Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

Sign Up for a Free Account For information on discounts, see Plans & Pricing

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

Mercury biomagnification: conceptual illustration of mercury accumulating up the food web

Mercury levels increase exponentially up the food web as algae are eaten by small invertebrates which are eaten by larger invertebrates (such as dragonfly larvae) which are eaten by fish and other higher-order predators. (Source: Air Resources Division, U.S. National Park Service. Public domain.)

Related Article

Related Media