Abstract:
Sediment sampling covered Bangpakong River Mouth to Srilacha and Sichang island from August 1995 August 1996. The top 2 cm. of non destroyed structure sediment by speical corer was divided into two part. One was sonicated with high resolution microscop. The other was incubated in test tube filler seawater (from the sampling) incubated for 1 day and check seawater above under high resolution microscope. The new filter seawater was changed daily and continuous monitoring for 5 days. The result was that Phaeopolykrikos sp. cyst cyst was round shape covered with tiny spine was the most frequency and abundant. The appearance of dinoflagellate cysts were dominant in Bangpakong River Mouth. especially in January 1996 or winter season. And the frequency of dinoflagellate cyst was only 6.6-40.0% of total samples. In this studied the cultured method was better than the sieving method.