Ecology Tropical Elevation

Ecology Tropical Elevation - Tropical Life Zones by...

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Tropical Life Zones by Altitude A large number of distinctive communities based on elevational gradients are found in the tropics. Holdridge et al. (1971) recognized four different elevational zones in Costa Rica, five in Central America and six in South America.
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Tropical Life Zones by Altitude The highest two include a paramo or sub alpine zone, and an alpine zone or wet-rain tundra. Within each altitudinal zone there are moisture differences reflecting the wet-moist- dry zones from the lowlands. Moisture increases and dry seasons become reduced with altitude.
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Tropical Life Zones by Altitude The altitude where one life zone fades into another one depends on the site, the prevailing winds, and other factors. Therefore a given life zone occurs at different altitudes in different places.
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Tropical Life Zones by Altitude Changes in the physical environment with altitude are summarized in the first part of Table 2. Temperature drops about 0.56 o C per 100 m of elevation in Peru (Terborgh 1977); worldwide the quoted figure is 0.4 – 0.7 o C (Richards 1966).
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Table 2. Environmental and Soil Conditions by Life Zone for Selected sites in Costa Rica. Data from Holdridge et al. (1971). Life Zone
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Ecology Tropical Elevation - Tropical Life Zones by...

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