16 July 2010
Vol 329, Issue 5989

About The Cover

Cover image expansion

COVER A seedling carpet dominated by Dipteryx oleifera (almendro) in the forest understory of Barro Colorado Island, Panama. Seedlings here have a lower probability of surviving when surrounded by neighbors of their own species. However, rare species suffer more from the presence of like neighbors than do common species, suggesting a mechanism that shapes species abundances in diverse tropical forest communities. See page 330. Photo: Christian Ziegler