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Mist and fog interception in elfin cloud forests in Colombia and Venezuela

Published online by Cambridge University Press:  10 July 2009

Jaime Cavelier  and
Guillermo Goldstein
Jaime Cavelier
Affiliation:
Departmento de Biologia, Facultad de Ciencias, Universidad de los Andes, Merida, Venezuela
Guillermo Goldstein
Affiliation:
Departmento de Biologia, Facultad de Ciencias, Universidad de los Andes, Merida, Venezuela
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Abstract

Fog interception and rainfall were measured during one year in three elfin cloud forests on small mountains along the Caribbean coast of South America and one in the Venezuelan Andes. (1) While rainfall increases from west to east in the small mountains along the coast, fog interception decreases. In 1985, the total annual rainfall and fog interception were 853 mm and 796 mm in the cloud forest of Serrania de Macuira, 1630 mm and 518 mm in Cerro Santa Ana and, 4461 mm and 480 mm in Cerro Copey. In the Andean forest of El Zum-bador, the 1985 rainfall was 1983 mm and the annual fog interception was only 72 mm. (2) Fog interception seems to be an important source of water to the elfin cloud forests of the small mountains which are surrounded by dry vegetation types and where the rainfall regime is highly seasonal. (3) Fog interception increases with altitude (in the same mountain), exposure (windward slopes) and leaf inclination. These variations of fog interception could partially explain the observed distribution of epiphytic flora in some of these cloud forests.

Keywords

cloud forestColombiafog interceptionleaf anglemistmountain forestsNeotropicstropical mountainswater sourcesVenezuela
Type
Research Article
Information
Journal of Tropical Ecology , Volume 5 , Issue 3 , August 1989 , pp. 309 - 322
Copyright
Copyright © Cambridge University Press 1989

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