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Microcosm technology serves as a sophisticated tool for simulating natural ecosystems, facilitating the examination of pollutants' ecological impacts across population, community, and ecosystem scales. Currently, this technology finds extensive application in ecological toxicology and ecological risk assessment research. This concise review highlights the utility of microcosm technology in ecotoxicology, detailing the establishment of aquatic microcosms and analyzing key research trends to assess the ecological impacts of pollutants. It emphasizes the evaluation of pesticides, industrial chemicals, and heavy metals, providing a comparative analysis of safety thresholds derived from microcosm studies versus other methods. Finally, the review underscores the four urgent directions for future exploration: (a) track pollutant metabolites in microcosms; (b) develop microcosms with diverse species for natural ecosystem mimicry; (c) use DNA macrobarcoding to assess zooplankton and link it to species abundance; (d) study reasons behind no observed effect concentration (NOEC) vs. the 95% harmless concentration (HC5) values in microcosm studies. The determination of these directions helps to fill the gaps in understanding the fate and effects of pollutants within controlled ecosystem simulations.
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http://dx.doi.org/10.3390/toxics13080694 | DOI Listing |
Integr Environ Assess Manag
September 2025
Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.
Pesticides are widely used to meet the food demands of a growing population, with various types used to control pests depending on the crops grown. Rainfall, overspray, and runoff from agricultural fields can wash these insecticides into water bodies, posing documented environmental risks. Imidacloprid is commonly used in Afrotropical regions such as South Africa, yet limited information is available on its toxicity to aquatic ecosystems within this climate region.
View Article and Find Full Text PDFWater Res
August 2025
Key Laboratory of Environmental Aquatic Chemistry, State Key Laboratory of Regional Environment and Sustainability, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Sediment-associated microbial communities are pivotal in driving biogeochemical processes and serve as key indicators of ecosystem health and function. However, the ecological impact of protist predation on these microbial communities remains poorly understood. Here, sediment microcosms were established with varying concentrations of indigenous protists.
View Article and Find Full Text PDFToxics
August 2025
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Microcosm technology serves as a sophisticated tool for simulating natural ecosystems, facilitating the examination of pollutants' ecological impacts across population, community, and ecosystem scales. Currently, this technology finds extensive application in ecological toxicology and ecological risk assessment research. This concise review highlights the utility of microcosm technology in ecotoxicology, detailing the establishment of aquatic microcosms and analyzing key research trends to assess the ecological impacts of pollutants.
View Article and Find Full Text PDFEnviron Sci Technol
August 2025
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Soil harbors abundant bacteria and viruses that can be delivered into water environments and alter aquatic ecology. However, the mechanisms by which the intruded soil microbes mediate the turnover of dissolved organic matter (DOM) in waters are unknown. Here, we prepared bacterial and phage-enriched inocula from the northern high-humic-composition (NHHS) and southern low-humic-composition (SLHS) soils in China, and investigated their roles in aquatic DOM transformation via microcosm experiments.
View Article and Find Full Text PDFMicrobiol Spectr
August 2025
Allied Health Sciences Department, College of Health and Sport Sciences, University of Bahrain, Manama, Bahrain.
Estriol (E3) is one of the natural steroid estrogens commonly detected in wastewater. Although microbial biodegradation is a key process for removal of steroid estrogens during wastewater treatment, estriol biodegradation, and biotransformation mechanisms, as well as the involved bacterial consortia remain to be revealed. We enriched three E3-degrading bacterial consortia from raw sewage (inflow wastewater) and sludge samples.
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