26 February 2016
Vol 351, Issue 6276

About The Cover

Cover image expansion

COVER Sunrise over a tropical forest in Brazil. The seasonal patterns of leaf development in Amazonian forests, measured using tower-based cameras above the tree crowns, regulate the patterns of carbon dioxide flux in the forest canopy. Photosynthesis tends to be greatest when the crop of young leaves reaches a peak, rather than depending on precipitation in the rainy season. See page 972.
Photo: © Leonide Principe/Alamy