Mangrove ‘greenbelts’ to prevent coastal erosion

Tan Cheng Li, writing in the August 30, 2005 edition of the, comments that nations hit by the December 26 tsunami are now planting mangrove trees along coastlines to create ‘greenbelts’ or vegetated strips of land, in the hope of preventing further erosion of damaged shores as well as to shield them from future giant waves.

Mangroves are something of a rarity – they cover a mere 0.04% of Earth’s surface and 0.12% of its land area, and whatever mangrove resource that remains should be conserved. There is an economic benefit to this as well.

In Malaysia, it costs RM15,000 to replant one hectare of mangroves. The government has identified 4,016ha of degraded mangroves requiring rehabilitation at a cost of RM110mil. Some 151ha have been replanted so far.

Impact of the tsunami
The December 26 tsunami left behind extensive environmental damage across the region. It totally changed coastal landscapes and ecosystems. The impact included:
# Loss and degradation of mangrove and seagrass beds
# Silting and degradation of coral reefs
# Change in tidal flats and coastal lagoons
# Uplifting of the seafloor in some areas
# Turbid coastal water
# Scouring of coastline
# Inland deposition of sand
# Salination of coastal land
# Impact on fisheries

The role of mangroves during the tsunami:
# Reflect and resist tsunami energy, thus reducing the inundation depth and area.
# Trap driftwood and other debris, thus reducing human injuries and property damage.
# Prevent people from being washed out to sea.
# Reduce erosion of beaches and sand dunes which also act as barriers to tsunamis.

Research has been done into integrating mangroves and aquaculture into sustainable aquaculture-silvoculture systems.

Silvofisheries is a form of integrated mangrove tree culture with brackishwater aquaculture. It is a form of low input sustainable aquaculture. This integrated approach to conservation and utilization of the mangrove resource allows for maintaining a relatively high level of integrity in the mangrove area while capitalizing on the economic benefits of brackishwater aquaculture. Further extension of aquaculture to meet the needs of the rural poor may be tolerable provided it is carried out in a controlled manner outside those areas already heavily exploited and environmentally sensitive in an integrated program of conservation and utilization, such as silvofishery methods.

Research has also been conducted into Disused Shrimp Ponds: Options for Redevelopment of Mangrove. N.J. Stevenson describes that associated with the rapid increase in the production of cultured marine shrimp, has been large scale conversion of mangrove to shrimp ponds. Production in many regions has proven to be unsustainable, largely due to inappropriate construction methods, poor environmental conditions, overstocking and disease problems. A number of shrimp ponds are consequently unproductive and lie idle. Accurate assessments of pond disuse are difficult to obtain, however, unofficial estimates have suggested that as many as 70% of ponds may be disused after a period in production. Pond construction, shrimp culture and pond disuse lead to alterations to the physical and chemical properties of soil, hydrological conditions and the flora and fauna composition of the pond area. The case for restoration, or rehabilitation to a sustainable use, is strong. Consideration must be given to the causes of production failure, the environmental conditions remaining following disuse, the needs and preferences of pond owners and coastal managers, and technical constraints.


This entry was posted in development, ecosystems. Bookmark the permalink.

0 Responses to Mangrove ‘greenbelts’ to prevent coastal erosion

  1. Keith says:

    Did you go to university? zestril webmd Searching for dollared companies is relatively new, but asample of 20 European consumer stocks offering at least 20percent sales exposure to North America has risen by an average15 percent year to date, or three times as much as thepan-European STOXX Europe 600.

  2. Harris says:

    Very interesting tale methylprednisolone increased blood sugar Although trading revenue is by its nature a volatile lineitem, it has become even harder for analysts to predict sincethe financial crisis, said Oppenheimer analyst Chris Kotowski.Three years ago, he expected trading revenue would havestabilized by now – especially as the industry consolidated -but instead it “looks more like a Ping-Pong ball bouncing downthe stairs” than any kind of decipherable trend line, he said.If trading revenue has dropped in the third quarter, it will bethe 10th decline in the last 14 quarters, he said.

  3. Garrett says:

    Insufficient funds what is venlafaxine medication used for Far from boldly but with plenty of venom, Rush got rolling and called Fluke a slut and a prostitute who wanted to be paid for having sex, since she wanted insurance to cover her birth control. In what analysts call projection, Rush proclaimed that if taxpayers should pay for that then she in turn should put her erotic life on YouTube, to that he and pals could see what they were underwriting.

  4. Gianna says:

    We’d like to invite you for an interview is propecia better than generic finasteride Not everyone agrees. Avinoam Reches, a professor of neurology at Jerusalem’s Hadassah Medical Center and the chairperson of the ethics committee of the Israel Medical Association, says “the proof is in the pudding. If a Parkinson’s patient suffers from muscle rigidity that impedes his sleep and by smoking half a cannabis cigarette, gets muscle relaxation and calmness and is able to sleep well — and says thank you! — what scientific investigation do we need?”

  5. Monty says:

    We were at school together pricesmart pharmacy surrey bc “That’s when she was a total biotch,” Chong said. “She invited me to come to her show when I starred in ‘Commando’ and she just wasn’t having me. She’s competitive, she didn’t like me, and she was just not having me. …At the end of day, it was just a nightmare. And I ended up being backstage and she never called me on stage. And it was like, ‘You know what, f— you b—-.”

  6. Gerry says:

    What’s the exchange rate for euros? prost 8 generics Much of the Postal Service’s financial troubles stem from a2006 congressional mandate to prefund up to 75 years of itsfuture retirees’ healthcare over 10 years. Mail revenues havealso dwindled as more Americans prefer to use Internet and emailcommunications.

  7. Monte says:

    Stolen credit card clindamycin dosage for dogs At a White House meeting with Senate Republicans on Friday, Obama expressed concerns the proposed debt-limit extension was too short and also talked about the need for new revenues as part of any long-term deficit reduction plan, Republican Senator Orrin Hatch of Utah said.

  8. Delmar says:

    A staff restaurant costco+pharmacy+panama+lane bakersfield+ca Dave Low, chairman of Californians for Retirement Security,which represents active and retired public employees, said themeasure “breaks the promise of a secure retirement made tomillions of Californians, many of whom are ineligible for SocialSecurity and have an average pension of $26,000 per year.”
    gogo quinoa flakes nutrition If the trend persists, economists fear it could further depress consumer sentiment and spending. A separate report on Friday showed U.S. retail sales, while up for a fifth straight month, rose less than expected in August. So given the complex interaction between dates of a last menstrual period, measurement of a fetus that is just millimeters in size in the first trimester and the five-week range of time wherein a fetus can be born and be considered full-term, it’s not surprising that many babies pass their projected due dates. When this happens, the fetus is usually monitored a little more closely with sonograms to check the amount of amniotic fluid surrounding the baby and other parameters. Called a Biophysical Profile, this non-invasive test checks the baby’s heart rate in reaction to its body movement, it’s muscular tone, its breathing movements (fetal lungs and chest expand and make breathing movements in utero) and its body movements.
    abundant greens super greens blend This tops last month’s figures, which were described as “atrocious” by opposition parties after they revealed that 7,611 had been waiting for longer than this time period following a referral from a GP or medical practitioner.
    solu medrol iv push rate By law, the cost-of-living adjustment is based on the Consumer Price Index for Urban Wage Earners and Clerical Workers, or CPI-W, a broad measure of consumer prices generated by the Bureau of Labor Statistics. It measures price changes for food, housing, clothing, transportation, energy, medical care, recreation and education.

Leave a Reply

Your email address will not be published. Required fields are marked *