Supplementary Information, Supplementary Tables, R Code, FASTA file and OTU tables from DNA metabarcoding, additional data tables for the publication "Shift in diet composition of a riparian predator along a stream pollution gradient" by Huszarik et al. 2024, doi:10.1098/rspb.2024.2104

Flying insects that emerge from streams are important food sources for insectivores living on the shore, such as spiders. However, chemical pollution present in the water can affect these insects and the spiders relying on them. In this study we investigated changes in the diet of spiders near streams exposed to different levels of wastewater and pesticide pollution. We found slight changes in the flying insect community, and found that spiders consumed more midges and fewer other flies at more polluted streams. This shows that effects of stream pollution can induce changes in the food web, including for terrestrial organisms.

从溪流中羽化的飞行昆虫，是河岸食虫类动物（如蜘蛛）的关键食物来源。然而，水体中存在的化学污染会对这类昆虫以及依赖其生存的蜘蛛产生影响。本研究针对暴露于不同水平废水与农药污染的溪流周边蜘蛛的饮食变化展开了调查。研究发现，飞行昆虫群落仅出现轻微改变，且在污染程度更高的溪流区域，蜘蛛会更多地取食蠓科昆虫，而更少捕食其他蝇类。该结果表明，溪流污染可诱导食物网发生变化，其中亦涵盖陆生生物所在的食物网。