Importance of Mangrove - Malaysian Nature Society...2019/03/05 · adaptations Pneumatophores of...
Transcript of Importance of Mangrove - Malaysian Nature Society...2019/03/05 · adaptations Pneumatophores of...
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Importance of
Mangrove
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• Woody trees/shrubs that grow in coastal habitat.
Total of 57 true mangrove species recorded in Sungai Merbok, Kedah)
Rhizophora stylosa _ Pulau
Sibu,Johor
Matang Mangrove Forest Reserve, Perak
Nipah at the Head of Sungai Bujang, Kedah
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•Daily tidal innundation
•Fluctuating salinity
•Unstable & anaerobic substrate
•Wave impacts
The tough gets going
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Prop roots of Rhizophora sp.
Physiological
adaptations
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Kneed roots of Bruguiera & Ceriops
(Bakau Putih) Plank roots of Xylocarpus
(Nyireh bunga)
Physiological
adaptations
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Pneumatophores of Avicennia (Api-api)
Physiological
adaptations
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anaerobic
substratum
Mangrove roots &
trunks have lenticels
for gas exchange
Physiological
adaptations
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Vivipary
Physiological
adaptations
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Value of mangroves –
Maintenance of Channel Depth / Sediment Accretion
•Scouring effects-Flood tides flow
faster than ebb tides-flush out
sediment from the main channel
•Physical & chemical property of
mangrove trees and substrate
help to trap sediment
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Mangrove as giant water filter system!
Filtering pollutants from land (Roots help to hold suspended
material and assimilating dissolved nutrients.)
Stabilization of bottom sediments (water less turbid).
Overall water quality improvements.
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Value of mangroves –
Coastal Protection
Acheh, 2004 tsunami
Highly
impacted
areas
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Moderate to low
tsunami impacted
area
Value of mangroves –
Coastal Protection
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Value of mangroves –
Coastal Protection
Penang Scenario
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Matang Mangrove Forest Reserve
40,466 hectares,348 kilns,
Revenue Of RM29.73 million annually.
Value of mangroves – Timber
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Mangrove roots provide shelter
for snappers
Value of mangroves – Fisheries / Reef-Mangrove connection
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Value of mangroves – durian production
Watzke &
Lensing, 2003
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Value of mangroves – Other products
Anadara granosa (Blood cockle) Polymesoda expansa (Lokan)
Episesarma sp. (Vinegar crab) Fruits of Nipah Palm
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Value of mangroves – Bird Sanctuary / Migratory Stops
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Value of mangroves – Ecotourism
Australia
Eco-Educational Forest,
Kuala Sepetang, Perak
Pulau Sibu, Johor
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Destruction of Mangrove ~ reclaimed for Golf Courses
Abandoned golf course
(Pulau Redang, Berjaya
Redang Resort) due to
shortage of fresh water
supply
N
EW
SKawasan Hutan Paya Bakau 2005
Kawasan Hutan Paya Bakau Hilang 1989-2005
#
Padang Golf
#
Getah#
Tasik Buatan Padang Golf
#
Padang Golf-Lapangan KapalTerbang
Buggy path cutting
through mangrove
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Destruction of the Mangrove ~ Agriculture
Bujang River, Kedah
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Destruction of the Mangrove ~ Aquaculture
Prawn ponds, Sungai Dedap,
Kedah
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White spot disease in Tiger prawn ( Paneaus monodon)
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Weed Invasion-Piai raya (Acrostichum aureum)
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Destruction of the Mangrove ~ Housing / Development
Lapangan Terbang Antarabangsa
Pulau Pinang
• Land reclamation
•Jetty / port
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Oil & Mangrove DON’T MIX!
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Penaga
Batu Kawan
Juru
Seberang Perai Selatan
Teluk Kumbar
Balik Pulau
Batu Maung
Pulau Pinang
Kawasan Paya Bakau
N
EW
S
Kawasan Hutan Paya Bakau Pulau Pinang
Mangrove coverage in
Pulau Pinang
40 km2 (1960) – 15 km2 (2000)
Lost ~60%
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Many post-tsunami planting efforts failed
(<10% success rate, IUCN, 2006).
Mangrove restoration project at the Penang
tsunami-impacted site near Sungai Burung
had successful rate < 5%.
Importance of replanting the right species
at the right place.
Replanting - High
Failing rate!
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Mangrove restoration –
choices of species
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Site Selection
Type of substrate. (mud,rocky/coralline,sandy or
muck)
Current species present.
Presence / absence of seagrass.
Tidal Height.
Extent of wave action.
Presence / absence of pests.
Historical users of the area.
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What you can do?
Alert authorities when come across mangrove
forest clearing : MPPP website
(aduan.mppp.gov.my/complaint_eng.html)Jab
atan Alam Sekitar, Jabatan Perhutanan Pulau
Pinang, MNS, media (newspaper).
Take photos and record down the location, time
& date.
Tell your friends about the importance of
mangrove.
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Thank You