Hikkaduwa National Park | |
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Location | Southern province, Sri Lanka |
Nearest city | Hikkaduwa |
Coordinates | 6°08′42″N80°05′33″E / 6.14500°N 80.09250°E Coordinates: 6°08′42″N80°05′33″E / 6.14500°N 80.09250°E |
Area | 101.6 ha |
Established | September 19, 2002 |
Governing body | Department of Wildlife Conservation |
Hikkaduwa National Park is one of the three marine national parks in Sri Lanka. The national park contains a fringing coral reef of high degree of biodiversity. The area was declared a wildlife sanctuary on May 18, 1979, and then on August 14, 1988, upgraded to a nature reserve with extended land area. [1] The growth of the number of visitors in the next 25 years increased the degradation of the coral reef. To reduce the effects to the ecosystem, the reef was declared a national park on September 19, 2002.
Hikkaduwa coral reef is a typical shallow fringing reef with an average depth of around 5 metres (16 ft). [2] The coral reef reduces the coastal erosion and forms a natural breakwater. [1] The coast of the national park extends four km. Generally the coast is narrow, ranging from 5–50 m according to the climatic conditions of the year. Scuba diving is a popular recreation here.
The national park situated in the wet zone and receives a 2,000 millimetres (79 in) of annual rainfall. [2] The rain is received in both southwestern and northeastern monsoon seasons, from April to June and September to November respectively. [1] Inter-monsoon season is a dry period which is considered the best season to visit the park. The temperature of the water ranges from 28.0°-30.0 °C while the mean annual temperature is 27 °C of the atmosphere.
Foliaceous Montipora species dominate the coral reef. [2] Encrusting and branching species are also present. Faviidae and Poritidae corals are contained in the inshore areas of the reef in massive colonies. Staghorn, elkhorn, cabbage, brain, table and star corals are all present in the reef. [1] [3] Corals of 60 species belonging to 31 genera are recorded from the reef. The reef also recorded over 170 species of reef fish belonging to 76 genera.
Seagrass and marine algae belonging to genera Halimeda and Caulerpa are common in the seabed depth ranging from 5–10 m. [1] Seagrasses provide habitat to dugongs and sea turtles. Some species of prawns feed on the seagrass. Eight species of ornamental fishes also inhabit the reef, along with many vertebrates and invertebrates including crabs, prawns, shrimps, oysters and sea worms. Porites desilveri is an endemic coral species of Sri Lanka. [2] Chlorurus rhakoura and Pomacentrus proteus are two reef fish species confined to Sri Lanka. Blacktip reef shark are found along the outer slope of the reef. Three sea turtles which have been categorized threatened visit the coral reef: the hawksbill turtle, green turtle, and olive ridley. [2]
The reef has suffered high degradation due to both natural and human activities. The live coral cover was decreased from 47 percent to 13 percent in a coral bleaching event in 1998, [2] induced by the 1998 El Niño. [4] It has been suggested that at least 30-40 percent of coral reef should be restored in order for it to be capable of sustaining itself. Despite being designated as a protected area, the coral reef has been subject to constant exploitation including removal of breeding ornamental fish for the commercial market. [5]
The two marine national parks of Sri Lanka, Hikkaduwa and Pigeon Island, received little direct impact from the Boxing day tsunami. [6] However they suffered from secondary impacts, particularly from terrestrial debris being deposited on the reefs. [7] A collaboration work of conservation groups and volunteers was carried out to clean up the beach and the reef debris, including two large fishing nets stuck on the outer edge of the reef.
The Andaman Sea is a marginal sea of the northeastern Indian Ocean bounded by the coastlines of Myanmar and Thailand along the Gulf of Martaban and west side of the Malay Peninsula, and separated from the Bay of Bengal to its west by the Andaman Islands and the Nicobar Islands. Its southern end is at Breueh Island just north of Sumatra, with the Strait of Malacca further southeast.
