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LAKE POSO |
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+Lake
Poso is situated in Central Sulawesi close to Sulawesi
"Highway". It drains through the Poso river to the Molucca Sea. There
are also reasonable tourist facilities. Poso lake with its over 400 meter depth
was weakly stratified (RTR 13.3). The lower hypolimnion was anoxic, but the
carbon dioxide concentrations did not exceed 5.3 mg/l. Otherwise the lake was
like an "average" Indonesian lake, and the total nitrogen
concentrations were from 0.240 to 1.090 mg/l N and total phosphorus
concentrations from undetectable to 0.040 mg/l P. The chlorophyll a
concentration was 0.28 mg/m3 and biomass 0.03 mg/l. The lake seems to
be oligotrophic, and transparency was of 4.8 meters. It has a good stock of
silver and yellow eels and two endemic fish species, Adrianichtys kruyti
and Xenopoecilus poptae species, and the dominant algal species were Coccomyxa
confluens and Kirchneriella contorta (Hehanussa 1994), but in July
1993 the diatom Aulacoseira sp. dominated. There are also some
observations of 1992-1993 made by Hartoto (1994), but unfortunately they were
not available.
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