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"Each of these ecosystems, or stormwater ponds, have a particular amount of bioload that they are able to sustain long-term," she said. Mitigation work is planned for summer 2022.Įach of the stormwater ponds in the city were constructed to support a certain amount of life, contributing to what is called a bioload, said Lauren Zink, a PhD candidate at the University of Lethbridge who is working in the Pyle Laboratory for Aquatic Health. In Lethbridge, the city began taking an inventory of invasive species on Oct. "The problem is, with any invasive species, is once it's established, and it's reproducing, it's very difficult to eradicate completely." By the bioload "We know that they've gone from these ponds in which they were undoubtedly released in and they moved into the wild," he said. Mandrak says the fish can also become an issue from a human health perspective, as they can prompt algal growth, particularly blue-green algae.
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