海洋初级生产光动力学及产品结构

焦念志; 王荣

海洋初级生产光动力学及产品结构

焦念志,
王荣

中国科学院海洋研究所, 青岛

基金项目: 国家自然科学基金资助项目,编号:39200022.

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- 文章访问数: 763
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- 被引次数: 0
出版历程
- 收稿日期: 1993-02-25
- 修回日期: 1993-10-08

摘要

摘要: 运用¹⁴C同位素示踪方法现场研究了胶州湾四个季节浮游植物自然种群初级生产的光动力学特征和光合产品中颗粒有机碳(PPOC)和溶解有机碳(PDOC)的比例。结果表明,在冬、春季,网采浮游植物(Netphytoplankton,简记为Net-)和毫微型浮游植物(Nanophytoplankton,简记为Nano-)具有相对较小的光合半饱和常数(K_I),而在夏、秋季,微微型浮游植物(Picophytoplankton,简记为Pico-)具有更小的K_I.¹⁴C理论最大光合速率(P_m),在任何季节都是:Pico- >Nano- >Net-.P_m/K_I的季节变化为夏季>秋季>春季>冬季,表明光合效率具有同样的季节变化顺序。P_m/K_I在不同粒级类群间的顺序为Pico- >Nano- >Net-,可见,浮游植物细胞越小,对光能的竞争力越强。光合过程中PDOC的释放主要受光控制,太强和太弱的光均会使光合产品中PDOC的比例升高,但除光抑制情况之外,PDOC的绝对释放量随光强增加而增加。
- 初级生产力 /
- 光合溶解有机碳 /
- 粒级

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