- KOREAN
- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
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Landscapes and Ecosystems of Tropical Limestone: Case Study of the Cat Ba Islands, Vietnam
Thanh Tran Duc (Institute of Marine Environment and Resources)
Huy Dinh Van (Institute of Marine Environment and Resources)
Abstract
The Cat Ba Islands in Hai Phong City, northern Vietnam, consist of a large limestone island with a maximum height of 322 m above sea level and 366 small limestone islets with a total area of about 180 km2. The islands are relicts of karst limestone mountains that became submerged during the Holocene transgression 7000 – 8000 year ago. The combination of the longtime karst process and recent marine processes in the monsoonal tropical zone has created a very diversity landscape on the Cat Ba Islands that can be divided into 3 habitat types with 16 forms. The first habitat type is the karst mountains and hills, including karst mountains and hills, karst valleys and dolines, karst lakes, karst caves, and old marine terraces. The second habitat type is the limestone island coast, including beaches, mangrove marshes, tidal flats, rocky coasts, marine notch caves, marine karst lakes, and bights. The third habitat type is karst plains submerged by the sea, including karst cones (fengcong) and towers (fengling), bedrock exposed on the seabed, sandy mud seabed, and submerged channels. Like the landscape, the biodiversity is also high in ecosystems composed of scrub cover – bare hills,rainy tropical forests, paddy fields and gardens, swamps, caves, beaches, mangrove forests, tidal flats, rocky coasts, marine krast lakes, coral reefs, hard bottoms, seagrass beds and soft bottoms. The ecosystems on the Cat Ba Islands that support very high species biodiversity include tropical evergreen rainforests, soft bottoms; coral reefs, mangrove forests, and marine karst lakes. A total of 2,380 species have been recorded in the Cat Ba Islands, included 741 species of terrestrial plants; 282 species of terrestrial animals; 30 species of mangrove plants; 287 species of phytoplankton; 79 species of seaweed; 79 species of zooplankton; 196 species of marine fishes; 154 species of corals; and 538 species of zoobenthos. Many of these species are listed in the Red Book of Vietnam as endangered species, included the white-headed or Cat Ba langur (Trachypithecus poliocephalus), a famous endemic species. Human activities have resulted in significantly changes to the landscape end ecosytems of the Cat Ba islands; however, many natural aspects of the islandsd have been preserved. For this reason, the Cat Ba Islands were recognized as a Biological Reserved Area by UNESCO in 2004.
- keywords
- Cat Ba Islands, geography, hydrography, human activities, topography
Reference
An LD. 2008. System of coastal islands in Vietnam – resources and development. Pub House of Nutural Science & Technology. Hanoi.
Historical Association of Hai Phong. 1990. Monography on Haiphong city. TI. Haiphong Pub House.
Huy DV, Thanh TD. 1991. Some geomorphological characteristics in Cat Ba National Park. Mar Res and Env Collect Res Works. Publishing House for Science and Technology, Hanoi: 19-26.
Lam DD, Boyd WE. 2002. Materials on the lower of the sea level during Middle-Late Holocene in the Hạ Long Bay. J Geol A/270: 1-7.
Lan TD, Ken LV. 2005. Marine habitat mapping for Cat Ba – Ha Long and Bai Tu Long region. Proc Nat Env Sym. Ministry of Resources and Environment, Hanoi: 1599-1604.
Thanh TD, Thinh DQ, Hoi NC, Dong NV, Huy DV. 1994. Integrated assessment of the natural potentials for tourism development of Cat Ba. Mar Res and Env Collect Res Works. Publishing House for Science and Technology, Hanoi 2: 86-92.
Thi NT. 1997. Ichthyofauna of Cat Ba Islands, Hai Phong. Mar. Res Env Collect Res Works. Publishing House for Science and Technology, Hanoi 4: 327-337.
Thu NT. 1997. Zooplankton in Cat Ba – Ha Long marine area. Mar Res and Env Collect Res Works. Publishing House for Science and Technology, Hanoi 4: 167-175.
Thung DC. 2004. Coastal marine ecosystems in Vietnam. Proc Vietnam – Italia on Biod Conser in Coastal zone. pp 55-61.
Thung DC. 2005. Scientific baselines for planning and management of Cat Ba marine protected area. Proc Nat Symp on Envr Aquatic Resourc. pp 512-524.
Nga HH, Hao NV. 1998. Ha Long in the pre-historic time. The World Publishing House, Hanoi.
Thanh TD, Waltham T. 2001. The outstanding value of geology of Hạ Long Bay. Ad in Nat 2-3: 89-99.
Thanh TD. 1998a. Landscape diversity in relation to biodiversity and some concerns in the management of coastal area of Quang Ninh. Proc Workshop on Man and Conser of Coastal Biodiversity in Vietnam, Ha Long: 21-26.
Thanh TD. 1998b. Geological history of the Ha Long Bay. The World Publishing House, Hanoi.
Thanh TD (ed). 2002. Cat Ba Biosphere Reserve Area. Technical report submitted UNESCO to recognize the Cat Ba Islands as Biosphere Reserve Area. Reserved at library of Institute of Marine Environment and Resources.
Toan NQ (ed). 1995. Geology and mineral resources of the Hải Phòng City at 1:50,000 scale. Reserved at Geological Agency, Hanoi.
Tri TV, Thanh TD, Waltham T, An LD, Anh LH 2003. The Ha Long Bay World Heritage: Oustanding geological values. J Geol Series B 22: 1-18.
Waltham T. 2000. Karst and caves of Ha Long Bay, a World Heritage Site of international significance. Intern Caver 2000: 24-31.
Yet NH, Ken LV, Ngai ND. 2007. Changing in species composition of reef coral building in Cat Ba Islands, Hai Phong. Pro Nat Symp on Basic Studies in Life Sci 317-220.
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