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Papers
61,005 resultsShowing papers similar to Assessing the Ecological Effects of Multiple Stressors in River and Stream Ecosystems
ClearStreambed pollution: A comprehensive review of its sources, eco-hydro-geo-chemical impacts, assessment, and mitigation strategies
This comprehensive review covers the sources, ecological impacts, and mitigation strategies for streambed pollution from multiple contaminants including sediments, nutrients, metals, and emerging pollutants including microplastics. Streambeds are critical habitat for many organisms and act as both sinks and sources of contaminants in river systems. The review identifies microplastics as a rapidly growing streambed pollutant with poorly understood long-term ecological effects.
Microplastics in freshwater ecosystems : effects and drivers
This thesis assessed how microplastic exposure affects freshwater microorganisms, macroinvertebrates, and other organisms in freshwater ecosystems, finding that microplastics are a pervasive contaminant of freshwater environments with unclear but potentially significant ecological impacts.
Environmental Impact of Microplastics in Aquatic Ecosystems: A Review of Current Research and Future Directions
This review examines microplastic pollution in aquatic ecosystems, covering chemical, biological, and ecological processes beyond simple physical contamination and identifying priority areas for future research directions.
Interactive Threats: Multi-stress Systems in Aquatic Environments
Researchers examined how aquatic organisms face multiple simultaneous stressors — including plastic pollution, climate change, altered pH, and habitat loss — finding that the combined interactive effects of these threats are poorly understood yet critical to developing effective conservation and management strategies.
Multi stress system: Microplastics in freshwater and their effects on host microbiota
This study examined how combined exposure to microplastics and organic chemical pollutants affects freshwater organisms through a multi-stress approach, focusing on gut microbiome changes as an indicator. Microplastic exposure in combination with other pollutants altered microbiome composition more than either stressor alone, with potential consequences for host fitness and disease resistance.
Effect assessment of nano- and microplastics in freshwater ecosystems
This doctoral thesis assessed the effects of nano- and microplastics on freshwater ecosystems, from individual species to community-level impacts. Freshwater sediments are known to accumulate these particles, and the research addresses critical gaps in understanding how long-term exposure at realistic concentrations affects aquatic communities.
Presença e efeitos da poluição plástica em peixes marinhos e de água doce
This thesis (in Portuguese) investigates plastic contamination in freshwater and marine fish, examining physiological, functional, and ecological effects across multiple levels of biological organization, including food safety implications for human consumption. The author finds that the scientific community has made progress on understanding individual-level effects but that broader ecological impacts and ecosystem-level consequences remain underexplored. The work contributes important evidence that plastic pollution in fish poses intertwined risks for wildlife and the people who eat them.
First evidence of microplastics in a freshwater river and their relationship to water quality
Researchers measured microplastic concentrations in a freshwater river used for recreational purposes and found a significant relationship between microplastic abundance and water physicochemical quality parameters, along with the presence of three organic compounds, providing evidence that microplastic pollution and water quality are closely linked.
Effects of microplastics on freshwater organisms: A laboratory approach
This thesis systematically examined how microplastics harm freshwater organisms both physically and by acting as carriers for chemical pollutants. The research found that both the physical presence of microplastics and the chemicals associated with them can negatively affect freshwater species.
Towards more ecologically relevant investigations of the impacts of microplastic pollution in freshwater ecosystems
This review argues that microplastic research in freshwater ecosystems lacks ecological realism, calling for studies that account for realistic exposure concentrations, particle mixtures, and multi-species interactions rather than single-species laboratory tests.
Environmental risks of microplastics: A Review of their distribution and effects on aquatic ecosystems
This review examined how microplastics threaten aquatic ecosystems through direct physical and chemical stress on organisms and through synergistic interactions with co-contaminants that disrupt food webs. The authors identify key research gaps including realistic multi-stressor experiments and long-term ecosystem-level studies.
Relative contributions of different local sources to riverborne microplastic in a mixed landuse area within a tropical catchment
Researchers quantified the relative contributions of different land-use sources to riverborne microplastics in a tropical catchment, providing data to help prioritize pollution reduction measures for protecting human and ecological health.
