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Cayo Levisa
Cayo Levisa is a cay in Pinar del Río Province, Cuba. Accessible only through boats from Palma Rubia, the white sand beaches on its north coast attract tourism. It has several snorkeling and diving sites. It is part of the Colorados Archipelago coral reef and well known for its black coral. Geography The cay is roughly 1.5 km2 (150 hectares) in size and 4.2 km long. It is several hundred yards wide in most points, with a maximum width of 750 m and a minimum of 280 m. It is located roughly 150 km west of Havana. Swamps cover more than three quarters of the surface of the island; the south side is inaccessible due to a forest of mangroves. Climate The average temperature in Cayo Levisa is between 21 °C and 33 °C and the water temperature varies between 1 °C and 3 °C. Coral reefs The Benthic zone of the coral reef was analysed in 2002 and 2003. Foliaceous and calcareous algae cover at least half of the substrate. Live coral cover was 30–40%, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinar Del Río Province
Pinar del Río is one of the provinces of Cuba. It is at the western end of the island of Cuba. Geography The Pinar del Río province is Cuba's westernmost province and contains one of Cuba's three main mountain ranges, the Cordillera de Guaniguanico, divided into the easterly Sierra del Rosario and the westerly Sierra de los Órganos. These form a landscape characterised by steep sided limestone hills (called mogotes) and flat, fertile valleys. One such topographic feature, the Viñales Valley, is a UNESCO World Heritage Site. The northern coast opens to the great Gulf of Mexico, and is lined by the Colorados Archipelago, a string of cays and isles developed on a reef barrier. The westernmost point of Cuba, Cabo San Antonio, is located on the Guanahacabibes Peninsula, which is a National Park and a Biosphere Reserve. History The city was founded by the Spanish as ''Nueva Filipinas'' (New Philippines), and the city was renamed Pinar del Río in 1774. The province was founded i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuba
Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Cuba is located east of the Yucatán Peninsula (Mexico), south of both the American state of Florida and the Bahamas, west of Hispaniola ( Haiti/Dominican Republic), and north of both Jamaica and the Cayman Islands. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camagüey. The official area of the Republic of Cuba is (without the territorial waters) but a total of 350,730 km² (135,418 sq mi) including the exclusive economic zone. Cuba is the second-most populous country in the Caribbean after Haiti, with over 11 million inhabitants. The territory that is now Cuba was inhabited by the Ciboney people from the 4th millennium BC with the Gua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snorkeling
Snorkeling ( British and Commonwealth English spelling: snorkelling) is the practice of swimming on or through a body of water while equipped with a diving mask, a shaped breathing tube called a snorkel, and usually swimfins. In cooler waters, a wetsuit may also be worn. Use of this equipment allows the snorkeler to observe underwater attractions for extended periods with relatively little effort and to breathe while face-down at the surface. Snorkeling is a popular recreational activity, particularly at tropical resort locations. It provides the opportunity to observe underwater life in a natural setting without the complicated equipment and training required for scuba diving. It appeals to all ages because of how little effort is involved and is the basis of the two surface disciplines of the underwater sport of finswimming. Snorkeling is also used by scuba divers when on the surface, in underwater sports such as underwater hockey and underwater rugby, and as part of water-b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Diving
Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. It is also often referred to as diving, an ambiguous term with several possible meanings, depending on context. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well-adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done. In ambient pressure diving, the diver is directly exposed to the pressure of the surrounding water. The ambient pressure diver may dive on breath-hold (freediving) or use breathing apparatus for scuba diving or surface-supplied diving, and the saturation diving technique reduces the risk of decompression sickness (DCS) after long-duration deep dives ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorados Archipelago
The Colorados Archipelago ( es, Archipiélago de los Colorados, also called ''Archipiélago de Santa Isabel'' and ''Archipiélago de Guaniguanico'') is a chain of isles and cays on Cuba's north-western coast. The sea surrounding the islands is used mainly for fishing, with commercial captures of lobster, sponge, oysters, red snapper and tuna. Tourism is also developed on cays such as Cayo Levisa, where white sand beaches, as well as snorkeling and diving sites attract tourists. Geography Colorados Archipelago is developed on a reef barrier located off the northern coast of the Pinar del Río Province, facing the Gulf of Mexico, between the Honda Bay (north of the homonymous Bahia Honda community) and Cape San Antonio on the Guanahacabibes Peninsula. The archipelago is approximately long and is composed of small cays such as Cayo Levisa, Cayo Arenas, Cayo Jutias, Punta Tabaco, Cabezo Seco, Cayo Paraiso, Cayo Buenavista, Banco Sancho Pardo, Cayo Rapado Grande, and Cayo Alacranes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coral Reef
