biometrics (version 1.0.1)

trlremeasu: Tree-level remeasurements for a sample plot in a Pinus radiata plantation

Description

Temporal tree-level data from a sample plot established in a Monterey pine (Pinus radiata) forestry plantation in Chile. The plot size is 1600 m\(^{2}\), and the plantation was established in 1990.

Usage

data(trlremeasu)

Format

Tree list data for a sample plot remeasured through time, and having the following columns

plot.id

Plot code.

tree

Tree number.

x.coord

Cartesian position in the X-axis, in m.

y.coord

Cartesian position in the Y-axis, in m.

year

Measurement year.

dead

Dead identificator, 0 means alive, and 1 otherwise.

dbh

diameter at breast-height, in cm.

References

- Pommerening A, Trincado G, Salas-Eljatib C, Burkhart H. 2023. Understanding and modelling the dynamics of data point clouds of relative growth rate and plant size. Forest Ecology and Management Volume 529:120652 tools:::Rd_expr_doi("10.1016/j.foreco.2022.120652")

Examples

data(trlremeasu)    
head(trlremeasu)
df<-trlremeasu
df$fe<-10000/1600
df$garb.ha<- (pi/40000)*df$dbh^2*df$fe
gha.t<-tapply(df$garb.ha, df$year, sum)
nha.t<-tapply(df$fe, df$year, sum);
time<-as.numeric(rownames(gha.t))
plot(nha.t~time, type="b",las=1)
plot(gha.t~time, type="b",las=1)