Western Ecuador Moist Forests (NT0178) | |
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Ecology | |
Realm | Neotropical |
Biome | Tropical and subtropical moist broadleaf forests |
Bird species | 650 |
Geography | |
Area | 34,108 km2 (13,169 sq mi) |
Countries | Colombia, Ecuador |
Coordinates | 0°53′13″S79°31′23″W / 0.887°S 79.523°W Coordinates: 0°53′13″S79°31′23″W / 0.887°S 79.523°W |
Geology | Tumaco Basin |
Climate type | Am (equatorial; monsoonal) |
The Western Ecuador Moist Forests (NT0178), also known as the Pacific Forest of Ecuador, is an ecoregion in the plains and western foothills of the Andes of southern Colombia and Ecuador. At one time this region contained dense forests with highly diverse flora and fauna, and many endemic species. Most of the original habitat has now been destroyed, and the ecoregion is one of the most threatened in the world.
The Western Ecuador moist forests ecoregion covers land to the west of the Andes in Ecuador and southern Colombia. In the northwest and the extreme southwest the ecoregion extends to the Pacific Ocean. [1] The ecoregion is bounded on the north by the Patía River. It extends through the provinces of Esmeraldas, Manabí and Guayas, reaching the Gulf of Guayaquil in the south, and the foothills on the Andes in the east. It varies in width from 100 to 200 kilometres (62 to 124 mi). It has an area of 34,108 square kilometres (13,169 sq mi). [2]
In the extreme north the ecoregion transitions into the Chocó–Darién moist forests ecoregion. To the east it transitions into the Northwestern Andean montane forests. Along the Pacific coast in some areas there are sections of South American Pacific mangroves, and in others there are sections of Ecuadorian dry forests. In the south the ecoregion merges into Guayaquil flooded grasslands. [3]
The ecoregion covers the coastal plain and reaches into the foothills of the Andes to the east up to an elevation of about 800 metres (2,600 ft). The region has had strong volcanic activity, with volcanic rocks found throughout the region, alternating with marine sediments from the Tertiary era (65 million to 2.6 million years ago). The soils are fertile, particularly in the north-central area, which covers volcanic ash and lapilli. [2]
The ecoregion receives high rainfall with no significant dry season. Average annual rainfall is highest in the north, with over 7,000 millimetres (280 in) and in some areas over 8,000 millimetres (310 in). In the south annual rainfall averages 2,000 millimetres (79 in), and in all areas exceeds 1,000 millimetres (39 in). Average annual temperatures vary from 23 to 27 °C (73 to 81 °F), with little change throughout the year. [2]
At a sample location at coordinates 0°15′S79°45′W / 0.25°S 79.75°W the Köppen climate classification is Am (equatorial; monsoonal). [4] Mean temperatures range from 23.8 °C (74.8 °F) in July to 25.6 °C (78.1 °F) in April. Total yearly rainfall is about 2,100 millimetres (83 in). Monthly rainfall ranges from 33 millimetres (1.3 in) in August to 376.6 millimetres (14.83 in) in February. [4]
The ecoregion is in the neotropical realm, in the tropical and subtropical moist broadleaf forests biome. [1] The forests have many endemic species of plants and animals found only locally on mountain ridges or narrow strips of land. [2]
Natural fragmentation of the western moist forests has resulted in rapid evolution of new endemic species. Around 10,000 species of plants have been reported, of which about 2,500 are endemic. The forest has a dense canopy that exceeds 30 metres (98 ft) in height, and has many lianas and epiphytes, including many endemic species. Epiphytes of the Araceae and Cyclanthaceae families are abundant on the lower trunks of the trees. There are also mosses, lichens, ferns and palms in the dense understory. 1,250 species of plants in 136 families have been found in a single area of 100 hectares (250 acres). According to a 1990 report, 122 new orchid species had recently been identified. 43 of the species are endemic. [2]
Emergent species, which may exceed 60 metres (200 ft) in height, include the strangler fig ( Ficus dugandii ). Large, dominant canopy trees include Brosimum utile , Carapa guianensis , Guarea kunthiana and Virola dixonii . Other trees include Clarisia racemosa , Matisia coloradorum , Pourouma chocoana , Pouteria species, Pseudolmedia eggersii and Symphonia globulifera . The endemic tree Humiriastrum procerum grows to the north of the Guayllabamba River, and is often logged for use in construction. Common understory species include the Iriartea deltoidea and Wettinia quinaria palms. Rare species such as Dicliptera dodsonii are found at the Río Palenque Scientific center in Esmeraldas. There are records of rare or extinct flora such as Carapa megistocarpa and Erythrochiton carinatus . [2]
According to a 1990 report, 5 new mammal species had recently been identified. The jaguar (Panthera onca) is endangered. [2] Other endangered mammals include Baird's tapir (Tapirus bairdii), equatorial dog-faced bat (Molossops aequatorianus) and Geoffroy's spider monkey (Ateles geoffroyi). Endangered reptiles include Boulenger's least gecko ( Sphaerodactylus scapularis ), green sea turtle (Chelonia mydas) and hawksbill sea turtle (Eretmochelys imbricata). [5] The American crocodile (Crocodylus acutus) is also threatened. [2]
