A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups.
Coral bleaching is the process when corals become white due to various stressors, such as changes in temperature, light, or nutrients. Bleaching occurs when coral polyps expel the zooxanthellae that live inside their tissue, causing the coral to turn white. The zooxanthellae are photosynthetic, and as the water temperature rises, they begin to produce reactive oxygen species. This is toxic to the coral, so the coral expels the zooxanthellae. Since the zooxanthellae produce the majority of coral colouration, the coral tissue becomes transparent, revealing the coral skeleton made of calcium carbonate. Most bleached corals appear bright white, but some are blue, yellow, or pink due to pigment proteins in the coral.
Southeast Asian coral reefs have the highest levels of biodiversity for the world's marine ecosystems. They serve many functions, such as forming the livelihood for subsistence fishermen and even function as jewelry and construction materials. Corals inhabit coastal waters off of every continent except Antarctica, with an abundance of reefs residing along Southeast Asian coastline in several countries including Indonesia, the Philippines, and Thailand. Coral reefs are developed by the carbonate-based skeletons of a variety of animals and algae. Slowly and overtime, the reefs build up to the surface in oceans. Coral reefs are found in shallow, warm salt water. The sunlight filters through clear water and allows microscopic organisms to live and reproduce. Coral reefs are actually composed of tiny, fragile animals known as coral polyps. Coral reefs are significantly important because of the biodiversity. Although the number of fish are decreasing, the remaining coral reefs contain more unique sea creatures. The variety of species living on a coral reef is greater than anywhere else in the world. An estimation of 70-90% of fish caught are dependent on coral reefs in Southeast Asia and reefs support over 25% of all known marine species. However, those sensitive coral reefs are facing detrimental effects on them due to variety of factors: overfishing, sedimentation and pollution, bleaching, and even tourist-related damage.
Blast fishing, fish bombing, dynamite fishing or grenade fishing is a destructive fishing practice using explosives to stun or kill schools of fish for easy collection. This often illegal practice is extremely destructive to the surrounding ecosystem, as the explosion often destroys the underlying habitat that supports the fish. The frequently improvised nature of the explosives used, and undetonated charges, means danger for fishermen and divers as well, with accidents and injuries.
The Dar es Salaam Marine Reserve System or DMRS is a group of marine reserves in Tanzania, with the IUCN category II located within Dar es Salaam Region of Tanzania. The reserve system consists of nine uninhabited islands, four located north of Dar es Salaam's Kinondoni District; and four south of the city Makatumbi Islands, Kimbubu Island, Sinda Island and Kendwa Island in Kigamboni District. It provides protection for several important tropical ecosystems; coral reefs, mangroves and seagrass beds.
Schultz's pipefish, Corythoichthys schultzi, is a pipefish of the family Syngnathidae.
Mafia Island Marine Park is a protected marine park with the IUCN category VI around the Mafia Archipelago in the Indian Ocean's sea of Zanj. It is administratively located in the jurisdiction Mafia District of Pwani Region in Tanzania.
Maziwi island officially, The Maziwe Island Marine Reserve is a unvegetated, protected island surrounded by coral reefs located about 8 kilometres (5.0 mi) south east of the town of Pangani off the northern coast of Tanga Region in Tanzania. The island is administered under Mwera ward of Pangani District. However, it is currently under the Tanga Marine Reserves System. It became a nature reserve in 1975. At one time the island was larger than its present area and was well-vegetated but with the loss of its coconut trees and scrub cover, it has suffered erosion and is now sometimes completely immersed at the time of the highest tides. Green sea turtles no longer nest on the island, but it is visited by numerous sea birds. The sea contains many species of coral and over two hundred species of fish. The reserve has received little active conservation work but management is now supported by levying a small fee on tourists which is used to compensate local fishermen for loss of income.
Human activities have substantial impact on coral reefs, contributing to their worldwide decline.[1] Damaging activities encompass coral mining, pollution, overfishing, blast fishing, as well as the excavation of canals and access points to islands and bays. Additional threats comprise disease, destructive fishing practices, and the warming of oceans.[2] Furthermore, the ocean's function as a carbon dioxide sink, alterations in the atmosphere, ultraviolet light, ocean acidification, viral infections, the repercussions of dust storms transporting agents to distant reefs, pollutants, and algal blooms represent some of the factors exerting influence on coral reefs. Importantly, the jeopardy faced by coral reefs extends far beyond coastal regions. The ramifications of climate change, notably global warming, induce an elevation in ocean temperatures that triggers coral bleaching—a potentially lethal phenomenon for coral ecosystems.
The Menai Bay Conservation Area (MBCA) is located in Menai Bay, Zanzibar Tanzania. At 470 square kilometres (180 sq mi), it is Zanzibar's largest marine protected area. It was officially established as a conservation area in August 1997 in the traditional fishing area, known as Unguja Island, covering the tropical marine environment comprising extensive coral reefs, tropical fish, sea grasses, and mangrove forests. In addition to controlling illegal fishing, MBCA's alternative initiatives have included bee keeping, mangrove replanting, tree nurseries and tourism. The management of the MBCA falls upon the Fisheries Department and the bay's local villages. It is rated by the IUCN as Category VI Managed Resource Protected Area.
