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"An Ecosystem's Disturbance By A Pollutant
Beginning of paper
L. Lehr
Freedman defines a pollutant as "the occurrence of toxic substances or energy in
a larger quality then the ecological communities or particular species can
tolerate without suffering measurable detriment" (Freeman, 562). Although the
effects of a pollutant on an organism vary depending on the dose and duration
(how long administered). The ....
Middle of paper
....ental effect on the ecosystem in several ways. First, by the killing of an
entire population by a pollutant, it offsets the food chain and potentially
kills off other species that depended on that organism for food. Such is the
case when a keystone species is killed. If predators were the dominant species
high on the food chain, the organisms that .... |
| Word count: 2974 |
Page count: 11 |
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