• Source: Gulf of Honduras

The Gulf or Bay of Honduras is a large inlet of the Caribbean Sea, indenting the coasts of Belize, Guatemala, and Honduras. From north to south, it runs for approximately 200 km (125 miles) from Dangriga, Belize, to La Ceiba, Honduras.
The inner Gulf of Honduras is lined by the Belize Barrier Reef which forms the southern part of the 900 km (600 mile) long Mesoamerican Barrier Reef System, the second-largest coral reef system in the world. The Belize Barrier Reef includes a number of small islands, called cays, and collectively known as the Pelican Cays.
The Gulf of Honduras is marked by complex dynamics of coastal and open waters, and ocean currents, which have produced a very diverse and unique ecosystem with a wide variety of coastal marine waters, including coastline estuaries, barrier beaches, lagoons, intertidal salt marshes, mangrove forests, seagrass beds, keys and barrier reefs.
The gulf receives the runoff from the watersheds of 12 rivers with an estimated discharge of 1,232,000 litres (approx. 300,000 gallons) per second.
Tourists are often taken on boat trips to the Pelican Cays, notably Caye Caulker and Ambergris Caye.
In 1961 Hurricane Hattie swept across the Gulf of Honduras, destroying buildings in Belize.
The infamous pirate Blackbeard spent the winter of 1717–1718 harassing shipping boats sailing to and from the port of Vera Cruz, Mexico and traversing the Bay of Honduras. In April 1718, at Turneffe Atoll, Blackbeard captured the logwood cutting sloop Adventure and forced its captain, David Herriot, to join him. Blackbeard then made Israel Hands captain of the Adventure and began sailing for North Carolina.




Extent






= Current

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The Gulf's limits have not been demarcated by the International Hydrographic Organization. Its northernmost point is variously given as Belize City, Dangriga, or Gladden Spit; its easternmost point as Punta Sal, Punta Izopo, or La Ceiba. The northern limits are in the Belize or Stann Creek districts of Belize, while the eastern ones are in the Atlántida Department of Honduras.




= Historical

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During the 16th through 20th centuries, the Gulf's limits were thought to run from Cape Catoche to Cape Gracias a Dios.




History






= Pre-Columbian

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= Columbian

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20th century

In 10‍–‍12 December 1989, the Central American Integration System established the Commission for the Environment and Development, a body charged with coordinating environmental protection policies, projects, and programmes across the region. Upon the 12 October 1994 signing of the Alliance for the Sustainable Development of Central America, the Commission adopted its first regional environmental management plan. In 1995 and 2005, the Commission secured grant financing for its work in the Gulf.
In 1996, nine NGOs in Belize, Guatemala, and Honduras established the Trinational Alliance for the Conservation of the Gulf of Honduras (aka TRIGOH). The alliance seeks to harmonise members' management policies for marine and coastal protected areas in the Gulf, and to coordinate their management and research activities.




Geography






= Political

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= Physical

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Terrestrial

The Gulf's northern (ie Belizean) shores consist mostly of sandy beach ridges, saline tidal swamps, and shelf lagoons. It is dotted with small estuaries, mangrove forests, seagrass beds, patch and barrier reefs, and mangrove and coral cayes. The coast in the mouth of the Gulf (ie Guatemalan coastline) consists mainly of mangrove thickets, large estuaries, seagrass beds, and beaches. The southern coast (in Honduras) is marked by long beaches, vast mangroves, and mangrove and coral cays.



Marine

The Gulf's continental shelf extends some 9.32–24.85 miles (15–40 km) from shore. The northern shelf holds part of the Belize Barrier Reef, which stretches to the Sapodilla Cayes. The shelf in the mouth of the Gulf holds five parallel submarine ridges of continental origin, which jut out towards the north-northeast. It is cleaved by the Swan Island fault, which divides the North American and Caribbean tectonic plates, and forms the southern boundary of the Cayman Trough.




Climate


The Gulf's climate is tropical or sub-tropical (ie Am and Af Köppen climate classifications). Temperature varies little throughout the year, averaging 82 °F (28 °C), though this is slightly moderated to 73 °F (23 °C) by cold northerlies and trade winds blowing from North America during the winter months. Rainfall and humidity are seasonal; rainfall averages 1.98 inches (50 mm) per month during the June‍–‍October wet season, and 10.83 inches (275 mm) per month during the November‍–‍May dry season. The wet season is brought by the annual northern migration of the Intertropical Convergence Zone. Rainfall and humidity additionally vary by location, with some 118–157 inches (3,000–4,000 mm) of annual rainfall in the coastal areas, and some 394 inches (10,000 mm) in the Maya Mountains. The northeasterly trade winds are the most dominant influence on the Gulf's annual wind pattern; their speeds range from 9.84 feet (3 m) to 26.25 feet (8 m) per second. Tropical storms and hurricanes are regular between August and October, with the Gulf's northeastern (ie Belizean) section averaging 60 storms per century, and the southwestern coast (ie Guatemalan and Honduran) averaging 20 storms per century.




