betaper (version 1.1-2)

Amazonia: Tree abundance and soil data in Western Amazonia

Description

The Amazonia data frame has tree counts in nine 0.16-hectare inventory plots in Western Amazonia. soils contains data on soil cations at each location.

Usage

data(Amazonia)
data(soils)

Format

Amazonia is a data frame with 1188 observations (species) and 12 columns (taxonomic descripcion and sites). The three first columns refer to family, genus and specific species Latin names. Columns 4 to 12 have tree abundance data for nine inventory plots.

soils is a data frame with 9 observations (inventory plots) and 4 columns (variables). Soil variables (Ca, K, Mg, Na) are given in cmol/kg.

Details

Data from Western Amazonia includes tree inventories at nine lowland sites (approximately 100-150 m above sea level) near Iquitos, Peru. The sites were selected to represent regional variations in geology and were distributed along a soil nutrient gradient ranging from poor loamy soils to richer clayey soils. Each inventory consisted of 20 x 20 m plots (0.16 ha total area) distributed along 1.3-km transects. At each site, K. Ruokolainen and colleagues identified to species or morphospecies all woody, free-standing stems of > 2.5 cm dbh. The full inventories sampled 3980 individuals from 1188 species or morphospecies.

References

Higgins, M.A. & Ruokolainen, K. 2004. Rapid tropical forest inventory: a comparison of techniques based on inventory data from western Amazonia. Conservation Biology 18(3): 799-811.

Ruokolainen, K., Tuomisto, H., Macia, M.J., Higgins, M.A. & Yli-Halla, M. 2007. Are floristic and edaphic patterns in Amazonian rain forests congruent for trees, pteridophytes and Melastomataceae? Journal of Tropical Ecology 23: 13-25.

Examples

# NOT RUN {
data(Amazonia)
data(soils)
# }