Mangrove ‘greenbelts’ to prevent coastal erosion

Tan Cheng Li, writing in the August 30, 2005 edition of the thestar.com.my, 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. 2017年最高スーパーコピー 服、財布.
    ★2017年春、夏節男性、女性に超人気がある新素材入荷★
    スーパーコピー 服 、ブランド コピーネットショップとしてずっと多くのお客様に信頼頂いております。 品質よくて、 激安 の大特価でご提供します。
    ★2017年新品バッグ、財布、手帳、腕時計、ブランド 靴、ファッション 服
    ★2017年男性、女性に超人気がある新素材
    ★2017年の新素材-新作!高品質の追求
    ■主要取扱商品 スーパーコピー 服 バッグ、財布、腕時計、マフラー!

  2. 丁寧な梱包で満足しました。
    カードも添えてあり、商品や顧客にたいしても丁寧なショップだと
    おもいます。
    また購入したくなるショップです。
    クリスチャンディオールトートバッグ♪送料無料 新品SAランク クリスチャンディオール トートバッグ パナレア スモール ショッピングバッグ M1010PPCD PVC カナージュキルティング レザー カーキ 新品 ショルダーバッグ 革 141104019 (旭) Chiristian Dior C.Dior PANAREA
    仕事用にぴったり
    A3書類が入り、なお、軽いバッグを探していました。
    仕事用ですので、お値段も手ごろ。
    色も、グレイに近い色で気に入りました。

  3. サービスが素早くて親切で商品もきれいでとても気に入りました。永遠がありましたら、また宜しくお願いします。どうもありがとうございました。^o^
    ★PRADA プラダ★トートバッグ★BR2167★ナイロン×カーフ★ベージュ×ブラウン★

  4. I simply wanted to say thanks once more. I do not know the things I could possibly have undertaken without the type of tactics contributed by you about my problem. Certainly was a terrifying setting in my position, nevertheless observing a specialised form you treated it forced me to weep for gladness. I’m grateful for the work and then pray you recognize what a great job you are always carrying out educating some other people through your site. I know that you’ve never come across any of us.

  5. ルイヴィトンコピー老舗
    海外人気ルイヴィトン コピー老舗です。
    いろいろ高品質ルイヴィトンコピー品を販売しております。
    開業多年、安心と信頼のヴィトンバッグコピー激安専門ショップです

  6. スーパーコピーブランド専門ネットショップで、ファッション時計,バッグ,財布とその他の世界一流ブランドスーパーコピー激安販売。
    弊店のスーパー コピーブランド時計は日本全国送料手数料無料です。
    ブランドコピー品の華麗さや実用でお客様に驚喜を与えます。
    バッグ,財布&小物専門店, https://www.88kopi.com/menu/menu-77.html

  7. 事前に問い合わせ済だったので安心して購入できました。手書きのメッセージもとても感じよかったです。
    ★ルイヴィトン★ヴェルニ★ポルトフォイユ・サラ★ファスナー付長財布★M91741★ブルーラゴン(廃カラー)★カード10枚収納★
    届きました!
    すでに廃盤になっているこの商品の新品を探していました。未使用品の新品でしたが、もう出会えないと思ったので購入しました。今日届きました。
    確認す
    と記載にあるとおり微細なキズはあるものの
    気にならない程度でした。ヴィトンのタグも
    っていました。商品ページには書かれていませんでしたが、純正の箱もありました。良い
    スーパーコピー 財布 国内 https://www.copysale.net/Copy-sale-4802-_25E3_2582_25AF_25E3_2583_25AA_25E3_2582_25B9_25E3_2583_2581_25E3_2583_25A3_25E3_25830791EC4C3E.htm

Leave a Reply

Your email address will not be published.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