siplab (version 1.0)

boreas: Marked Point Pattern Tree Data from BOREAS

Description

Four data sets from the Boreal Ecosystem–Atmosphere Study (BOREAS, Rich and Fournier 1999), as used by García (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 50 m $\times$ 60 m areas, 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 some trees with coordinates slightly outside the observation window.

The 4 data sets are: [object Object],[object Object],[object Object],[object Object]

encoding

UTF-8

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.

source

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=359

References

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

García{Garcia}, 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. http://web.unbc.ca/~garcia/publ/distrib-CJFR.pdf.

Examples

data(boreasNP)
summary(boreasNP)
plot(boreasNP)
aNP <- assimilation(boreasNP)
# this may take a few minutes!