Retained Carbon in Beech Trees

The carbon retained by leaves measured in kg/ha is recorded for forty-one different plots of mountainous regions of Navarra (Spain), depending on the forest classification: areas with 90% or more beech trees (Fagus Sylvatica) are labeled monospecific, while areas with many species of trees are labeled multispecific.

Format

A data frame with 41 observations on the following 3 variables:

Plot

plot number

carbon

carbon retained by leaves measured in kg/ha

type

a factor with levels monospecific and multispecific

Source

Gobierno de Navarra and Gestion Ambiental Viveros y Repoblaciones de Navarra, 2006. The data were obtained within the European Project FORSEE.

References

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

Examples

boxplot(carbon ~ type, data=fagus)