生態学的化学量論による植物プランクトンと細菌群集との相互作用の検討

在本研究中，生长速率假说(GRH)不适用于小球藻这一绿藻在N饥饿条件下的生长。事实上，研究表明，在低营养水平下，生物对氮的需求高于对磷的需求。这表明磷饥饿下氮、蛋白质和生物量之间的因果关系可能不同于先前的假设。我们的结果表明，在低营养条件下，N而不是P将是限制浮游植物生长的主要元素。如果这一现象适用于所有浮游植物物种，则可以有效地控制水生生态系统中的浮游植物生物量，并可以通过强调一种特定的营养物质来改善浮游植物水华的生物量管理。

In the present study, the growth rate hypothesis (GRH) was demonstrated to be inapplicable for Chlorella vulgaris, a type of green algae, under N starvation. In fact, the research showed that under low nutrient levels, the organism had a higher requirement for nitrogen than phosphorus. This suggests that the causality of nitrogen, protein, and biomass under phosphorus starvation may be different from what was previously assumed. Our results indicated that N, rather than P, would be the primary element limiting phytoplankton growth under low-nutrient conditions. If this phenomenon is applicable for all phytoplankton species, it could be valid for controlling phytoplankton biomass in aquatic ecosystems, and could improve biomass management of blooming phytoplankton by emphasizing a specific nutrient.