| Summary: | 碩士 === 國立臺灣大學 === 生物環境系統工程學系暨研究所 === 91 === Due to watching glowworms has become a very popular leasure activity and enjoyed by many people in Taiwan. Besides, the number of glowworms could be an indication of the amount of environment pollution in suburban areas. The glowworm is worth to rebreed .
The Luciola SP appearing in Taipei suburban areas is the target species in this study.We selected the Deng-feng Jiun,an irrigation ditch preparing
to rebreed glowworms in the future, as an experiment station . Three of
the comparative stations were selected to compare with the experiment station. One of them was a rebreeded canal located on the Huu-shan Chi, and the others were small creeks located on the Shen-jen Waterfall and the Pin-ding-guu Jiun respectively. The meteorological phenomena, water quality, bed quality and hydraulic condition of all stations were observed in summer and winter respectively, and were analyzed by the physical habitat simulation system model as well as compared with the data obtained from scientific literature. We found that all the measurements observed from the experiment station was suitable for the target species to exist in water habitat except flow velocity exceeded its limit. In order to reduce flow velocity we chose two kinds of ecological workingmethod
,drop and side slope protected by planting herbage, to make an experiment
. It was known that the suitable velocity for the Luciola SP to exist in water habitat was from 10 to 30 cm/sec. All methods in this experiment could reduce flow velocity ,however, the method of bed protected by planting herbage which got the above suitable velocity data more than 75 %, obtained the best results of flow reducing. Thus, it is necessary to use ecological working methods to improve the habitat and flow velocity of current agricultural waterways, if we hope to rebreed the Luciola SP in Taipei suburban areas.
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