This is the third and final article in a special series on microplastics in the Amazon. Read the first story here and the second story here. MANAUS, Brazil — Traveling by boat up the Negro River from Amazonas state capital Manaus, it takes eight to nine hours to cover the 100 kilometers (62 miles) to Anavilhanas National Park. This protected area preserves one of the world’s largest freshwater archipelagos, comprising more than 400 islands and 60 lakes. They include Prato Lake, which is about 3.5 kilometers (about 2 miles) long and 1.5 kilometers (nearly 1 mile) wide. Yet, even here, in a protected area far from urban pressures, microplastics were found in the digestive tracts of fish. A recent study found an average concentration of 0.25 particles per liter of microplastics in the waters of Prato Lake. The particles were also present in the fish analyzed, regardless of their feeding habits, averaging 3.3 particles per individual. In total, about eight out of every 10 fish contained microplastics, despite living in a preserved area far from urban centers. “As a result of the entire connectivity dynamic that exists between aquatic environments in the Amazon, plastic is found even in the most remote places,” said co-author of the study Adalberto Val, a biologist from the National Institute of Amazonian Research (INPA). Plastic’s likely journey begins long before it reaches the lake. Most of the particles found in the fish consisted of filaments of polyamide, also known as nylon, alongside fragments of materials…This article was originally published on Mongabay