MANAUS, Brazil — On June 20, a 50-member team led by NGO Asas de Socorro and Rede Reviva walked about 1.5 kilometers (1 mile) along the shoreline of the Puraquequara Lake in eastern Manaus during a garbage-collection effort. When the activity finished covering a stretch of beach on a lake with a water surface estimated at 20-25 km2, the group had gathered a dumpster full of plastic waste. A similar effort in June 2023 had collected two dumpsters. The group’s experience helped illustrate the results of Eletuza Uchôa Farias’s master’s research: Half of the fish collected at the lake, from two jaraqui species (Semaprochilodus insignis and Semaprochilodus taeniurus), had ingested microplastics. Once inside an organism, the particles can remain in the intestinal tract, reach other tissues and organs, and move through the food chain — from the base to predatory fish — potentially ending up in humans. The jaraqui is the most consumed fish in Amazonas state. All particles found in the fish intestines were fibers: 0.5-4.37 millimeter-thin, elongated filaments. Most of them — 85.7% — were identified as polyamide, a polymer widely used by the textile industry for its strength and flexibility. The Puraquequara’s surroundings are home to communities with no effective basic sanitation. Water from sinks, tanks and washing machines is dumped directly into water bodies, which may explain the presence of polyamide that reach the jaraquis — which, in turn, end up on the plates of Amazonian residents. The Puraquequara case serves as a snapshot of plastic contamination in the Amazon. While microplastics are extensively…This article was originally published on Mongabay