8.8: Bioaccumulation and magnification
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7 Terms
Bioaccumulation
chemical substance or toxin builds up in a single organism over the span of its life in tissues
dont leave urine easily
Often POPs
Biomagnification
chemical substance or toxin that is transferred through a food chain from lower trophic levels to higher trophic. Results in higher concentration in apex predators
Often POPS
Microplastics are how big
Less than 5mm
Microplastics health impacts
Small plastic particles accumulate din every tissued they examined, including deep brain tissue.
Exposure to the plastics led to behavioural changes in mice, similar to dementia in humans
Possible that microplastics could decrease a protein that impacts the brain
Minamata Disease (Mercury Food Poisoning)
Japan
Chisso Corp (local petrochemical & plastics maker) dumped ~27 tons of mercury into Minamata Bay.
Mercury bioaccumulation in the tissues of fish & shellfish
biomagnification, mercury poisoning occurred in the humans that ingested the contaminated fish & shellfish.
Biomagnification of DDT
Taken in by bottome feeders like zooplankton
Biomagnification of Methyl/mercury
Taken in by Phytoplankton