650 species of birds were identified in a 1993 survey, of which many are threatened. Species found in the most humid areas include the Baudo guan (Penelope ortoni), Berlepsch's tinamou (Crypturellus berlepschi), blue-whiskered tanager (Tangara johannae), brown wood rail (Aramides wolfi), crowned woodnymph (Thalurania colombica), El Oro parakeet (Pyrrhura orcesi), El Oro tapaculo (Scytalopus robbinsi), indigo flowerpiercer (Diglossa indigotica), long-wattled umbrellabird (Cephalopterus penduliger) and scarlet-breasted dacnis (Dacnis berlepschi). Species found in less humid areas include grey-backed hawk (Pseudastur occidentalis), ochraceous attila (Attila torridus) and rufous-headed chachalaca (Ortalis erythroptera). Humboldt's sapphire (Hylocharis humboldtii) is found only in the mangroves to the north. Species that have almost been wiped out due to hunting and habitat fragmentation include crested guan (Penelope purpurascens), great curassow (Crax rubra), great green macaw (Ara ambiguus), great tinamou (Tinamus major) and harpy eagle (Harpia harpyja). [2] Endangered birds include banded ground cuckoo (Neomorphus radiolosus), Baudo guan (Penelope ortoni), Esmeraldas woodstar (Chaetocercus berlepschi), great green macaw (Ara ambiguus), grey-backed hawk (Pseudastur occidentalis), grey-cheeked parakeet (Brotogeris pyrrhoptera), rufous-brown solitaire (Cichlopsis leucogenys) and slaty becard (Pachyramphus spodiurus). [5]
Endangered amphibians include Rio Pescado stubfoot toad ( Atelopus balios ), elegant stubfoot toad (Atelopus elegans), phantasmal poison frog (Epipedobates tricolor), horned marsupial frog (Gastrotheca cornuta), Pichincha rocket frog ( Hyloxalus toachi ), Pristimantis colomai , spring robber frog ( Pristimantis crenunguis ), Alto Tambo rain frog ( Pristimantis degener ), hotel robber frog ( Pristimantis tenebrionis ), blue-spotted toad ( Rhaebo caeruleostictus ) and Rio Pitzara robber frog ( Strabomantis helonotus ).
The World Wide Fund for Nature (WWF) gives the region the status of "Critical/Endangered". Construction of highways and exploration for oil between 1960 and 1980 caused the destruction of most of the moist forests, now one of the most threatened of the world's habitats. Ongoing main threats come from banana plantations and palm oil and rubber extraction. Most of the moist forests in the ecoregion are in the Esmeraldas province between the San Lorenzo Canton south of the Chocó forests of Colombia and Quinindé. There are only small remnants of the original forest elsewhere in the region, and these are degraded near their margins. There are fairly well preserved narrow strips of forest parallel to the mountains in the north, but these are being damaged by settlements and indiscriminate logging. There is some protection in the Cotacachi Cayapas Ecological Reserve, and the highlands from 400 to 900 metres (1,300 to 3,000 ft) are within the Machalilla National Park. The Rio Palenque Scientific Station contributes to research and protection. [2]
The Ecuadorian dry forests (NT0214) is an ecoregion near the Pacific coast of the Ecuador. The habitat has been occupied by people for centuries and has been severely damaged by deforestation, overgrazing and hillside erosion due to unsustainable agriculture. Only 1% of the original forest remains. The patches of forest, mostly secondary growth, are fragmented. They are home to many endemic species at risk of extinction.
The Patía Valley dry forests (NT0225) is an ecoregion in southwestern Colombia. It covers a dry valley surrounded by mountains. The original habitat has mostly been destroyed by human activity, although a few pockets remain.
The Magdalena Valley dry forests (NT0221) is an ecoregion in Colombia along the upper Magdalena River, a large river that runs from south to north between the two main cordilleras of the Andes. There are many endemic species, but much of the original habitat has been destroyed by agriculture and over-grazing, mainly by goats. The habitat is not protected by any national park, and is at risk of complete destruction.
The Northern Andean páramo (NT1006) is an ecoregion containing páramo vegetation above the treeline in the Andes of Colombia and Ecuador. In the past, when the climate was cooler, the treeline and the páramo units were lower and the units were connected. During the present warmer Holocene epoch the páramos have migrated uphill, shrinking and becoming isolated. They contain many rare or endangered species, some of them restricted to a narrow area of one mountain or mountain range. The ecoregion is relatively well preserved, but faces threats from over-grazing and farming.
The Santa Marta páramo (NT1007) is an ecoregion containing páramo vegetation above the treeline in the Sierra Nevada de Santa Marta mountain range on the Caribbean coast of Colombia. The isolated position of the range has allowed unique species to evolve. Some are related to those found in Central America and the Caribbean coastal areas, and some to species from the Andes. The habitat is relatively stable, but has been drastically changed from the original by long-term human activity.
