how do mangroves protect the coast from tsunamis

Effectiveness of mangrove forests to protect . New Scientist: Following the 2004 tsunami in the Indian Ocean, several studies examined satellite data to determine the ability of mangrove forests to protect communities from the destructive effects of such seismic sea waves.One study found an 8% reduction in fatalities in villages protected by mangrove forests. Mangroves have adapted to their intertidal environments and are able to withstand furious high-energy tidal events. Usually mangrove forest do not slow down coastal erosion, however they may enhance coastal accretion. In places like this stretch of Ecuadorian coast near the city of Guayaquil, losing the mangroves would portend the loss of the mud crabs—the primary source of income for some local fishing communities—and have a severe impact on surrounding ecosystems as well. An estimated 26 percent of mangroves have been destroyed around the Indian Ocean through conversion to farm fields, aquaculture ponds, or from other causes, exposing the coast to accelerated erosion. Mangroves represent far more than just a ‘bio-shield’. Any use is subject to the Terms of Use. For example, studies analyzing the effects of tsunamis on shoreline areas have determined that mangroves suffering from various types of ecological degradation were less resistant than unaltered pristine mangroves. ing tsunami events. Following typhoon Haiyan, the Philippines’ Department for Environment and Natural Resources has earmarked around US$8m to fund efforts to replant much of the affected coastal zone with mangrove forests. They have several ecological and physical functions that are essential in maintaining biodiversity and protecting populations of humans and animals. Why trees and not, say, concrete? Accessibility policy. Mangroves reduce wave height by as much as 66 percent over 100 meters of forest providing a vital buffer against the impacts of storms, tsunamis, … Reports suggest up to 80% of the money is likely to be channelled to residents to engage them in tree planting activities as part of the country’s cash-for-work programme. Mangroves grow in partially flooded sediments along thousands of kilometers of the world’s tropical coastlines. Mangroves are shrubs and trees that grow in coastal saline waters in the tropics, where the water temperature is above 20 degrees Celsius. (Credit: National Park Service), Mangrove forests provide protection against tsunamis. The extent to which mangroves reduce the damage caused by typhoons (as well as tsunami) is still debated, but the evidence suggests that mangroves provide an … Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information. For example, certain mangrove species can block or buffer wave action via their stems and aerial roots, which can measure 30 m (98 ft) in height. Efforts to plant and replant more mangroves, such as those planned in the Philippines, are laudable. One study was conducted in the aftermath of the massive 2004 Indian Ocean earthquake and tsunami that devastated huge areas in Indonesia, Thailand, Sri Lanka, and India, as … Mangrove forests grow along the coast in fine, salty sediments across the tropics and sub-tropics. However, the elimination of many mangrove habitats, predominantly by human activities (for example, deforestation, land reclamation for tourist enterprises, and fragmentation caused by urbanization), has created a scenario in which coastal areas (particularly in Southeast Asia) are more vulnerable to the destructive effects of a tsunami event. The finding follows a report published earlier this year (January) which said that mangroves were not effective against tsunamis (see Mangroves do not protect against tsunamis).

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