Geology






= Terrestrial

=
The Gulf's northern (ie Belizean) coast consists primarily of three geologic formations‍–‍ metamorphosed sediments (ie metasediments) and granite intrusions in the Maya Mountains, and coastal alluvial sediments east, southeast, and south of this range. The metasediments are the oldest rocks in Belize, formed during the Palaeozoic era some 300 mya. They form part of the Santa Rosa Group, and are composed of fine-grained phyllites, slates, and mudstones. The alluvial sediments formed during the Tertiary period some 10 mya. Primary soil types are Ossory (from metasediments), Stopper (from granite), Melinda and Puletan (from alluvial sediment), and tintal soils (ie wet, swampy type soils). The Belize Barrier Reef protects this coast from open sea waves. As such, the north-south littoral drift along this coast is primarily driven by waves formed within the reef.
The coast at the mouth of the Gulf (ie Guatemalan coast) consists primarily of alluvial material from the Quaternary era. The southern (ie Honduran) coast consists primarily of sedimentary alluvium (surficial bounders, cobbles, gravel, sand, and mud) and intrusive plutonic formations of granite, granodiorite, and diorite. These formed during the Quaternary and Cretaceous eras. The west-east littoral drift along this coast is driven mainly by open sea waves, which tend to approach the shoreline from east to west.




= Marine

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The Gulf is part of the Cayman Trench, one of five deepwater basins in the Caribbean Sea. It contains the open-sea lagoon formed by the Belize Barrier Reef, the Amatique Bay, the Atlantic coast of Guatemala, and the eastern part of the coast of Honduras. The western part of the Gulf sits on the continental shelf, which extends 37 miles (60 km) offshore, and so is rather shallow, with mean depths of less than 98 feet (30 m). Large freshwater discharge from the Sarstoon, Dulce, and Motagua rivers limit coral development in the mouth of the Gulf to a few isolated patches, as at Hunting Caye, for instance. Towards the northeastern section of the Gulf, the continental shelf drops off abruptly, from some 98 feet at the shelf break to some 6,560 feet in the Cayman Trench.




= Formation

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The Gulf's northern coast, upon the Yucatan Peninsula, reached its present location during the Late Jurassic age some 150 Mya. It was joined by the Central American platform during the Eocene epoch some 40 Mya, thereby forming a gulf or bay in or about the present location of the Gulf of Honduras.




Hydrology






= Watersheds

=
Eight primary, and 17 subsidiary, watersheds replenish the Gulf. These cover some 20,730 square miles (53,700 km2), with 2,240 sq. mi. in Belize, 7,070 sq. mi. in Guatemala, and 11,430 sq. mi. in Honduras. They contain 13 major, and various minor, rivers, with the former discharging some 77,690 cubic feet (2,200 m3) of freshwater per second, on average, and the latter, some 7,060 cubic feet per second, on average. Annually, the Gulf receives some 17.75–18.23 cubic miles (74–76 km3) of water from its watersheds. Sedimentary discharge from Belizean rivers into the Gulf was, on average, 80, 15, and 5 per cent mud, clay, and sand, respectively. Peak freshwater and sedimentary discharge occurs in the wet season, which usually exceeds dry season discharge by a factor of 5‍–‍9.




= Currents

=
The Gulf's open sea experiences the Caribbean Current and a quasi-permanent cyclonic eddy generated in the southwest corner of the Cayman Tranch. The latter is centred at about 19°N 86°W, generating a sea surface height anomaly of negative 7.9 inches (0.2 m), with peripheral current velocities of 7.9 to 15.8 inches per second (0.2–0.4 m/s).
The Caribbean Current flows from east to west in the deep waters off the continental shelf of Honduras. In doing so, every few months, it generates cyclonic, counterclockwise gyres, characterised by a central water level depression of 8‍–‍12 inches (20‍–‍30 cm), which take 2‍–‍3 months to progress westwards along the Honduran coast towards the Belize Barrier Reef.
Along the Gulf's northern (ie Belizean) coast, persistent northeasterly trade winds maintain a constant southerly downwelling, with speeds of 3.9 to 7.9 inches per second (0.1–0.2 m/s). This southern drift, in turn, drives a counterclockwise eddy along the Gulf's mouth, and along its southern coast (ie the Guatemalan and Honduran coasts).




