Diatom-bacteria interactions: deciphering impacts on algal bloom regulation and toxicity

海洋浮游植物对调节全球气候至关重要，贡献了生物圈近一半的净初级产量。硅藻是最重要的浮游植物群之一，产生的有机碳与所有陆地雨林的总和一样多。硅藻形成空间广泛的水华，对生物地球化学循环和支撑生态系统产生全球范围的影响。由于释放有害毒素，一些硅藻华也会对海洋生态系统和渔业产生负面影响。硅藻与捕食者、寄生虫、竞争对手和共生体的生物相互作用对天然硅藻种群有着深远的影响，是调节藻华动态和潜在毒性的重要因素。尽管这种相互作用对硅藻生态学和海洋生态系统功能具有明显的重要性，但对硅藻用于识别和响应其他微生物或ii)调节有害毒素产生的机制知之甚少。为了更好地了解控制硅藻华形成和毒性的因素，这些表明需要解决重要的知识空白。

Marine phytoplankton are vital in regulating our global climate, contributing almost half of the biosphere's net primary production. Diatoms are one of the most important phytoplankton groups, generating as much organic carbon as all terrestrial rainforests combined. Diatoms form spatially extensive blooms that exert global-scale influences on biogeochemical cycles and underpin ecosystems. Due to the release of harmful toxins, some diatom blooms can also have a negative impact on marine ecosystems and fisheries.The biotic interactions of diatoms with predators, parasites, competitors and symbionts, can profoundly influence natural diatom populations, and are an important factor regulating bloom dynamics and potential toxicity. Despite the clear importance of such interactions for diatom ecology and marine ecosystem functioning, little is known about the mechanisms diatoms employ to i) recognise and respond to other microbes, or ii) regulate production of harmful toxins. These represents important knowledge gaps that need to be addressed, in order to better understand factors governing diatom bloom formation and toxicity.