BIO153H5 Lecture Notes - Lecture 5: Marine Protected Area, Indian Ocean, Bioaccumulation
Document Summary
Ddt was the wonder weapon against insect pests. Ddt was used virtually everywhere when it was initially produced on an industrial scale. Eventually some warning signs came up that suggested that ddt had effects other than its intended purposes. The ddt concentrations in other organisms (such as phytoplankton and zooplankton) was higher that it should be. The higher up in the food chain, the higher the concentration of ddt was measured in organisms. Chemicals accumulate throughout the food (cid:272)hai(cid:374); the(cid:455) are(cid:374)"t take(cid:374) apart (cid:271)(cid:455) the organisms that inject them (they become more concentrated in the food chain) High ddt concentration in eggs caused the eggs to break when the mothers sat on the eggs (the eggs became too fragile) This was most seen in falcons, hawks, and birds such as this. Ra(cid:272)hel carso(cid:374) (cid:449)rote a (cid:271)ook, (cid:862)the ile(cid:374)t pri(cid:374)g(cid:863) a(cid:271)out her s(cid:272)ie(cid:374)tifi(cid:272) research about ddt. Credited with a lot of involvement in creating the environmental movement.