The Florida Keys National Marine Sanctuary is a U.S. National Marine Sanctuary in the Florida Keys. It includes the Florida Reef, the only barrier coral reef in North America and the third-largest coral barrier reef in the world. It also has extensive mangrove forest and seagrass fields. The Florida Keys National Marine Sanctuary, designated in 1990, is the ninth national marine sanctuary to be established in a system that comprises 13 sanctuaries and two marine national monuments. The Florida Keys National Marine Sanctuary protects approximately 2,900 square nautical miles of coastal and ocean waters from the estuarine waters of south Florida along the Florida Keys archipelago, encompassing more than 1,700 islands, out to the Dry Tortugas National Park, reaching into the Atlantic Ocean, Florida Bay and the Gulf of Mexico.
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The Gulf of Mannar Marine National Park is a protected area of India consisting of 21 small islands (islets) and adjacent coral reefs in the Gulf of Mannar in the Indian Ocean. It lies 1 to 10 km away from the east coast of Tamil Nadu, India for 160 km between Thoothukudi (Tuticorin) and Dhanushkodi. It is the core area of the Gulf of Mannar Biosphere Reserve which includes a 10 km buffer zone around the park, including the populated coastal area. The park has a high diversity of plants and animals in its marine, intertidal and near shore habitats. Public access inside the park is limited to glass-bottom boat rides. It was established as a National Park in 1986.
The staghorn coral is a branching, stony coral with cylindrical branches ranging from a few centimetres to over two metres in length and height. It occurs in back reef and fore reef environments from 0 to 30 m depth. The upper limit is defined by wave forces, and the lower limit is controlled by suspended sediments and light availability. Fore reef zones at intermediate depths 5–25 m (16–82 ft) were formerly dominated by extensive single-species stands of staghorn coral until the mid-1980s. This coral exhibits the fastest growth of all known western Atlantic fringe corals, with branches increasing in length by 10–20 cm (3.9–7.9 in) per year. This has been one of the three most important Caribbean corals in terms of its contribution to reef growth and fishery habitat.
Hol Chan Marine Reserve is a marine reserve close to Ambergris Caye and Caye Caulker, off the coast of Belize. It covers approximately 18 km² (4,448 acres) of coral reefs, seagrass beds, and mangrove forest. Hol Chan is Mayan for "little channel".
Elkhorn coral is an important reef-building coral in the Caribbean. The species has a complex structure with many branches which resemble that of elk antlers; hence, the common name. The branching structure creates habitat and shelter for many other reef species. Elkhorn coral is known to grow quickly with an average growth rate of 5 to 10 cm per year. They can reproduce both sexually and asexually, though asexual reproduction is much more common and occurs through a process called fragmentation.
Kadmat Island, also known as Cardamom Island, is a coral island belonging to the Amindivi subgroup of islands of the Lakshadweep archipelago in India. Measuring 9.3 kilometres (5.8 mi) in length, the island has a lagoon with a width of 1.5 kilometres (0.93 mi) covering an area of 25 square kilometres (9.7 sq mi). The ecological feature of the island is of coral reef with seagrass, and marine turtles which nestle here. The Ministry of Environment and Forests (India) has notified the island as a marine protected area for ensuring conservation of the island's animal, plant, or other type of organism, and other resources.
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Lunugamvehera National Park in Sri Lanka was declared in 1995, with the intention of protecting the catchment area of the Lunugamvehera reservoir and wildlife of the area. The national park is an important habitat for water birds and elephants. The catchment area is vital to maintain the water levels of the five tanks in the down stream of Kirindi Oya and wetland characteristics of Bundala National Park. This national park also serves as a corridor for elephants to migrate between Yala National Park and Udawalawe National Park. The national park is situated 261 km (162 mi) southwest from Colombo. After being closed because of the Sri Lankan civil war, the national park is now open to the general public.
Lahugala Kitulana National Park is one of the smallest national parks in Sri Lanka. Despite its land area, the park is an important habitat for Sri Lankan elephant and endemic birds of Sri Lanka. The national park contains the reservoirs of Lahugala, Kitulana and Sengamuwa and they are ultimately empties to Heda Oya river. Originally it was designated as a wildlife sanctuary on July 1 of 1966. Then the protected area was upgraded to a national park on October 31 of 1980. Lahugala Kitulana is situated 318 km east of Colombo.
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