An Assessment of a Mesocosm Approach to the Study of Microbial Respiration in a Sandy Unsaturated Zone. New experimental approach to aquatic microcosm systems. Once a study is complete, a new experiment can be readied within a few weeks.Ĭurrent and previous research has examined the ecological impacts and chemical fate of pesticides, PAHs, fluorinated compounds, and veterinary and human pharmaceuticals. MODEL STUDY OF FACTORS INFLUENCING STEADY STATE CLEARANCE FOR LIPOPHILIC TOXICANTS IN AQUATIC MICROCOSMS. Concurrent studies can be conducted throughout the year, facilitating seasonal assessments. Small fish can be introduced if desired, typically in enclosures, and growth, development and reproduction monitored. Sediments can be introduced, providing benthic habitat for influent and aerially colonizing invertebrates, and the development of naturally occurring and introduced aquatic plant communities. This microcosm system was designed to support modelling approaches of the catchment scale and gain insights into the fate of pesticides simulating a large. It is from this pond that natural zooplankton, phytoplankton and other invertebrate communities in the microcosms are established. An aquatic microcosm consisting of four compartments, namely surface microlayer (SM), water sediment and biota (zebra fish), was developed to investigate. They are supplied with source water from a large permanent on-site well-fed reservoir. The microcosms have a water depth of 1 m, a diameter of 3.9 m, and a capacity of approximately 12,000 L of water and are open to the elements e.g., rain, light, temperature.Įach microcosm is a stable independent model ecosystem capable of supporting multiple trophic levels under natural conditions. The microcosms were constructed in 1995 and has been in continuous use since that time. The Aquatic Ecotoxicology Microcosm Facility is located at the University of Guelph and consists of thirty PVC-lined round tanks (microcosms) that are designed to replicate freshwater pond ecosystems.
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