An international team of researchers has compiled a large set of field data and reports that the number of hyperdominant tree species in Amazonian rain forests is three times greater than believed thus far. Hyperdominants are the most abundant species that together make up at least half of all the individuals that are studied. These results can be used for better planning of conservation and use of Amazonian forests.
Understanding the ecology and distributions of species in Amazonia is hampered by lack of information about environmental conditions, such as soils. Plant occurrence data are typically more abundant than soil samples in poorly known areas, and researchers from Finland and Brazil have now developed a method that uses both plant and soil data to produce a map of soil properties.