1 Department of Integrative Biology, University of South Florida , Tampa, FL 33620 , USA.
2 Marine Science Institute, University of Texas at Austin , Port Aransas, TX 78373 , USA.
Biol Lett. 2019 Mar 29;15(3):20180816. doi: 10.1098/rsbl.2018.0816.
Several species of large, centric diatoms exhibit an unsteady sinking behaviour characterized by order-of-magnitude oscillations in sinking speed that occur over seconds. We show that under nutrient-depleted conditions, Coscinodiscus wailesii exhibits significantly stronger unsteady sinking behaviour in the light than in the dark. Results suggest that regulating unsteady sinking in response to irradiance as well as nutrient conditions may help C. wailesii balance its requirements for light and nutrients, which are often spatially separated.
几种大型中心硅藻表现出不稳定的下沉行为，其下沉速度呈数量级波动，持续时间为数秒。我们发现，在营养匮乏的条件下，辐辏海链藻在光照下的非稳态下沉行为比在黑暗中明显增强。研究结果表明，辐辏海链藻可能通过响应光照和营养条件来调节非稳态下沉，从而帮助其平衡对光和营养的需求，因为光和营养通常是空间分离的。
