Unnatural selection

By carefully removing species, humans can help avert disaster in imperiled ecosystems

A little human meddling may prevent the mess of extinctions that can ripple through disturbed ecosystems.

CONSTRUCTIVE INTERFERENCE Modeling interactions in the Chesapeake Bay food web reveals how meddling affects the entire network. While removal of some species (large red dots) may cause an extinction cascade, removal of other players (green) can shore up the network, limiting damage.