Gulf of Guayaquil–Tumbes mangroves

Gulf of Guayaquil–Tumbes mangroves (NT1413)
Mangroves in the Guayaquil Historical Park
Ecoregion territory (in red)
Ecology
RealmNeotropical
BiomeMangroves
Borders
Geography
Area3,400 km2 (1,300 sq mi)
Country
Coordinates2°34′01″S 79°45′36″W / 2.567°S 79.760°W / -2.567; -79.760

The Gulf of Guayaquil–Tumbes mangroves (NT1413) are an ecoregion located in the Gulf of Guayaquil in South America, in northern Peru and southern Ecuador. It has an area of 3,300 km2 (1300 sq mi).

Location

The mangroves are found between Ecuador and Peru where many rivers empty into the Pacific and the Gulf of Guayaquil. They fringe the Gulf of Guayaquil and the northwestern Pacific Coast of Peru near Tumbes. They cover an area of 1,300 square miles (3,400 km2).[1] Inland the mangroves transition into areas of Ecuadorian dry forests, Western Ecuador moist forests and in the south the Tumbes–Piura dry forests, which extend into Peru.[2]

The Gulf of Guayaquil is the largest estuary ecosystem on South America's Pacific coast. The flat land and high tides result in salt water moving far up the gulf. Average annual rainfall is 600 millimetres (24 in), but in some years may be as much as 3,800 millimetres (150 in).[3]

Ecology

The ecoregion is part of the Panama Bight Mangroves, a Global ecoregion, which contains the Gulf of Panama mangroves, Esmeraldas–Pacific Colombia mangroves, Manabí mangroves and Gulf of Guayaquil–Tumbes mangroves.[4]

Flora

The ecoregion contains plant formations of mangrove (Rhizophora spp.) forest that are adapted to permanently flooded conditions and the resulting environments, which offer little available oxygen.

The Tumbes River is the southern limit for some mangrove species.[3]

Fauna

There 13 mammal and reptile species, including the American crocodile (Crocodylus acutus) at its southern limit. There are more than 40 species of birds including the Neotropic cormorant (Phalacrocorax brasilianus), white-necked heron (Ardea pacifica), great egret (Ardea alba), American white ibis (Eudocimus albus), roseate spoonbill (Platalea ajaja), osprey (Pandion haliaetus), white-winged guan (Penelope albipennis) and horned screamer (Anhima cornuta).[3]

Status

Large parts of the mangroves have been destroyed to make way for aquaculture, rice farms, housing and industry. Other threats come from mercury pollution from gold and silver mining upstream in the Puyango-Tumbes watershed, urban pollution and dams.[3] In Ecuador about 40,000 hectares (99,000 acres) of mangroves were lost in the 1980s and early 1990s due to unsustainable shrimp pond development. Since then the mangroves have been slowly recovering, and seem stable.[5]

On Ecuador's side of the mangrove ecoregion, particularly near the cities of Machala and Santa Rosa in the province of El Oro, many shrimp farm ponds have been dug out for export of shrimp to the U.S., Europe and other regions. Shrimp are one of Ecuador's main exports together with crude oil and derivatives, bananas and ornamental flowers.

On the Peruvian side some of the mangroves are protected by the Manglares de Tumbes National Sanctuary.

Notes

  1. ^ Juan Carlos Riveros Salcedo.
  2. ^ WildFinder – WWF.
  3. ^ a b c d Gulf of Guayaquil-Tumbes mangroves ... Wild World.
  4. ^ Panama Bight Mangroves – WWF Global.
  5. ^ Serena Fortuna 2007, p. 45.

Sources

  • Gulf of Guayaquil-Tumbes mangroves (NT1413), Wild World, archived from the original on 2010-03-08, retrieved 2017-06-20{{citation}}: CS1 maint: bot: original URL status unknown (link)
  • Juan Carlos Riveros Salcedo, Western South America: Ecuador and Peru (NT1413), WWF: World Wide Fund for Nature, retrieved 2017-06-19
  • Panama Bight Mangroves, WWF Global, retrieved 2017-06-19
  • Serena Fortuna (2007), "8: South America", The world's mangroves 1980-2005 (PDF), FAO, ISBN 978-92-5-105856-5, retrieved 2017-06-19
  • WildFinder, WWF: World Wildlife Fund, retrieved 2017-06-18

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