Mnemba Island is a single small island located about 3 km off the northeast coast of Unguja, the largest island of the Zanzibar Archipelago, Tanzania, opposite Muyuni Beach. It is roughly triangular in shape, about 500 metres (1,640 ft) in diameter and about 1.5 kilometres (0.9 mi) in circumference. It is surrounded by an oval reef seven by four kilometres in extent. These reefs have been declared a marine conservation area. Mnemba Island and its reef are sometimes called Mnemba Atoll which is incorrect because an atoll is an island that encircles a lagoon, which is not the case for Mnemba Island.
Timothy R. McClanahan is a biologist and a senior conservation zoologist at the Wildlife Conservation Society (WCS) and is known for his work on the ecology of coral reefs. He lives and works in Mombasa, Kenya, where he studies the marine tropical ecosystems of the western Indian Ocean, and is the director of the WCS coral reefs program for eastern Africa.
Cyril Crossland was an English zoologist.
Corythoichthys flavofasciatus, known commonly as the network pipefish, reticulate pipefish and yellow-banded pipefish, is a species of marine fish in the family Syngnathidae.
Jamaica, an island located within the Caribbean Sea, known for being a popular tourist destination because of its pristine white sand beaches, is now faced with the issue of mass coral depletion. Both environmental and human factors contribute to the destruction of these corals, which inevitably affect Jamaica's environmental sustainability and economy. Actions have been put in place to counteract the negative consequences associated with the loss of the corals, which act as a symbol of hope for the revival of Jamaica's environment.
The island of Tobago has multiple coral reef ecosystems. The Buccoo Reef, the Culloden Reed and Speyside Reef are the three largest coral reef marine ecosystems in Tobago. The Buccoo Reef is a coralline reef ecosystem that is located on the southwestern region of Tobago. It is a popular ecotourism attraction where tourists can snorkel and see the coral reefs and schools of fish without diving equipment. The Trinidad and Tobago Tourism Ministry estimates that 90% of its tourists visit the Buccoo Reef while exploring Tobago. The Buccoo Reef, also known as the Buccoo Reef Complex, spans 7 km2 and has five reef flats that can reach up to 25 metres in depth. The reef complex has been designated as part of a protected Ramsar site since 2005.
The East African coral coast is a marine ecoregion along the eastern coast of Africa. It extends along the coasts of Kenya, Tanzania, and northern Mozambique, from Lamu in Kenya to Angoche in Mozambique. It adjoins the Northern Monsoon Current Coast ecoregion to the north, and the Bight of Sofala/Swamp Coast ecoregion to the south.
The coral reefs of Tuvalu consist of three reef islands and six atolls, containing approximately 710 km2 (270 sq mi) of reef platforms. The islands of the Tuvalu archipelago are spread out between the latitude of 5° to 10° south and longitude of 176° to 180°, west of the International Date Line. The islands of Tuvalu are volcanic in origin. On the atolls, an annular reef rim surrounds the lagoon, and may include natural reef channels. The reef islands have a different structure to the atolls, and are described as reef platforms as they are smaller tabular reef platforms that do not have a salt-water lagoon, although they may have a completely closed rim of dry land, with the remnants of a lagoon that has no direct connection to the open sea or that may be drying up.
Kwale Island is a protected, seasonally inhabited island in the Pemba Channel under the Tanga Marine Reserves (TMRS) with the IUCN category II located inside Kwale ward inMkinga District of Tanga Region in Tanzania. The coral island, located approximately a kilometer offshore in Manza Bay, and the modern hamlet on the shoreline are both referred to as Kwale. 86.2% of Kwale Island, or 528.1 Ha, is covered with mangroves. Kwale Island and Ulenge Island are the only seasonally inhabited by islands in the marine reserve, thus the two have the most human impact. The Island has an average elevation of 7 m (23 ft).
The Mafia Archipelago or The Mafia Islands is an group of islands across the Mafia Channel in the Mafia District of Pwani Region's coast on the Sea of Zanj in Tanzania's Indian Ocean coast. The archipelago is composed of 9 islands and around 12 coral reefs. In total, the Mafia archipelago covers 972 km2 (375 sq mi) in total, of which 8.5 km2 (3.3 sq mi) 407 km2 are land and 565 km2 are water. and has an average elevation of 53 m (174 ft). Of the 12 reefs in the archipelago the most famous one is the Tutia Reef. The nine Islands in the archipelago are. The largest island in the archipelago is Mafia Island also known as Chole Shamba locally. The other eight islands inside Mafia District in addition to Mafia Island are; Juani Island, Chole Island, Jibondo Island (Kibondo), Bwejuu Island, Shungumbili Island (Thanda), Barakuni Island, Miewi Island, and Niororo Island (Nyororo).
Tanzania,