ALAN effects on coastal phytoplankton

Artificial light at night (ALAN) is increasingly recognised as a disruptive form of environmental pollution, impacting many physiological and behavioural processes that may scale up to population and community-level effects. Mounting evidence from animal studies show that the severity and type of the impact depends on the wavelength and intensity of ALAN. This knowledge has been instrumental for informing policy-making and planning for wildlife-friendly illumination. However, most of this evidence comes from terrestrial habitats, while research testing alternative wavelength illumination in marine environments is lagging behind. In this study we investigated the effect of such alternative ALAN colours on marine primary producers. Specifically, we tested the effect of green, red, and natural white LED illumination at night, compared to a dark control, on the growth of a green microalgae as well as the biomass, diversity and composition of a phytoplankton assemblage. Our findings show tha...夜间人工光（Artificial Light at Night, ALAN）正日益被视为一种具有破坏性的环境污染形式，可干扰众多生理与行为过程，其影响可拓展至种群与群落层面。越来越多的动物研究证据表明，其影响的严重程度与类型取决于ALAN的波长与光照强度。这类研究成果可为制定野生生物友好型照明的政策与规划提供重要依据。然而，此类证据大多来自陆地生境，而针对海洋环境中替代波长照明的研究仍相对滞后。本研究探究了这类新型夜间人工光色对海洋初级生产者的影响。具体而言，相较于黑暗对照组，本研究测试了夜间绿色、红色与天然白色LED照明对一种绿色微藻的生长，以及浮游植物群落的生物量、多样性与群落组成的影响。本研究结果显示……