= Tides

=
The Gulf experiences a mixed, mainly semidiurnal microtide with a mean sea surface elevation range of some 7.9 inches (0.2 m). The semidiurnal and diurnal constituent amplitudes range within 1.18‍–‍2.76 inches (0.03‍–‍0.07 m). The dominant semidiurnal and diurnal tidal constituents propagate westwards along the coast of Honduras, and northwards along the Belize Barrier Reef. Currents induced by the tide may be appreciable in constricted channels along the Belize Barrier Reef, reaching 15.75 inches per second (0.4 m/s) here. Astronomical tides are weak, and at times completely dominated by meteorological tides. For instance, the storm surge associated with Hurricane Mitch raised the mean water level at Gladden Spit 9.2 feet (2.8 m) on 27 October 1998.




= Waves

=
The northeasterly and easterly trade winds give rise to both wind waves and swell, especially during December–May. These are intensified by cold northerlies and north-westerlies blowing in from North America during November–April in bursts lasting one to three days. Waves are typically 3.28–9.84 feet (1–3 m) high, with periods of 3–7 seconds, though hurricanes may increase their height to 32.81 feet (10 m), and their period to 12.7 seconds. Mean wave direction is towards 255° (ie towards the west-southwest). The wet season's thunderstorms are often accompanied by intense gusts from varying directions, followed by periods of calm.




= Water

=
Sea-surface temperatures in the Gulf range from 81 °F (27 °C) in January‍–‍February to 84 °F (29 °C) in August‍–‍September, with the former lower temperatures associated with coastal upwelling driven by intensified trade winds. The Gulf's upper mixed layer, which has uniform temperature and salinity, is about 49 feet (15 m) in its northwest section, featuring temperatures of 83 °F (28 °C) to 88 °F (31 °C). A thermocline develops offshore at 49 to 66 feet (15 to 20 m). Sea-surface salinity in the Gulf averages 36,200 parts per million (36.2 g per kg) offshore, but drops off closer towards the coast, and especially near estuaries like the Amatique Bay, where salinity dips to 5,000–10,000 ppm (5–10 g/kg) during the wet season. Visibility in the Gulf ranges from less than 3.28 feet (1 m) near estuaries to a maximum of 108.27 feet (33 m) inside the Belize Barrier Reef. Dissolved oxygen ranges from 0.9 ppm (0.9 mg/L) near coastal areas of wastewater discharge, to 5.2–9.6 ppm (5.2–9.6 mg/L) near the Belize Barrier Reef. pH ranges from 5.8 in areas without marine vegetation (eg seagrass beds), to 7.4 in lagoons and estuaries, to 8.8 near coral reefs. Nitrate and phosphate concentrations range from levels below the detection threshold (near coral reefs), to 7.0 μM and 1.0 μM respectively (near estuaries). Chlorophyll-a concentrations range from undetectable to 0.55 ppm (0.55 mg/L).




Ecology






= Ecosystems

=
The most significant ecosystems in the Gulf are mangrove forests, seagrass beds, and coral reefs, these being some of the most productive ecosystems on Earth, in terms of mean net primary productivity, and some of the most vulnerable to changes in water quality.



Mangrove forests

The Gulf's mangrove forests are dominated by red mangroves, though black, white, and buttonwood mangroves are also present. Mangrove stands act as sediment traps in estuaries, thereby protecting coral reefs from sedimentation, and providing a primary source of nutrition and a nursery habitat for coastal marine life. They also act as a physical buffer from tropical storms for inland settlements. The largest forests sit on the Sarstoon–Temash, and the Port Honduras–Payne's Creek areas (on the southern coast of Belize, and the Atlantic coast of Guatemala). Smaller forests are located near Livingston, Dulce River, Puerto Barrios, Punta de Manabique, and in the Jeanette Kawas National Park. Mangrove stands cover at least 130,000 hectares (1,300 km2) of land in Belize, and some 708 hectares (7 km2) of Guatemala's Atlantic coast.



Seagrass beds

The Gulf's seagrass beds are dominated by turtle grass, though shoal, manatee, and tape grasses also appear. Seagrass meadows are predominantly found in clear, sandy-bottomed, surf-free, shallow waters, as found off the coast of Belize, in the Amatique Bay, and in Graciosa Bay. They cover some 3,750 hectares (37.5 km2) of the Gulf, reaching a density of some 133 plants per square foot (1,433 plants per m2). They provide a source of nutrition for marine life, and help stabilise the coast. In Belize, they serve as an important habitat for queen conch, the country's second-most important commercial fish species.



