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.

从溪流中羽化飞出的昆虫，是岸边食虫生物（如蜘蛛）的关键食物资源。然而，水体中的化学污染会对这类昆虫以及依赖其生存的蜘蛛造成影响。本研究针对暴露于不同程度废水与农药污染的溪流周边蜘蛛的饮食结构变化展开了调查。研究结果显示，污染程度较高的溪流周边，飞行昆虫群落仅出现轻微改变，但蜘蛛的摄食偏好发生了偏移：更多取食蠓虫，而其他蝇类的摄食量有所减少。该结果表明，溪流污染可诱导食物网结构发生变化，这一影响同样波及陆生生物。