- Baram River
The Baram river is a river in
Sarawak ,East Malaysia on the island ofBorneo . The river originates in the centralIran Mountains and flows westwards through tropical rainforest to theSouth China Sea . [citebook|title=Histories of the Borneo Environment|author= Reed L. Wadley|year=2005|publisher=KITLV Press|id=ISBN 9067182540] [ [http://www.geol.lsu.edu/WDD/ASIAN/Baram/baram.htm Louisiana State University] ]The Baram river basin has been part of Sarawak since it was ceded to the
White Rajah ofSarawak by the then sultan of Brunei in 1882, an area of some convert|10000|sqmi|km2|-4, for a perpetual annual payment of 6000 dollars [ [http://explorion.net/ch.hose-w.mcdougall-pagan-tribes-borneo-1/page-228.html The Pagan Tribes of Borneo, retrieved 22-05-2007] ] .The river is crossed not far from its mouth by the
Miri-Baram Highway , Federal Route JKR|22, on theBatang Baram Bridge opened in 2003. Some 100 km upstream lies the town of Marudi.Environmental History: Tributary of the prehistoric Sunda River
During the
Pleistocene epoch orMesolithic period about 10,000 years ago, there was a 5 degrees Celsius drop in the global temperature. At mountaintops, rainfall as snow and accumulated as huge icy sheets (includingMount Kinabalu ), thus making a break in the global hydrological cycle. Due to lack of water discharge into the sea, there was a 120-meter drop of sea levels from the present time. The South China Sea dried up, exposing theSunda Shelf and previous deep trenches became huge ancient rivers called the NorthSunda River .Asian Mainland, Malay Peninsular,
Sumatra and Java became connected toBorneo via the landbridge of exposed Sunda Shelf. The North Sunda River provided vital connection toMekong River in Vietnam andChao Phraya River in Thailand to the north, Baram and Rajang rivers inSarawak to the east andPahang River andRompin River to the west of the massive land mass. Freshwatercatfish es and barbs [ [http://www.ingentaconnect.com/search/article?title=sunda+river&title_type=tka&year_from=1998&year_to=2008&database=1&pageSize=20&index=3 Article] by S. K. J. McConnell, "Mapping aquatic faunal exchanges across the Sunda shelf, South-East Asia, using distributional and genetic data sets from the cyprinid fish Barbodes gonionotus (Bleeker, 1850)" in "Journal of Natural History", Volume 38, Number 5, 2004 , pp. 651-670(20)] from those rivers migrated and mated to exchange their genetic materials about 10,000 years ago. Thus, after theHolocene , when the temperature increased, the landbridges and Sunda River were inudated and the catfish populations were isolated. However, their genetic motives are still in theDNA as an evidence of the previous connections of Baram River to other isolated rivers in Indochina and Borneo.References
External links
* [http://www.sarawak.gov.my/ Sarawak government website]
* [http://www.panda.org/heart-of-borneo/ WWF Heart of Borneo conservation initiative]
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