General Introduction Ecotoxicology: Science, Technology, and Practice Bioaccumulation Uptake, Biotransformation, Detoxification, Elimination, and Accumulation Factors Influencing Bioaccumulation Bioaccumulation from Food and Trophic Transfer Toxicant Effects Molecular Effects and Biomarkers Cells, Tissues, and Organs Sublethal Effects to Individuals Acute and Chronic Lethal Effects to Individuals Effects on Populations Effects on Communities and Ecosystems Landscape to Global Effects Risk from Pollutants Risk Assessment of Contaminants Risks from Exposure to Radiation Summary Conclusions References Glossary Appendices International System (SI) of Units Prefixes Miscellaneous Conversion Factors Summary of US Laws and Regulations Derivation of Units for Simple Bioaccumulation Models Equations for the Estimation of Contaminant Exposure Study Questions Index.