Ting Kok Mangrove summary

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Ting Kok Mangrove - summary
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I) General Zonation Pattern of Mangroves
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Questions
Can you observe any special features that enable
Kandelia to gain firm anchorage in the muddy
substratum?
Look at other mangrove tree species e.g. Black
Mangrove (Avicennia marina), what other
adaptations for anchorage can you see?
What is the significance of pneumatophores to
Black Mangrove?
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Questions
Locate the mangrove tree Aegiceras (Aegiceras
corniculatum). Look carefully at the leaf
surface, can you find any liquid or white
crystals on the surface? What are they? What is
the significance of this?
Locate Lumnitzera (Lumnitzera racemosa), touch
the leaves to feel their thickness and observe
the cuticle (break the leaf to do this). Can you
suggest why the leaves should be so succulent
(thick) and have such a thick cuticle?
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Mangrove associated fauna (animals)
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YSCN 0024 Ecology Biodiversity Field Course
Conservation of Mangroves

• The threats to mangroves
• Habitat destruction
• Pollution
• Invasive species
• Sedimentation
• Sea-level rise?

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Habitat destruction
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Water pollution
Credit WWFHK
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Invasive species
Sonneratia species
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Sedimentation e.g. Deep Bay

• Accretion rate about 3 cm/year,
• Mangroves extending out into
• Deep Bay at some 15 -20 m/year,
• Questions
• - Source of sediments?
• - Past sedimentation patterns
• - Future predictions
• - Implications for the Ramsar Site

? Ming Pao Newspaper (17 November 2002)
Credit
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Mangrove seedling clearance from the mudflat
Credit
Sea level rise?
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References Lee, S.Y. 2002. Forest in the Water.
Friends of the Country Parks and Cosmos Books
Ltd Hong Kong. Tsim, S.T. and lock, F.N.Y. 2002.
Knowing Ramsar Wetland. Friends of the Country
Parks and Cosmos Books Ltd Hong Kong. Tam,
N.F.Y. and Wong, Y.S. 2000. Hong Kong Mangroves.
City University of Hong Kong Press Hong Kong.