We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Lakes with or without urbanization along their coasts had similar level of microplastic contamination, but significant differences were seen between sampling methods
AI summary Read the abstract
Researchers compared microplastic contamination across six Patagonian lakes with and without urban shorelines and found similarly high contamination in all lakes regardless of urbanization, strongly suggesting atmospheric deposition as the dominant transport pathway, while also revealing that sampling method (bottle vs. net) can produce results differing by more than 3,000-fold.
The influence of sampling method on microplastic (MP) quantification and the impact of population density on the levels of MP contamination in surface waters from Patagonian lakes were investigated. Six lakes located in Northern Patagonia (Argentina) were studied using two different sampling protocols widely reported in the literature: water collected in glass bottles vs. water collected using a 50 μm mesh size net. To assess the influence of population density on MP contamination, lakes with urbanization at shores (Nahuel Huapi, Gutierrez and Moreno) and lakes without urbanization on their shores (Espejo, Espejo Chico and Mascardi) were considered. We identified contamination with secondary MP at all the freshwater lakes studied, with predominance (>90 %) of textile-based microfibers (MF). Remarkably the levels of contamination were similar in all the lakes, independently of whether they were impacted by urbanization along their coasts or not, which supports the notion that there is atmospheric transport of MP. The greatest variability found was among sampling methods, with differences above of three orders magnitude. Samples collected directly in 1-l bottles had an average of 5257 MP/m in comparison to 1.57 MP/m in the samples that were collected with a 50 μm net. Interestingly, Nahuel Huapi lake samples collected with bottles where the WWTP discharges effluents were significantly more contaminated (SD 9400 ± 4351 MP/MF per m) than samples collected 5 km west of the plant (2100 ± 1197 MP/MF per m). Results highlight the significance of textile microfibers as microplastic contaminants of freshwater, and the need to address mesh size when looking for textile microfibers and to develop standardized sampling protocols to make studies on freshwater MF contamination comparable.
More Papers Like This
A comparative review of microplastics in lake systems from different countries and regions
AI summary Read the abstract
Researchers reviewed microplastic contamination data from lake systems across multiple countries, finding that abundance, size, and polymer type varied widely by region and identifying land use, population density, and hydrological connectivity as key drivers of lake microplastic levels.
Variability of microplastic loading and retention in four inland lakes in Minnesota, USA
AI summary Read the abstract
Researchers measured microplastic levels in four small lakes in Minnesota and found that watershed size and urban development were the biggest factors driving contamination. Surface water concentrations varied widely, and sediment levels did not directly correlate with what was found in the water above. The study highlights how local land use patterns influence where microplastics end up in freshwater ecosystems.
Effect of urbanization and water quality on microplastic distribution in Conceição Lagoon watershed, Brazil
AI summary Read the abstract
Researchers assessed microplastic distribution across urbanized and non-urbanized tributaries of Conceicao Lagoon watershed in Brazil. The study found that while urbanization significantly affected water quality parameters, it did not always correspond to higher microplastic concentrations. Evidence indicates that microplastic pollution in freshwater systems is influenced by multiple factors beyond urbanization alone, complicating simple predictions about contamination patterns.
High-levels of microplastic pollution in a large, remote, mountain lake
AI summary Read the abstract
Researchers discovered high levels of microplastic pollution in a large, remote mountain lake, finding concentrations comparable to lakes in densely populated areas, suggesting that atmospheric deposition can deliver substantial microplastic loads to even isolated environments.
Prevailing wind patterns influence the distribution of plastics in small urban lakes
AI summary Read the abstract
Researchers studied the distribution of plastic pollution across 20 urban lakes and found that prevailing wind patterns significantly influence where plastics accumulate. The study found that macroplastics and microplastics were 1.7 and 3 times more abundant along northern shorelines respectively, demonstrating that wind-driven transport is an important factor in the heterogeneous distribution of plastic pollution in lake environments.
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.