Abstract Diatom highly branched isoprenoid (HBI) lipids have proven extremely useful as environmental proxies. This study is the first to target the influence of nutrient limitation on HBI synthesis and to present data on the variable biosynthesis of HBIs in sea ice diatoms. In doing so, we show that the cellular abundance of HBIs can vary, by orders of magnitude, within the sea ice habitat; a topic not yet addressed in the literature, which could have far-reaching consequences on how variable HBI concentrations are interpreted in the wider environment.

中文翻译：

---

养分有效性对北极海冰硅藻HBI脂质合成的影响

摘要 硅藻高度支化类异戊二烯 (HBI) 脂质已被证明是非常有用的环境代理。本研究首次针对营养限制对 HBI 合成的影响，并提供有关海冰硅藻中 HBI 可变生物合成的数据。在这样做时，我们表明 HBI 的细胞丰度可以在海冰栖息地内按数量级变化。一个尚未在文献中讨论的主题，这可能会对如何在更广泛的环境中解释可变的 HBI 浓度产生深远的影响。