Natural and man-induced changes in a tidal channel mangrove system under tropical semiarid climate at the entrance of the Maracaibo lake (Western Venezuela)

Ernesto Medina; Hortensia Fonseca; Flora BarbozaMarta Francisco

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Natural and man-induced changes in a tidal channel mangrove system under tropical semiarid climate at the entrance of the Maracaibo lake (Western Venezuela)

机译：Natural and man-induced changes in a tidal channel mangrove system under tropical semiarid climate at the entrance of the Maracaibo lake (Western Venezuela)

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Cano Paijana is a tidal channel that connected, until recently, the Uruba bay at the mouth of the Limon river, to the Gulf of Venezuela north of Maracaibo, Venezuela. It separated the Island of San Carlos from the mainland. In the last 50 years thechannel has been drying out rapidly, to the extent that presently there is no water flow into or from the sea through its mouth opening on the Gulf of Venezuela. This mouth was covered by healthy mangroves (mainly Avicennia germinans) until at least 1952. The two extremes of the Paijana water channel differ radically today. At Uruba bay end the channel is fringed by dense mangrove vegetation dominated by Rhizophora mangle, while at the Gulf of Venezuela mouth the vegetation cover is mostly constituted by scrubby, scattered trees of Avicennia germinans, xerophytic shrubs acting as dune fixers, and halophytic strand vegetation. The process is the result of complex interaction between: a) high frequency of low-rainfall years; b) high dune activity duringdry years c) dam construction on tributaries of the Limon river that reduced discharge of fresh water into Uruba bay.

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来源
《Wetlands Ecology and Management》 |2001年第3期|233-243|共11页
作者
Ernesto Medina; Hortensia Fonseca; Flora BarbozaMarta Francisco;
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作者单位

Centro de Ecologie, Instituto Venezolano de Investigaciones Cientificas (IVIC) Aptdo. 21827. Caracas 1020-A;

artners.org;

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原文格式 PDF
正文语种英语
中图分类农业科学;
关键词
desertification; hypersalinity; land use change; mangroves; Maracaibo lake;

Natural and man-induced changes in a tidal channel mangrove system under tropical semiarid climate at the entrance of the Maracaibo lake (Western Venezuela)

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