Radial increments of Pinus pinaster from
two sample plots located on the North of Spain (Soria) and on the central
portion of the country (Cuenca).
Usage
data(Prings05)
Arguments
Format
A data frame with the following 5 variables.
x
A numeric vector with the radial increments in mm
year-1
year
A numeric vector with the recorded year
sample
A factor indicating the sample replicate
tree
A factor indicating the number of measured tree
plot
A factor indicating the code of measured plot
Details
This dataset
contains eight series of tree-ring widths of maritime
pine (Pinus pinaster), with recorded years spanning from 1810
to 2005. The cores were sampled
from dominant trees of two sites, with sample plots being located on
both: northern Spain (plot code: P44005) and central portion of
the country (plot code: P16106). Two trees were selected by plot,
and two core samples were extracted by tree. Consequently, the sample
design defined three levels: sample in tree on plot (plot level),
sample in tree (tree level), and sample level.
References
Bogino, S., and Bravo, F. (2008). Growth response of Pinus pinaster Ait. to climatic variables in central Spanish forests. Ann. For. Sci. 65, 1-13.