Thursday, January 31, 2013

Mangrove Destruction Affecting Fisheries

Mexico City. The fish catch decline with the increase in the destruction of mangroves estimated annual loss of about 800 pounds of shrimp and commercial fish per hectare of these ecosystems destroyed, because the correlation between the extent of the tidal zone (mangrove the tropics) and the amount of catch in the waters adjacent said Francisco Javier Flores Verdugo, specialist in biological oceanography and fisheries.
These areas are of great importance not only for its socio-economic value, but by the ability to maintain high productivity and balance in the lagoon estuarine environments.
Fertilities presented as high as the most efficient domestic crops, in some areas reach capacity to export that adjacent marine waters and in arid regions adjacent terrestrial ecosystems are functionally equivalent to an oasis, added the researcher of the Institute of Marine Sciences and Limnology (ICMyL), Unit Mazatlan, UNAM.
Three quarters of the Earth's surface is covered by water, but 90 percent have fertility similar to that of a desert scrub. Sea fertile regions cover only 10 percent and are located within coastal ecosystems, particularly mangroves.
In fact, he added Flores Verdugo, an estimated total world fisheries, 90 percent is done in coastal regions, and of those, 70 percent are at estuarine organisms, or those who at one period of his life living in these environments.
The benefits of mangrove-estuarine and lagoon ecosystems comprise a variety of goods, services, uses and functions of value to society, flora and fauna, as well as for the maintenance of natural processes, and interact with other marine and terrestrial . For example, there is evidence that destruction causes loss of coral reef structure, detailed the university.
Mangroves are characterized by high production are habitat to support fisheries of the continental shelf, are areas of food, shelter and crustaceans and fry growth and protection of flora and fauna, including species threatened with extinction , endemic and migratory.
Systems also act as natural flood control and erosion, as hurricane protection and saline intrusion, and improve water quality by acting as a biological filter.
They also help to prevent the formation of acid soils, microclimate conditions generate, help maintain natural systems and processes in response to changes in sea level, carbon traps, and retain accretion processes, sedimentation and formation mobs, he said biological oceanographer, whose main research is primary productivity in estuarine and mangrove lagoon systems,
An estimated 60 to 75 percent of the tropical coasts are bordered by mangroves. The extension covering the country is six thousand 600 square kilometers, and ranks sixth in the world.
Have adaptations to soils rich in organic matter (anoxic) and comprise more than 50 species, of which four are widely distributed in Mexico red mangrove (Rhizophora mangle), black mangrove (Avicennia germinans), white mangrove (Laguncularia racemosa) and buttonwood (Conocarpus erectus).
In the country are referred to within the standard 059 of the General Law of Ecological Balance for conservation, with a special category for mangrove protection white, black and buttonwood, and a rare species, the red mangrove.
They are also under a conservation or sustainable use by various standards such as NOM 022 for the conservation of wetlands, he said.

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