We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Ecotoxic Effects of Nano Plastic on Freshwater plankton (Scenedesmus obliquus and Daphnia magna)
Summary
Researchers tested whether nanoplastic polystyrene particles affect the growth of green algae and the reproduction of water fleas in the lab. They found growth inhibition in algae at high doses and reproductive effects in water fleas, with the route of exposure (dissolved in water versus eaten with food) significantly influencing the severity of effects.
The amount of nanoand microparticles in the aquatic environment rises due to the industrial production of nanoplastic and the degradation of macroplastic into small particles. Little is known about the fate and effects of nanoplastic, while there are lots of speculations about possible effects. In this study, the effects of nano polystyrene on performance of green algae Scenedesmus obliquus and zooplankton Daphnia magna were assessed. At high doses inhibiting effects on the growth of S. obliquus were shown. During chronic tests the suspensions of nano polystyrene were not lethal to D. magna but reproduction effects were observed. Interestingly, aqueous vs. dietary exposure to nano polystyrene played an important role in the occurrence of effects on D. magna. Thereby this study provides a novel indication about the importance of uptake routes in nano plastic exposure.
Sign in to start a discussion.
More Papers Like This
Nanoplastic Affects Growth ofS. obliquusand Reproduction ofD. magna
Researchers tested the effects of nanoplastics on freshwater algae and tiny water fleas, two organisms at the base of aquatic food chains. They found that nano-polystyrene particles reduced algae growth through physical binding to cell surfaces and inhibited reproduction in water fleas at concentrations as low as 30 milligrams per liter. The study demonstrates that nanoplastics can harm freshwater organisms at multiple levels of the food web, even at relatively low concentrations.
Distinctive toxic repercussions of polystyrene nano plastic towards aquatic non target species Nitrobacter vulgaris, Scenedesmus sp and Daphnia magna
Researchers tested polystyrene nanoplastics across a wide concentration range against three aquatic species and found dose-dependent toxicity in all three — inhibiting nitrifying bacteria growth, reducing algal protein and chlorophyll, and killing water fleas — revealing broad ecological hazard across trophic levels.
Effect of Polystyrene Microplastics in Different Diet Combinations on Survival, Growth and Reproduction Rates of the Water Flea (Daphnia magna)
Researchers exposed Daphnia magna water fleas to 6-micrometer fluorescent polystyrene microplastics across different diet combinations over 21 days, finding that animals fed only microplastics showed survival declines similar to starved controls and the least growth, while algae co-feeding partially mitigated but did not eliminate reproductive impacts.
Effects of nano/microplastics on the growth and reproduction of the microalgae, bacteria, fungi, and Daphnia magna in the microcosms
Researchers tested the effects of 14 types of plastic particles and 6 fiber materials on microorganisms and water fleas in both single-species and microcosm experiments. They found that higher concentrations and smaller particle sizes of microplastics led to reduced growth rates in algae and other microorganisms. The study highlights the importance of testing realistic mixtures of plastic types rather than single materials when assessing the ecological risks of microplastic pollution.
Acute and chronic effects of polystyrene microplastics on juvenile and adult Daphnia magna
Researchers investigated the short- and long-term effects of polystyrene microplastics on juvenile and adult water fleas (Daphnia magna). While the particles were not acutely toxic within 48 hours, chronic exposure reduced growth, fecundity, and offspring body size. The study indicates that even at sublethal concentrations, microplastics can impair reproduction and development in this ecologically important freshwater organism.