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KMID : 1024519980070010112
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Journal of the Environmental Sciences
1998 Volume.7 No. 1 p.112 ~ p.115
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Evaluation of Exposure Times for Periphyton Biomass Estimate using Artificial Substrata in Headwater Streams
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Kim Hyun-Woo
Ha Kyong
Joo Gea-Jae
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Abstract
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During the spring and fall of 1994 and winter of 1995, the exposure time of periphyton biomass on terval. In the streams with low periphyton biomass (chi. a: 2-4 mg/) in natural rocks, biomass of arttificial substrata (unglazed tile: ) exceeded that of the natural rocks after 28 days, while sites with high biomass (chi. a: 20-60 mg/) in natural rocks showed slower biomass accumulation after 40 days. Due to the high licht input and temperature in a Partially shaded mountain stream, development of periphyton biomass in spring occurred faster than that of winter. In general, development of periphyton biomass placed on artificial substrata took 4-5 weeks in spring and at least 6 weeks In winter to reach the natural level.
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KEYWORD
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colonization, artificial substrata, periphyton, headwater streams
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