????

(Food Chain Food Web)

(Producer) :

(Consumer)

(Decomposer)(scavenger)

Bio-accumulation

Bio-magnification

DDT DDT310-6 ppm0.04 ppm0.5 ppm2 ppm25 ppm

1.:2.

;

, 5~20%

:

1.bin

???

;

90 ................100 .............30 ...............12 ......................8

40 1615

100

30,

10

4141