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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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environment through bioaccumulation and alterations <strong>of</strong> community structure and function.<br />

Exposure to Pb in laboratory studies and simulated ecosystems may alter species competitive<br />

behaviors, predator-prey interactions, and contaminant avoidance behaviors. Alteration <strong>of</strong> these<br />

interactions may have negative effects on species abundance and community structure. In<br />

natural aquatic ecosystems, Pb is <strong>of</strong>ten found coexisting with other metals and other stressors.<br />

Thus, understanding the effects <strong>of</strong> Pb in natural systems is challenging given that observed<br />

effects may be due to cumulative toxicity from multiple stressors.<br />

AX7-210

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