Biomagnification
Uit Kust Wiki
Biomagnification is bioaccumulation through ingestion of prey items. It causes contaminant concentration to increase with increasing trophic level. Because of biomagnification low trofic level species (like phytoplancton) have a lower contaminent concentration than high trophic level species (like birds).
http://glossary.eea.europa.eu/terminology/concept_html?term=biomagnification

