Cover

Abstract

COVER PHOTO: This photo, taken on March 19, 2023 by Catherine Hulshof De La Peña, shows the view from an abandoned pasture toward the peak of Volcán Cacao (1650 m above sea level) and its tropical cloud forests, in Sector Cacao, Area de Conservación Guanacaste (ACG), Costa Rica. As described in Walter et al. (https://doi.org/10.1002/ecy.4442), evidence shows that temperature and precipitation regimes are shifting across ACG, leading to upslope migration in some taxa, making this elevational gradient an elevator to extinction. Studies like ours to track the ecotone between lowland seasonal tropical dry forests and upland aseasonal wet and cloud forests help identify biological corridors and point to mechanisms driving changes in forest composition and phenology in response to changes in seasonality. Additional images appear in this issue of the Bulletin's Photo Gallery.