lab bioaccumulation

lab bioaccumulation - Spencer Syfrig MSCI 210L Feb 13, 2007...

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Spencer Syfrig MSCI 210L Feb 13, 2007 Bioaccumulation in Marine Animals One species that is severely affected by bioaccumulation is the Orca, or the Killer Whale. Orcas living in the Arctic region of the world were recently discovered to have the highest levels of accumulated toxins within their body compared to all other animals in the region(Handwerk). The toxins, such as chemicals used in pesticides like PCBs, accumulate in the region because of the northward air and water currents (Handwerk). These chemicals accumulate in the fatty tissue of lower-level organisms and accumulate through the trophic levels. Orcas are the top-level consumer in the Arctic and eat other large mammals such as walruses, seals, and sea lions (Handwerk). Mother orcas nurse their young which then pass the high-level of toxins to them and cause high levels of mortality (Handwerk). Certain chemicals found in high-levels specifically PCBs cause malfunctions in the hormonal and metabolic systems of the Orcas (Handwerk). Many of the chemicals found have been
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lab bioaccumulation - Spencer Syfrig MSCI 210L Feb 13, 2007...

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