Luis J. Oakley

Plant diversity patterns in neotropical dry forests and their conservation implications

Seasonally dry tropical forests are distributed across Latin America and the Caribbean and are highly threatened, with less than 10% of their original extent remaining in many countries. Using 835 inventories covering 4660 species of woody plants, we show marked floristic turnover among inventories and regions, which may be higher than in other neotropical biomes, such as savanna. Such high floristic turnover indicates that numerous conservation areas across many countries will be needed to protect the full diversity of tropical dry forests. Our results provide a scientific framework within which national decision-makers can contextualize the floristic significance of their dry forest at a regional and continental scale.

Forest conservation: Remember Gran Chaco—Response

WE AGREE WITH Kuemmerle et al. that the forests in the Gran Chaco region are under massive threat, underprotected, and deserving of greater attention from scientists and conservationists. We could have included the Chaco woodlands in our analyses, and their distinctive flora would have reinforced

A New Series of the Genus Opuntia Mill. (Opuntieae, Opuntioideae, Cactaceae) from Austral South America

Abstract: Opuntia Ser. Chacopuntiae Oakley & R. Kiesling nov. ser., a new series of the genus Opuntia Mill. (Opuntieae, Opuntioideae, Cactaceae) from austral South America (Argentina, Bolivia and Paraguay) is described here. The type species is Opuntia quimilo K. Schum. The relation with another Opuntia s. str. species and another genus of the Opuntioideae it is mentioned.