Influence of microplastics on nutrients and metal concentrations in river sediments
Researchers investigated how microplastics influence nutrient and metal concentrations in river sediments, finding that microplastics alter the distribution of pollutants through their capacity to adsorb contaminants and support biofilm formation on their hydrophobic surfaces.
Investigations into the Roles of Organisms on Environmental Plastic Pollution
This thesis investigated the roles of organisms in environmental plastic pollution, examining how marine and freshwater animals ingest microplastics and how they may transfer them through food webs. The work contributes to understanding the ecological consequences of plastic contamination in aquatic ecosystems.
Long-term exposure of a free-living freshwater micro- and meiobenthos community to microplastic mixtures in microcosms
Researchers exposed a natural freshwater micro- and meiobenthos community to microplastic mixtures in long-term microcosm experiments, finding community-level effects that differ from single-species studies and highlighting the importance of realistic multi-polymer exposure scenarios.
Emerging contaminants, including microplastics, in surface waters : uses of watersheds and impacts on the environment
This thesis investigated emerging contaminants including microplastics in surface waters across different land use types in Brazil, examining how watershed activities influence contamination levels in rivers and streams.
Transport processes of microplastic particles in the fluvial environment : erosion, transport and deposition
This thesis examines how microplastics are eroded, transported, and deposited in river systems, tracing their movement from land sources to the ocean. The research fills an important gap in understanding how rivers act as conduits for microplastic pollution and what processes determine where plastic particles accumulate in freshwater environments.
A review: Research progress on microplastic pollutants in aquatic environments
This review summarizes current research on microplastic pollution in aquatic environments, including sources, detection methods, and ecological effects. The study highlights that microplastics can carry heavy metals and organic pollutants, forming complex contaminant combinations that accumulate through the food chain with potentially unpredictable consequences for both aquatic life and human health.
Physical and chemical toxicity of microplastics on marine organisms
This PhD thesis investigated the physical and chemical toxicity of microplastics to marine organisms, conducting long-term leaching experiments (up to 8 months) and an in situ field study across nine European rivers. The research found that plastic leachates retain toxicity over extended periods and that environmental plastic surfaces adsorb significant inorganic and organic pollutants with detectable downstream biological effects.
Microplastics meet micropollutants in a central european river stream: Adsorption of pollutants to microplastics under environmentally relevant conditions
Researchers investigated how microplastics adsorb organic micropollutants in a Central European river under real-world conditions. They found that aged microplastics showed higher adsorption capacity for contaminants compared to pristine ones, and that the type of plastic material influenced which pollutants were absorbed. The findings suggest that microplastics in rivers can act as carriers for harmful chemicals, potentially spreading contamination through aquatic ecosystems.
Interconnected impacts of water resource management and climate change on microplastic pollution and riverine biocoenosis: A review by freshwater ecologists
Researchers reviewed how river hydrology, water resource management, and climate change interact to influence microplastic pollution in freshwater ecosystems. They found that floods can flush microplastics from catchments, while reservoirs act as both sinks and sources, and extreme weather events driven by climate change tend to concentrate microplastics and threaten aquatic organisms. The study highlights a critical gap in research that jointly addresses these interconnected factors and calls for integrated policy approaches.
Freshwater systems in the Anthropocene: why we need to evaluate microplastics in the context of multiple stressors
Real-world organisms are exposed to microplastics alongside many other environmental stressors — temperature change, chemical pollutants, habitat degradation — yet most lab studies test microplastics in isolation. This review argues that ecotoxicology needs to adopt a multi-stressor approach to truly understand how microplastics affect freshwater life at every level, from individual cells to whole ecosystems. Without this broader context, risk assessments will consistently underestimate the actual harm microplastics cause in nature.
Fate and effects of microplastics in combination with pharmaceuticals and endocrine disruptors in freshwaters: Insights from a microcosm experiment
Researchers conducted a microcosm experiment exposing moss and caddisflies to microplastics combined with pharmaceuticals and endocrine disruptors, finding that microplastics can alter the fate and biological effects of co-occurring chemical contaminants in freshwater ecosystems.
Microplastics in river water: occurrence, weathering, and adsorption behaviour
Researchers examined microplastics in river water, characterizing their occurrence, degree of weathering, and capacity to adsorb co-contaminants. The study highlights microplastics as vectors that can transport and re-release other pollutants in freshwater systems.