We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Vertical Distribution of Microplastics in a Deep European Lake During Thermal Stratification
AI summary Read the abstract
Scientists studying a deep lake in Greece found that tiny plastic fibers collect in a specific layer of water (called the thermocline) that forms during warm months—and this is also where a key food-chain organism, a tiny water creature called a copepod, likes to gather. Since this copepod is a favorite food of a popular commercial fish, the overlap raises concerns that plastic fibers could be working their way up the food chain toward the fish we eat. More research is needed to confirm how much of this plastic actually ends up in fish and, eventually, on our plates.
Little is known about the vertical distribution of microplastics (MPs) in deep stratified lakes. This study investigates the MPs in the large and deep Lake Trichonis during the thermal stratification period, using two nets of different porosity (50 μm and 200 μm) in three depth strata. Fibers dominated upon fragments having an average abundance of 10.63 ± 1.00 items/m3 and 3.10 ± 0.52 items/m3 respectively in the samples of the 50 μm net in the entire water column, while the respective values for the 200 μm net were 1.4 and 7.4 times greater. Fibers had highest abundance within the thermocline, and most of them were blue having length 12 mm. There were only abundance differences between the two nets and no qualitative disparities concerning color, size, shape and polymer types. There was strong positive correlation between the abundance of fibers and the adults of the dominant copepod Eudiaptomus drieschi, which accumulated also within the thermocline. Considering that the adults of E. drieschi are among the preferred prey of Atherina boyeri, the most important commercial fish, certain issues arise concerning possible fibers’ bioaccumulation on the food web. The study highlights the importance of investigating MPs in connection with biotic elements.
More Papers Like This
Vertical water column position determines density and types of microplastics in Harvey’s Lake, the largest natural lake by volume in Pennsylvania
AI summary Read the abstract
Sampling Harvey's Lake, Pennsylvania at seven depths revealed that microplastic type and abundance vary significantly with depth: large fibers dominate near the surface while non-fiber particles concentrate in bottom sediments, with 65% of microplastics attached to algae. This vertical stratification demonstrates that single-depth sampling significantly underestimates total microplastic burden in stratified lakes, with algal attachment having important implications for trophic transfer up aquatic food webs.
Laboratory and numerical investigation of the factors controlling the residence time of microplastics in the water column of thermally stratified lakes
AI summary Read the abstract
Researchers used laboratory experiments and numerical modeling to investigate how thermal stratification in lakes affects the residence time of microplastics in the water column, finding that stratification traps particles in specific depth layers. Thermally stratified summer conditions increase the likelihood that microplastics will be encountered and ingested by filter-feeding organisms at particular depths.
Vertical Distribution of Microplastics in a Deep European Lake During Thermal Stratification
AI summary Read the abstract
Scientists studying a deep Greek lake found that tiny plastic fibers collect in a specific water layer (called the thermocline) — and so do the small water bugs that fish love to eat. This overlap means plastic fibers could be getting eaten by these bugs and then passed up the food chain to fish that people catch and eat, raising questions about how much plastic might end up on our plates.
Microplastics in a deep, dimictic lake of the North German Plain with special regard to vertical distribution patterns
AI summary Read the abstract
Researchers assessed the vertical distribution of microplastics in Lake Tollense, a deep dimictic lake in northern Germany, sampling particles 63-5000 μm at surface, 7 m, and 10 m depths on three occasions. The study found that vertical distribution patterns varied with lake stratification and depth, contributing new data on how physical processes in freshwater lakes influence where microplastics accumulate.
Experimental investigation of microplastic residence times in lake systems during thermal stratification and lake turnover
AI summary Read the abstract
Mesocosm experiments in a lake showed that thermal stratification significantly affects how long microplastics remain suspended in the water column, with particles staying near the surface longer during summer stratification and sinking faster during lake turnover in fall. Residence time directly influences how likely aquatic organisms are to encounter and ingest microplastics. Understanding these seasonal dynamics is key for predicting microplastic exposure risks in lake ecosystems.
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.