S1b是一株篩選自臺灣沿岸的海洋微藻。18S rDNA的親緣分析以及型態鑑定結果認定其為Picochlorum sp.。培養條件分析結果顯示，其在鹽度30~60 ‰、弱酸pH 5.0~6.4、以及添加有機碳、氮源的條件下生長速率較快。在20 L蒸餾水桶使用最佳生長條件進行培養時 (打氣量設訂在0.1 vvm、光照照度為3,000 Lux、光照時間為每日12小時、鹽度35 ‰、溫度27 °C、酵母萃出物及葡萄糖濃度分別為4.5及6.0 g L-1)，其密度可於七天內由初始的0.05 g L-1快速增加到2.50 g L-1，具有量產的潛力。
在以S1b投餵極小型壺形輪蟲 (Brachionus sp.) 時，發現輪蟲的增殖率及帶卵率分別可達0.54 ± 0.05以及0.35 ± 0.10，與東港水試所的擬球藻分析結果0.58 ± 0.04以及0.27 ± 0.11並無顯著差異。進一步分析S1b的營養成分，發現其蛋白質高達乾重的55.3 %，因此有利於輪蟲的培養，然而在維生素B12的含量，S1b為0.62 ppm，低於文獻中最佳的輪蟲藻餌– Tetraselmis chuii的1.92 ppm，可能是影響其培養效果的原因。後續可進一步地研究能否透過添加維他命B12至培養基中，達到滋養S1b以改善其培養輪蟲的效果。

S1b, an algal strain isolated from the coastal area of Taiwan, was identified as Picochlorum sp. based on both phyogenetic ananlysis of 18S rDNA and morphological characterization. The cultivation studies showed it could grow well at salinity between 30 and 60 ‰, at pH ranging from 5.0 to 6.4, with supplements of organic carbon and nitrogen sources. When S1b was cultivated in a 20 L-carboy with 0.1 vvm aeration, 3,000 Lux illuminance supplied as 12 hours per day, and 10 L medium containing 4.5 g L-1 yeast extract and 6.0 g L-1 glucose prepared by seawater, it could grow from 0.05 g L-1 up to 2.50 g L-1 within a week, revealing the probability for producing the alga in industrial scale.
When S1b was fed to super small-sized strain of rotifer (Brachionus sp.), the egg ratio and reproductive rate could achieve 0.54 ± 0.05 and 0.35 ± 0.10 respectively, which were no less than 0.58 ± 0.04 and 0.27 ± 0.11, the egg ratio and reproductive rate obtaining by feeding rotifer with Nannochloropsis oculata. The results of nutrition analysis showed the S1b has very high protein content (55.3 % dry biomass) but low vitamin B12 content, which could be the reason why S1b is worse than Tetraselmis chuii for growing rotifers. More work is needed to see if the S1b enriched with vitamin B12 performed better for growing rotifers.

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