We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Microplastic Pollution in High-Elevation Water Bodies of the Serra da Estrela Mountain Range, Portugal
AI summary Read the abstract
Scientists found tiny plastic particles (microplastics) in every single lake and stream they tested in a remote Portuguese mountain range—even in water bodies far from cities or major pollution sources. The plastic levels were higher near ski and tourist areas right after the snow season, suggesting human recreation is leaving lasting plastic residue even in pristine natural environments. This matters because these mountain waters are drinking water sources for surrounding communities, showing that microplastic pollution—and the potential health risks that come with ingesting it—can reach even the places we think are furthest from human impact.
Abstract Microplastics—synthetic particles ranging in size from 1 μm to 5 mm—are now widely recognised as an emerging environmental issue due to their ubiquity across ecosystems. While most research has focused on marine environments, important knowledge gaps remain regarding their occurrence in freshwater systems, particularly in remote and high-altitude ecosystems. Given the increasing human use of these environments, understanding potential sources and drivers of contamination is crucial. This study assessed and characterised microplastic pollution in high-elevation water bodies from Serra da Estrela during two sampling campaigns (June and November 2023). Eight water bodies were sampled, with surface water and sediment collected. Suspected particles were isolated, quantified, and characterised according to size, shape, colour, and polymer type using micro-FTIR and FTIR-ATR spectroscopy. Differences between sampling periods and the influence of human presence were also evaluated. Microplastics were detected in all sampled water bodies. A total of 1338 particles were identified, with average concentrations of 0.35 particles L⁻ 1 in water and 48.2 particles kg⁻ 1 dry weight in sediments. Most particles were larger than 300 μm, with a detection limit of 100 μm. Spectroscopic analyses showed that polypropylene (PP) and polyethylene (PE) were the dominant polymers. Concentrations were higher in June than in November and were associated with proximity to areas of greater anthropogenic activity, likely reflecting the residual impact of winter recreational activities during the snow period. This is the first report on microplastic pollution in the highest mountain range in continental Portugal. Further monitoring is needed to preserve water quality and support conservation of these high-altitude ecosystems.
More Papers Like This
Microplastic pollution and ecotoxicological risk in high-altitude glacial lakes of Durmitor, Montenegro
AI summary Read the abstract
Scientists found tiny plastic particles (microplastics) even in remote, protected glacial lakes high in the mountains of Montenegro—places you'd expect to be pristine and untouched by pollution. This matters because it shows plastic pollution can travel far from cities and factories, likely carried by tourists, wind, or water, meaning there may be no truly "clean" freshwater sources left untouched by plastic contamination that could eventually enter drinking water supplies or food chains.
From Mountains to the Coast: Microplastics in Slovenian Karst Alpine Lakes and Drinking-Water Sources—Implications for Sustainable Water-Resource Management
AI summary Read the abstract
Scientists found tiny plastic particles (microplastics) in remote alpine lakes and springs in Slovenia, including two springs that supply drinking water to 120,000 people during tourist season. Even protected, pristine-seeming mountain areas aren't free from plastic pollution, meaning these particles could end up in the water we drink. More research is needed to understand how microplastics move through these water systems and how to protect drinking water supplies.
Microplastic contamination in remote mountain lakes of the americas: a baseline assessment from Patagonia and Northern California
AI summary Read the abstract
Scientists found tiny plastic fibers and fragments in remote mountain lakes across Patagonia and Northern California—even in places far from cities, roads, or heavy tourism. This suggests microplastics are traveling through the air and water systems on a massive scale, not just leaking from nearby trash or pollution, meaning there may be no truly "untouched" water left on Earth. Since these lakes often feed into drinking water supplies, the findings are a reminder that microplastic exposure is becoming a global, unavoidable issue rather than just a local problem.
First evidence of MPs in remote high mountain lakes of Sierra Nevada, Spain
AI summary Read the abstract
Microplastics were found in remote high mountain lakes in Sierra Nevada, Spain, far from any direct human source, confirming that atmospheric deposition can carry plastics to pristine alpine environments. Nearby lakes showed differences in microplastic concentrations and types, likely reflecting local wind patterns and catchment characteristics. The study demonstrates that altitude and distance from urban areas do not protect freshwater ecosystems from microplastic contamination.
Investigating the Occurrence of Riverine Microplastic Pollution in Western Himalayan region
AI summary Read the abstract
Scientists found tiny plastic particles called microplastics in rivers throughout the western Himalayan mountains, even in remote areas far from cities. These microscopic plastic pieces are flowing downstream from high mountain areas toward lower regions where millions of people get their drinking water. This matters because microplastics can potentially harm human health when they get into our water supply, and this study shows that even pristine mountain areas aren't safe from plastic pollution.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.