Study of CO2 budget and ecosystem in the western North Pacific

为了评估亚北极太平洋西部海域的CO2收支和生态系统，采用浮游植物色素分析和细胞计数等方法，观测了浮游植物丰度的季节变化，以了解亚北极太平洋西部钏路海域上层浮游植物丰度的生理影响。在浮游植物组合中，硅藻（较大的细胞大小）在全年的色素测量中最为丰富，尽管从细胞数量上看，绿藻（较小的细胞）占主导地位，特别是在近海。这表明，由于绿藻对低温的偏好，近岸地点的水温低于近岸地点。表层碳收支的季节变化将在不久的将来进行估计，因为我们的整个样本的细胞计数尚未完成。

In order to evaluate CO2 budget and ecosystem in the western subarctic Pacific, seasonal change s in phytoplankton abundance were observed by means of phytoplankton pigment analysis and cell-count to understand the physiological influences on the abundance in the upper layer off Kushiro, western Subarctic Pacific. Diatoms (larger cell size) were most abundant in the phytoplankton assemblage measured by pigments throughout the year although chrysophytes (small sized cell) were become dominant by cell-count particulary at offshore site. This reveals that water temperature was lower at offshore site than the coastal site because of low temperature preference of chrysophytes.Seasonal changes in the carbon budget in the surface layer will be estimated near future because cell count is not completed yet on our whole samples.