Coral reefs


The most significant coral reefs in the Gulf are those of the Belize Barrier Reef, itself part of the Mesoamerican Barrier Reef, the second-largest reef in the world. It is composed of lagoon patch reefs, fringing reefs, and offshore atolls. It is home to some 60 coral, 350 mollusc, and 500 fish species. Isolated coral patches dot the Guatemalan and Honduran coasts of the Gulf.




= Biodiversity

=
The Gulf's marine life is particularly diverse. It is home to a number of threatened and endangered marine species, most notably West Indian manatees, and green, leatherback, and hawksbill turtles.




= Protection

=
Belize was the first country in the Gulf to establish a system of protected areas. The Crown Lands Ordinance of 1924 authorised the Governor-in-Council to classify some Crown land as protected areas. The first area so classified was the Half Moon Caye Crown Reserve, a bird sanctuary established on 1 September 1928. Guatemala and Honduras established protected areas by the 1990s. Over 43, 29, and 27 per cent of the territory of Belize, Guatemala, and Honduras, respectively, are under some form of protection. Efforts to establish an international protected area in the Gulf have been hindered by the Belizean–Guatemalan territorial dispute.




Economy






= Demographics

=
The Gulf proper encompasses the Toledo and Stann Creek districts of Belize, the Izabal department of Guatemala, and the Cortés and Atlántida departments of Honduras, though the Gulf's watersheds encompass additional districts and departments. These districts are predominantly rural, ethnically diverse, and agrarian.




= Agriculture

=
Agriculture is the dominant economic activity in the Gulf, employing over 30 per cent of the labour force in Belize's southern districts, for instance. Agriculture is undertaken both for subsistence and for commerce, with coffee, cacao, and bananas being the lead exports. Bananas are an important export in all three countries of the Gulf, while coffee is a major product of Guatemala and Honduras. Smallholders tend to focus on maize, beans, and maicillo.




= Fisheries

=
The Gulf sustains a number of commercially-fished species, including shrimp, spiny lobster, queen conch, and scale fish (eg swordfish, jurel, sea bass, barracuda, tuna, pejerrey, and anchovy). Some 14.3 million pounds of fish are caught in the Gulf each year, worth some $22.8 million (11.4 million USD), with spiny lobster, queen conch, shrimp, and sardines being the major earners. The Belizean coast is particularly known for its shrimping grounds, especially off the Moho, Temash, and Sarstoon rivers, where over 150,000 pounds of shrimp are caught annually by some 200 small-scale fishermen and 10 large-scale trawlers. In the southern coast of the Gulf, some 1,415 Guatemalan and 647 Honduran small-scale fisherman are active.




= Aquaculture

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Four aquaculture farms operate on the Belizean coast of the Gulf. These predominantly grow whiteleg shrimp. In 1999, these farms grew prawn in 107 ponds spanning 722 acres, with an annual production of over two million pounds for local consumption and export.




= Tourism

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Tourism is the second-largest foreign exchange earner in the Gulf countries. In Belize, tourism has historically focussed on cayes and reefs in the northern part of the country, outside the Gulf. In 2001, for instance, only 11.1 per cent of tourists were destined towards the country's southern districts, accounting for only 6 per cent of income derived from tourist accommodation. Activities were primarily eco-cultural, with the main attractions being Mayan archaeological sites and various marine and coastal parks. Tourism infrastructure in the Guatemalan and Honduran coasts is more limited (with the exception of the Honduran Bay Islands).




= Transport

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The major port facilities in the Gulf are the Big Creek and Belize City ports in Belize, Puerto Barrios and Puerto Santo Tomás in Guatemala, and Puerto Cortés in Honduras, with the Honduran port being the only deepwater port in Central America, and one of the best equipped for cargo. In 2001, these ports accommodated nearly 4,000 ships and 12 million metric tonnes of cargo.




= Industry

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Industrial manufacturing is limited in the Gulf, particularly in the Belizean coast, where the only major factories in 2003 were two citrus and one rice processing plants. Guatemalan and Honduran manufacturing are heavily concentrated on the Gulf's watersheds.




Notes






Citations






References






= News

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= Journals

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= Print

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= Web

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= Maps

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= Reports

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External links


When Blackbeard Scourged the Seas, History.org

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