Tubbataha Reef

Location: Sulu Sea Map

Area: 33,200 ha (128 sq mi)

Entrance Fee: $75

 

Description of Tubbataha Reef

Tubbataha Reef is a protected area and marine natural park within the Philippines, located in the central Sulu Sea. The marine and bird sanctuary consists of two large atolls (named North and South) and the smaller Jessie Beasley Reef and covers a total area of 7,030 hectares. It is located 150 km southeast of Puerto Princesa City, the provincial capital of Palawan. The uninhabited islands and reef are part of the island municipality of Cagayancilo, Palawan, located about 130 km northeast of the reef.

In December 1993, UNESCO included Tubbataha Reef Natural Park as a World Heritage Site as a unique example of atolls with very high densities of marine species; North Atoll is a nesting site for many species of birds and sea turtles. The park is an example of a pristine coral reef with a 100-meter perpendicular coral wall, an extensive lagoon and two coral islands. In 1999, the Ramsar Convention included Tubbataha Reef on its list of wetlands of international importance. In 2008, the reef was proposed to be named one of the seven "new" wonders of the world.

The national park and the southern Philippine archipelago are part of the Coral Triangle and are recognized as a center of marine biodiversity; it is home to 75% of the described coral species and 40% of the world's reef fish. The area is now under great threat due to overfishing and environmentally damaging fishing practices. Research by scientists visiting the reefs since 1980 has shown that Tubbataha Reef Nature Park is home to at least 600 species of fish, 360 species of coral, 11 species of sharks, 13 species of dolphins and whales and 100 species of birds. The reef is also a nesting site for hawksbill and green sea turtles.

 

Geography

The two atolls, located around six kilometers apart, together form the largest coral reef in the Philippines. They belong to the Mapun municipality. The name Tubbataha comes from the Samal. In its meaning it refers to a large reef that only rises out of the water at low tide. According to another interpretation, it means “resting place of the manta rays”. The reef is located in the middle of the Sulu Sea, about 160 km southeast of Puerto Princesa, the capital of Palawan.

On both atolls, the coral roof is between 100 and 300 m wide, is almost completely submerged under water at high tide and only forms a closed shape above the water when the tide is strong. At its center lie shallow, sandy lagoons that form an ideal habitat for stingrays and turtles. Towards the outside, coral walls fall in steps down to 1000 m, and after a few kilometers to over 2200 m.

Tubbatawa North Reef is 17.4 km long and up to 5.5 km wide. It has a total area of 80 km², and the lagoon is up to 24 meters deep, according to other sources up to 33 meters. The ring reef is closed and there is no boat entry into the lagoon. The atoll has two islands (North Islet and Central Islet), and some black boulders are constantly above water. The main island of North Islet (also Bird Island or Tubba Tawa Island), which is only a few thousand square meters in size and is 1.2 meters high at the northeastern end of the atoll, is covered in grass and guano. When the tide is low, some sand banks appear, each around 90 meters long.

Tubbataha South Reef is around 8.0 km long and up to 5.5 km wide. At its southern tip lies the 1.6 meter high South Islet, with an old lighthouse still in operation, whose extremely dim light is unsuitable for navigation. In addition, Black Rock and other black rocks and sand cays in the north of the atoll are constantly above water.

Jessie Beazley Reef is located 24.5 kilometers northwest of North Islet.

 

Geology

The 500 km long and 30 km wide Cagayan de Sulu Ridge divides the Sulu Sea into the northwest and southeast basins and connects the reef islands of Cagayan, with the neighboring islands of Arena and Cawili as well as Tubbataha and Cagayan de Sulu northeast of Borneo.

The atolls of Tubbataha were probably formed by a collapsed caldera (underground magma chamber), on the edges of which a limestone roof, now almost 100 m high, was formed by the tiny coral polyps over the course of thousands of generations and created the first escarpment. This hypothesis is supported by the Sulu Trench, which runs just south of the archipelago and adjoins the Negros Trench to the east - the Manila Trench continues to the north. Volcanic activity could have occurred specifically on these faults due to plate tectonics and subduction.

