siplab (version 1.6)

boreas: Marked Point Pattern Tree Data from BOREAS

Description

Four data sets from the Boreal Ecosystem<U+2013>Atmosphere Study (BOREAS, Rich and Fournier 1999), as used by Garc<U+00ED>a (2006). These are approximately evenaged and single-species unmanaged natural forests, from a northern study area in Manitoba and a southern study area in Saskatchewan, central Canada. Tree coordinates and diameters at breast height (dbh) were measured for all trees taller than 2 m on areas of 50 m \(\times\) 60 m, subdivided into subplots on a 10 m grid. Tree heights were estimated from height-dbh regressions based on a sample of height measurements. The data here excludes dead trees, and also excludes some trees with coordinates just outside the observation window.

The 4 data sets are:

boreasNP:

Northern study area, Jack pine

boreasNS:

Northern study area, black spruce

boreasSA:

Southern study area, trembling aspen

boreasSP:

Southern study area, Jack pine

Format

Each data set is a spatstat marked point pattern object (class ppp). The marks are a data frame with dbh (cm), height (m), species, a dominance classification, and a subplot id.

References

Rich, P.M., and Fournier, R. (1999) BOREAS TE-23 map plot data [online]. Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee. Available from http://daac.ornl.gov.

Garc<U+00ED>a, O. (2006) Scale and spatial structure effects on tree size distributions: Implications for growth and yield modelling. Canadian Journal of Forest Research 36(11), 2983--2993. 10.1139/x06-116.

Examples

# NOT RUN {
summary(boreasNP)
plot(boreasNP)
# }
# NOT RUN {
aNP <- assimilation(boreasNP)
# }
# NOT RUN {
# this may take a few minutes!
# }