Freshwater aquatic systems.

Aquatics 1. able to define a wetland Wetland: A wetland is defined as an area that is seasonally or permanently covered by shallow water, and can be either saltwater or freshwater. The soils are water-saturated, making it ideal for water-tolerant plants to live in. Some wetlands serve as an ecotone (transitional zone) between deeper waters and land systems. Wetlands are found in the peripheries of rivers/streams/lakes/ponds OR open or wooded areas where the …

…the pH level of the systems, causing fish population deaths. Toxic pollutants such as mercury and PBCs accumulate in the system and released slowly into the water, thus the effects are long term. These persistant organic pollutants (POPs) bioaccumulate in the system, with the organisms highest up in the trophic levels feeling the most devastating effects. High concentration of these pollutants can cause, body deformations, behavioural abnormalities, motor and neural dysfunctions, reproductive failure and death.