Wantasen, Sofia and Manueke, Jusuf
(2012)
KONSENTRASI KHLOROFIL-a DI DANAU TONDANO PROVINSI
SULAWESI UTARA.
Jurnal Ilmiah BIO-Science, 1 (1).
pp. 60-71.
ISSN 2301-4504
Abstract
The Purposes of this study was to study the chlorophyll-a concentration in Tondano Lake.
Location of chlorophyll-a sample were at horizontal and vertical on the surface Tondano Lake, a depth
of I meter, a depth of 2 meters and a depth of 3 meters. Chlorophyll-a -point sampling is a vertically
related to the ability of light penetration for photosynthesis is to a depth of 3 meters and plant
distribution patterns in lake water vertically Tondano.
Chlorophyll-a sampling done using Stick Water Sampler. Analysis methods for to determination chlorophyll-a is Spectrophotometric method by extracting pigments first. Chlorophyll-a pigment extracts using acetone solution, using an opaque wrapper or alluminium foil. Pigments that
have been extracted from plankton concentrations determined by using a Spectrophotometer (APHA,
2005).
The results of laboratory analysis showed that the concentrations of Chlorophyll-a highest in
a depth of 3 meters 26, 77 μg/I. This showed that higher concentrations of chlorophyll-a at a depth of 3
meters at Tondano Lake caused by high organic matter at a depth of 3 meters and light factors. The
brightness level of Tondano Lake around 2.5-3 meters of solar radiation can thus to a depth of 3
meters and is supported by the availability of nutrients has gone well so photosynthesis phytoplankton
growth increases at a depth of 3 meters.
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