of Gilutongan on an area of initially 11 hectares, later expanded to 15 hectares, at the instigation of the Cordova municipality .
In the shallow water areas of the coastal areas, extensive seagrass beds extend over an area of 1,756 hectares, which are in front of the coral banks. A total of 8 of the 16 species of seaweed found in the Philippines are found here. Furthermore, there are 28 types of red algae, 27 types of green algae and 17 types of brown algae.
There is a diverse life around the coral and seagrass beds, a total of 33 types of molluscs, 19 types of echinoderms, 5 types of sponges, 4 types of crustaceans and 2 types of cnidarians were counted.
A total of 144 species of fish from 24 different families were found on the coasts. Thus puffers (Tetraodontidae), lizard fish (Synodontidae), pipefish (Syngnathidae), rabbit fish (Siganidae), groupers (Serranidae), scorpion fish (Scorpaenidae), parrot fish (Scaridae), damselfish (Pomacentridae), sand perch (Pinguipedidae), angelfish (Pomacanthidae ), sham snapper (Nemipteridae), mullet (Mullidae), snapper (Lutjanidae) lethrinidae (Lethrinidae), wrasse (Labridae) holocentridae (Holocentridae) Soapfish (Grammistidae) Hawkfish (Cirrhitidae), butterfly fish (Chaetodontidae) blennies (Blenniidae), triggerfish (Balistidae), jewelry box fish (aracanidae), cardinal fish (Apogonidae) and surgeonfish (Acanthuridae) in the marine areas of the archipelago Olango be observed.
See also
swell
- Vulnerability assessment of Olango Island to predicted climate change and sea level rise. (PDF; 3.8 MB)
- Physical and Oceanographic Features. (PDF; 424 kB)
- Coastal Environmental Profile of Olango Island, Cebu, Philippines. (PDF; 137 kB)
- NATURAL RESOURCES of Olango (PDF; 418 kB)
Individual evidence
- ↑ http://www.cebucruising.com/cebu-nalusuan-island-mactan.html
- ↑ http://www.cebucruising.com/cebu-hilutungan-island-mactan.html
- ↑ http://www.cebucruising.com/mactan-cebu-map-dive-spots-information.html
- ↑ http://www.cebucruising.com/cebu-pandanon-island-mactan.html
- ↑ http://www.cebucruising.com/cebu-cabulan-island-mactan.html
- ↑ http://www.cebucruising.com/cebu-bagumbanwa-island-mactan.html
- ↑ Protected areas of Region 7 on the PAWB website ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