The Cordillera Central páramo (NT1004) is an ecoregion containing páramo vegetation above the treeline in the Andes mountain range of northern Peru and southern Ecuador. Due to its isolation there are high levels of endemism. Despite many human settlements and some destruction of habitat by agriculture and mining, the ecoregion is relatively intact.
The Venezuelan Andes montane forests (NT0175) is an ecoregion in the northern arm of the Andes in Venezuela. It contains montane and cloud forests, reaching up to the high-level Cordillera de Merida páramo high moor ecoregion. The forests are home to many endemic species of flora and fauna. Their lower levels are threatened by migrant farmers, who clear patches of forest to grow crops, then move on.
The Cordillera Oriental montane forests (NT0118) is an ecoregion in Venezuela and Colombia along the east slopes of the eastern cordillera of the Andes. The extensive region of submontane and montane forests includes distinctive flora and fauna in the north, center and southern sections. The ecoregion is home to numerous endemic species of fauna. Despite extensive changes due to logging, farming and ranching, large areas of the original habitat remain intact, and the ecoregion has rich biodiversity.
The Catatumbo moist forests (NT0108) is an ecoregion in Venezuela and Colombia to the west and east of Lake Maracaibo. It includes four regions of moist forest on slightly higher ground than the dry forest and mangroves that surround the lake. The forest has unique flora related to the flora of the Amazon basin. It is badly degraded due to farming, livestock grazing and oil exploration.
The Maracaibo dry forests (NT0222) is an ecoregion in Venezuela around Lake Maracaibo. It contains the country's main oil fields. The habitat is criss-crossed by roads and is severely degraded by farming and livestock grazing.
The Napo moist forests (NT0142) is an ecoregion in the western Amazon rainforest of Colombia, Ecuador and Peru.
The Magdalena–Urabá moist forests (NT0137) is an ecoregion in the north of Colombia. The terrain is largely flat or undulating, but includes mountainous areas in the south. It contains moist forests and large wetlands that are important to resident and migratory birds. The ecoregion forms a bridge between the Pacific coast ecoregions of Colombia and Central America, and the ecoregions of the Andes and Amazon. It is surrounded by the more populated parts of Colombia and is threatened by farming, ranching, logging, oil exploitation and water pollution in the main rivers.
The Chocó–Darién moist forests (NT0115) is an ecoregion in the west of Colombia and east of Panama. The region has extremely high rainfall, and the forests hold great biodiversity. The northern and southern parts of the ecoregion have been considerably modified for ranching and farming, and there are threats from logging for paper pulp, uncontrolled gold mining, coca growing and industrialisation, but the central part of the ecoregion is relatively intact.
The Northwestern Andean montane forests (NT0145) is an ecoregion on the Andes mountains in the west of Colombia and Ecuador. Both flora and fauna are highly diverse due to effect of ice ages when the warmer climate zones were separated and the cooler ones combined, and interglacial periods when the reverse occurred. Because the environment is hospitable to humans, the habitat has been drastically modified by farming and grazing since the Pre-Columbian era.
The Magdalena Valley montane forests (NT0136) is an ecoregion in the Andes mountains of central Colombia.
The Cauca Valley montane forests (NT0109) is an ecoregion in western Colombia. It covers the sides of the Cauca Valley, which runs from south to north between the Central and Western Ranges (cordilleras) of the Colombian Andes. The ecoregion is home to very diverse fauna and flora, due in part to its varied elevations and climates, in part to its position near the isthmus of Panama, the route along which North American species invaded South America and then diversified as they moved to the upper parts of the Andes. Little of the original habitat remains at lower levels, but higher up there are sizeable blocks of forest, some of which ate protected.
The Santa Marta montane forests (NT0159) is an ecoregion in the Sierra Nevada de Santa Marta, a massif on the Caribbean coast of northern Colombia. The ecoregion covers altitudes from near sea level up to around 3,300 metres (10,827 ft), where it gives way to Santa Marta páramo. The isolation of the massif and the range of elevations and climates has resulted in a wide variety of species including many endemics. The lower levels contained tropical rainforest, which has largely been cleared. Higher up, this gives way to cloud forest. Much of this has also been cleared for coffee plantations, pasture for sheep and cattle, and farming.
The Eastern Cordillera Real montane forests (NT0121) is an ecoregion in the eastern range of the Andes of southern Colombia, Ecuador and northern Peru. The ecoregion covers the eastern slopes of the Andes, and includes montane forest that rises from the Amazonian rain forest, with cloud forest and elfin forest at higher elevations. It is rich in species, including many endemics. It is threatened by logging and conversion for pasturage and subsistence agriculture.
The South American Pacific mangroves, or Panama Bight mangroves, is an ecoregion along the Pacific coast of Panama, Colombia, Ecuador and Peru.
The Mache-Chindul Ecological Reserve is an ecological reserve in the provinces of Esmeraldas and Manabí, Ecuador. It protects a mountainous area in the transition from tropical rain forest in the north to dry forest in the south. It contains the Cube Lagoon, which has been designated a Ramsar wetland of international importance.