REED , J. Michael

The endangered population of roseate terns (Sterna dougallii) in the Northwestern Atlantic Ocean consistsof a network of large and small breeding colonies on islands. This type of fragmented population poses anexceptional opportunity to investigate dispersal, a mechanism that is fundamental in population dynam-ics and is crucial to understand...

The habitat of the green-veined white butterfly Pieris oleracea in eastern North America has undergone invasions by the exotic plant garlic mustard (Alliaria petiolata), which is replacing native hosts of P. oleracea such as Cardamine diphylla. A. petiolata was originally lethal to most larvae of the native butterfly but during the past 20+...