 

Marine National Park

Philippine President Corazon Aquino declared the reef and surrounding area to be Tubbataha Reef National Marine Park on August 11, 1988. This meant that commercial fishing and the collection of corals were banned, although this was implemented only slowly and then almost completely and across the board in February 2000 with the establishment of a permanent ranger station on a southern sandbank in the northern atoll. In 1993 the national park was declared a World Heritage Site by UNESCO. The area protected so far extends from 8°44' - 8°57' North and 119°48' - 120°03'. At the beginning of 2005, the northwestern Jessie Beazley Reef with a diameter of 500 m and a sandbar 10 m long and 1 m high at high tide was incorporated. After fishing and anchoring were previously permitted, the protected area was reclassified on August 23, 2010 according to the guidelines of Republic Act 7586, in coordination with UNESCO, and has since been designated as Tubbataha Reef Natural Park and declared a no-take zone. Tubbataha Reefs Natural Park is among six protected areas in the Philippines that have been designated as Ramsar sites.

7% of the entrance fees go directly to the budget of the greater municipality of Cagayancillo in the Cagayan Islands, as the Tubbataha Atoll is administered by it. There are also excellent diving areas in the Cagayan archipelago.

 

Flora and fauna

In the 970.30 km² marine nature park there are coral banks over an area of around 100 km². This makes it the third largest contiguous reef system in the Philippines, which is (again) largely intact due to its remote location and is ranked among the 10 most beautiful in the world in diving magazine hit lists. The French diving pioneer Jacques-Yves Cousteau was the only one to visit this reef twice.

However, it is not a pristine, intact reef. Especially in the mid to late 1980s, poaching using cyanide and dynamite and all other illegal and legal fishing methods took place on a large scale; not only, but also from foreign cutters, most of which came from the People's Republic of China, Vietnam and Korea. There is also damage caused by trawl nets, lines and anchors. The consequences are still obvious today, even though large areas of coral rubble are now well overgrown. The walls, especially in the deeper regions, hardly suffered. Approximately 500 different species of fish can be observed in the waters of the reef, such as the whitetip reef shark, rare blacktip reef sharks, gray reef sharks, eight species of marine mammals (including dolphins), large tuna and mackerel, groupers, Napoleon wrasse, ornamental Crawfish, large stingrays are rarer but not unusual. Nesting nests of green and hawksbill turtles can be found on the islands of the reef. Rare guests, but the chance is definitely there, are manta rays and whale sharks. In addition, there are around 374 species of soft and hard corals, seagrass meadows and an unmanageable amount of microorganisms. The huge fans of countless gorgonians attract attention in places, and many soft corals indicate the good water quality.

Scientifically, 20 to 30 metric tons of biomass per square nautical mile is considered a general indicator of good reef health. According to a survey, Tubbataha has 87.2 t, while Puerto Galera / northeastern Mindoro is far behind in second place in the Philippines with 26.24 t.

The inventory list is completed by 44 species of birds, many of which nest on the island in the northern atoll, which is only 300-500 m wide and has sparse vegetation; There is an absolute ban on entry here. The area is mainly inhabited by terns (white-capped noddi, Anous minutus; noddi, Anous stolidus; sooty tern, Onychoprion fuscatus; common tern, Thalasseus bergii) and brown boobies (Sula leucogaster). Occasional visitors include albatrosses and ariel frigatebirds (Fregatta ariel).

 

Diving

The underwater landscape with its diversity of species attracts many recreational divers due to its excellent condition - due to the great distance from fishing areas. Although the reef can only be visited from mid-March to mid-June and takes many hours to travel by boat from Cebu City, Manila or Puerto Princesa, its appeal to divers is increasing. Nevertheless, the atolls only reach fewer than a thousand people per year. Depending on the conditions, the visibility under water is 15 to 40 m and on some days - especially in May - up to 45 m. Both atolls (the larger north atoll and the south atoll) as well as the Jessie Beazley Reef, which is about 22 km northeast of the archipelago, can be dived become.

Extreme vertical and horizontal currents that are life-threatening for inexperienced divers can suddenly occur in the Tubbataha Atolls (“washing machine”).

 

Incidents

On January 17, 2013, the USS Guardian, a US Navy minehunter, ran aground in the marine conservation park, destroying approximately 1,000 m² of coral reef.