Spring and autumn living coccolithophores in the Bohai Sea and Yellow Sea, China
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摘要: 今生颗石藻是浮游植物功能群中一类重要的钙化生物,也是海洋生物无机碳的主要生产者,在海洋碳循环中扮演重要的角色。本文主要对春秋两季今生颗石藻的丰度、物种组成和环境参数之间的相关性进行研究,期望厘清黄渤海今生颗石藻的生态学功能。在春季,用偏光显微镜×1000放大倍率共鉴定出颗石藻9种。优势种是赫氏艾密里藻(Emiliania huxleyi),大洋桥石藻(Gephyrocapsa oceanica),卡特螺旋球藻(Helicosphaera carteri)与细孔钙盘藻(Calcidiscus leptoporus)。颗石球和颗石粒的丰度分别介于0-7.72 cells/mL和0-216.09 coccoliths/mL,平均值分别为0.21cells/mL和11.36 coccoliths/mL。赫氏艾密里藻(Emiliania huxleyi)和大洋桥石藻(Gephyrocapsa oceanica)的分布相似。颗石球的最大丰度都在北黄海山东半岛东部,并且大洋桥石藻(Gephyrocapsa oceanica)的分布范围更广。赫氏艾密里藻(Emiliania huxleyi)和大洋桥石藻(Gephyrocapsa oceanica)是颗石藻的两个主要物种,丰度较高。颗石藻的分布和颗石粒的分布相似。在秋季,共鉴定出颗石藻14种,优势种为赫氏艾密里藻(Emiliania huxleyi),大洋桥石藻(Gephyrocapsa oceanica),卡特螺旋球藻(Helicosphaera carteri),细孔钙盘藻(Calcidiscus leptoporus)和脆弱卵石藻(Oolithotus fragilis)。颗石球和颗石粒的丰度分别介于0-24.69 cells/mL和0-507.15 coccoliths/mL,平均值分别为1.47 cells/mL和55.89 coccoliths/mL。颗石粒的最大丰度位于青岛沿岸和调查海区南部。颗石藻和颗石粒分布相似。另外,颗石藻在黄海中部以东呈现较大的丰度。Abstract: The living coccolithophores (LCs) are an important class of calcified taxa of phytoplankton functional groups, and major producers of marine biogenic inorganic carbon, playing an important role in the marine carbon cycle. In this study, we report the two-demensional abundance, composition of LCs and its correlation with the environmental parameters in spring and autumn, in order to understand the ecological role of LCs in the Yellow Sea and the Bohai Sea. In spring, totally 9 taxa belonging to coccolithophyceae were identified using a polarized microscope at the 1 000× magnification. The dominant species were Emiliania huxleyi, Gephyrocapsa oceanica, Helicosphaera carteri, and Calcidiscus leptoporus. The abundance of coccosphores and coccoliths ranged 0-7.72 cells/mL, and 0-216.09 coccoliths/mL, with the average values of 0.21 cells/mL, and 11.36 coccoliths/mL, respectively. The Emiliania huxleyi distribution was similar to Gephyrocapsa oceanica. The highest abundance of coccoliths was observed in the east of Shandong Peninsula in northern Yellow Sea, whereas Helicosphaera carteri distributed more widely. Emiliania huxleyi and Gephyrocapsa oceanica were the two predominant species in LCs with higher abundances. The distribution of LCs was similar to that of coccoliths. In autumn, 14 taxa belonging to coccolithophyceae were identified with dominant species as Emiliania huxleyi, Gephyrocapsa oceanica, Helicosphaera carteri, Calcidiscus leptoporus and Oolithotus fragilis. The abundance of coccosphores and coccoliths ranged 0-24.69 cells/mL, and 0-507.15 coccoliths/mL, with the average values of 1.47 cells/mL, and 55.89 coccoliths/mL, respectively. The highest abundance of coccoliths was located in Qingdao coastal waters and south of the survey area. The distribution of LCs was similar to the coccoliths; in addition, LCs presented large abundance in the east of the central Yellow Sea area.
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Key words:
- living coccolithophores /
- Bohai Sea /
- Yellow Sea /
- spring /
- autumn
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