Ecosystem Effects

Biomagnification is a problem mostly with organochlorine pesticides. The classic case is DDT and its metabolite DDD. Figure 18.9 illustrates two examples of organochlorine bio-magnification.

By their very nature, pesticides can produce pronounced effects on populations and ecosystems. These include many that were dramatically publicized by Rachel Carson in her book Silent Spring, including fish and bird kills, development of insect resistance, and actually causing an increase in some pests by destroying their predators. In the latter

TABLE 21.6 Fate and Transport Properties of Some Pesticides

Pesticide

Aqueous Solubility (mg/L)

Log10 KOW

Log10 BCF (Fish) (L/kg)

Typical Environmental Half-Life

Organochlorines

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