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 belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and jellyfish. Unlike sea anemones, corals secrete hard carbonate exoskeletons that support and protect the coral. Most reefs grow best in warm, shallow, clear, sunny and agitated water. Coral reefs first appeared 485 million years ago, at the dawn of the Early Ordovician, displacing the microbial and sponge reefs of the Cambrian. Sometimes called ''rainforests of the sea'', shallow coral reefs form some of Earth's most diverse ecosystems. They occupy less than 0.1% of the world's ocean area, about half the area of France, yet they provide a home for at least 25% of all marine species, including fish, mollusks, worms, crustaceans, echinoderms, sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Coral
Antipatharians, also known as black corals or thorn corals, are an order of soft deep-water corals. These corals can be recognized by their jet-black or dark brown chitin skeletons, surrounded by the polyps (part of coral that is alive). Antipatharians are a cosmopolitan order, existing at nearly every location and depth, with the sole exception of brackish waters. However, they are most frequently found on continental slopes under deep. A black coral reproduces both sexually and asexually throughout its lifetime. Many black corals provide housing, shelter, food, and protection for other animals. Black corals were originally classified in the subclass Ceriantipatharia along with ceriantharians (tube-dwelling anemones), but were later reclassified under Hexacorallia. Though they have historically been used by Pacific Islanders for medical treatment and in rituals, its only modern use is making jewelry. Black corals have been declining in numbers and are expected to continue d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Havana
Havana (; Spanish: ''La Habana'' ) is the capital and largest city of Cuba. The heart of the La Habana Province, Havana is the country's main port and commercial center.Cuba ''''. . The city has a population of 2.3million inhabitants, and it spans a total of – making it the largest city by area, the most populous city, and the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangroves
A mangrove is a shrub or tree that grows in coastal saline or brackish water. The term is also used for tropical coastal vegetation consisting of such species. Mangroves are taxonomically diverse, as a result of convergent evolution in several plant families. They occur worldwide in the tropics and subtropics and even some temperate coastal areas, mainly between latitudes 30° N and 30° S, with the greatest mangrove area within 5° of the equator. Mangrove plant families first appeared during the Late Cretaceous to Paleocene epochs, and became widely distributed in part due to the movement of tectonic plates. The oldest known fossils of mangrove palm date to 75 million years ago. Mangroves are salt-tolerant trees, also called halophytes, and are adapted to live in harsh coastal conditions. They contain a complex salt filtration system and a complex root system to cope with saltwater immersion and wave action. They are adapted to the low-oxygen conditions of water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthic Zone
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "the depths." Organisms living in this zone are called benthos and include microorganisms (e.g., bacteria and fungi) as well as larger invertebrates, such as crustaceans and polychaetes. Organisms here generally live in close relationship with the substrate and many are permanently attached to the bottom. The benthic boundary layer, which includes the bottom layer of water and the uppermost layer of sediment directly influenced by the overlying water, is an integral part of the benthic zone, as it greatly influences the biological activity that takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud. Description Oceans The benthic region of the ocean begins at the shore line (intertida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Plague (coral Disease)
White plague is a suite of coral diseases of which three types have been identified, initially in the Florida Keys. They are infectious diseases but it has proved difficult to identify the pathogens involved. White plague type II may be caused by the gram negative bacterium ''Aurantimonas coralicida'' in the order Hyphomicrobiales but other bacteria have also been associated with diseased corals and viruses may also be implicated. History In 1977, a disease of scleractinian corals appeared on reefs off the Florida Keys in the United States and was termed white plague. It caused white lesions and was shown to be an infectious disease, being particularly prevalent in ''Mycetophyllia ferox''. This disease caused little mortality and occurred sporadically, but was still present in the area in 1984. It is now known as white plague type 1. In 1995, a new coral disease was described as an epizootic disease in the same reefs in the Florida Keys. Many species of coral found in the area were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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