Biomagnification & Cadmium Pt. 2 - Gracie

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Biomagnification & Cadmium Pt. 2 - Gracie
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  • Gracie Australia Wildfires Biomagnification
  • Plants safely store mercury after they accumulate it by absorbing the mercury through the air or water. Mercury is especially able to be absorbed and contained by woody plants that have bark, such as shrubs.
  • When on fire, these plants release the mercury that has accumulated inside of them. This is exactly what happened in Australia during the wildfires, or bushfires in late 2019, early 2020.
  • The mercury released in the bushfires eventually settles in lakes or bodies of water. The fish absorb the mercury and other toxins from the water into their gills, and the mercury binds tightly to their muscles. The mercury is extremely difficult to remove, so it just builds up inside of the fish.
  • The mercury that built up inside of the fish gets ingested by the predator that consumes them (like a bird). That predator has to eat multiple fish in order to survive, so they get larger amounts of mercury in their own systems from everything that was previously accumulated in the fish.
  • The mercury makes its way up the food chain through each predator consuming prey with mercury in its system. In Australia, due to bushfires, the mercury was released into water from the plants where it was absorbed by fish. The mercury from the fish gets ingested by a larger animal, eventually building up more and more mercury in each organisms system as you work your way up the food chain.
  • Even after the bushfires were done, animals continued to have health problems due to all of the mercury and other chemicals building up in their systems.
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