Many coastal processes are regulated by day/night cycles and are expected to be altered by Artificial Light at Night (ALAN). The goal of this study was to assess the influence of ALAN on the settlement rates of intertidal barnacles. A newly designed settlement plate equipped with a small central LED light source was used to quantify settlement rates in presence/absence of ALAN conditions. “ALAN plates” as well as regular settlement plates were deployed in the mid rocky intertidal zone. Both ALAN and control plates collected early and late settlers of the barnacles Notochthamalus scabrosus and Jehlius cirratus. Early settlers (pre-metamorphosis cyprids) were not affected by ALAN. By contrast, the density of late settlers (post-metamorphosis spats) was significantly lower in ALAN than in control plates for both species, suggesting detrimental ALAN impacts on the settlement process. The new ALAN plates represent an attractive and alternative methodology to study ALAN effects.

许多沿海过程受昼/夜周期的调节，并有望通过夜间人工照明（ALAN）进行更改。这项研究的目的是评估ALAN对潮间带藤壶的沉降速度的影响。配备有小型中央LED光源的新设计的沉降板用于量化是否存在ALAN条件下的沉降速率。“ ALAN板块”以及常规的沉降板块都在中部岩石潮间带部署。ALAN和对照板均收集了藤壶Notochthamalus scabrosus和Jehlius cirratus的早期和晚期定居者。早期定居者（变态前的塞浦路斯）不受ALAN的影响。相比之下，两个物种在ALAN的后期定居者（变态后的吐痰）的密度均显着低于对照板，表明ALAN对定居过程具有有害影响。新的ALAN板代表了研究ALAN效果的一种有吸引力的替代方法。