Alpine temporary ponds as overlooked sinks of anthropogenic macrolitter

Temporary ponds represent fragile habitats that host species of high ecological and conservation interest. High-altitude ponds, although often considered pristine environments, may instead act as important sinks for anthropogenic macrolitter. This study, conducted in eight temporary ponds at Nufenen Pass (Switzerland, 2478 m a.s.l.), aimed to assess the abundance and characteristics of anthropogenic macrolitter in these habitats, focusing on key aspects such as polymer type, origin, shape, size,