Fir: Data on fir (Abies) life history
In bbolker/emdbook: Support Functions and Data for "Ecological Models and Data"

Fir	R Documentation

Data on fir (Abies) life history

Description

Data on various aspects of life history (diameter at breast height, onset of reproduction, crowding, fecundity) from subalpine Abies balsamea, from Dodd and Silvertown

Usage

data(FirDBHFec)
data(FirDBHFec_sum)

Format

DBH: diameter in m at breast height (1.4 m)
fecundity: number of cone rachises [per year?]
pop: which population (wave, nonwave) an individual was sampled from
VAR1: location
WAVE_NON: non-wave (n) or wave (w)
TREE_NO: tree number
C1991: 1991 cones
C1992: 1992 cones
C1993: 1993 cones
C1994: 1994 cones
C1995: 1995 cones
C1996: 1996 cones
C1997: 1997 cones
C1998: 1998 cones
C1999: 1999 cones
NOTES_IN: notes
G1990: 1990 growth
G1991: 1991 growth
G1992: 1992 growth
G1993: 1993 growth
G1994: 1994 growth
G1995: 1995 growth
G1996: 1996 growth
G1997: 1997 growth
G1998: 1998 growth
DBH: diameter at breast height
DBH_MM: dbh in mm
DBH_2: ?
DBH_2MM: ?
AGE: ?
GOOD_OR: ?
PC1998: ?
AC1998: ?
PC1994: ?
AC1994: ?
R3PC1998: ?
RPC1994: ?
RAC1994: ?
RLOOKOUT: ?
RSHREWYS: ?
RWILLS: a factor with levels 0 1 Fajita
C8TOT: ?
G8TOT: ?
RAC1994I: ?
RPC1994I: ?
R3PC1998.1: ?
AC1998I: ?
TOTCONES: total cones

Source

J. Silvertown and M. Dodd, Evolution of life history in balsam fir (Abies balsamea) in subalpine forests, Proc. Roy. Soc. Lond. B (1999) 266, 729-733.

References

M. Dodd and J. Silvertown, Size-specific fecundity and the influence of lifetime size variation upon effective population size in Abies balsamea

Examples

data(FirDBHFec_sum)
attach(FirDBHFec_sum)
plot(DBH,fecundity,col=as.numeric(pop),pch=as.numeric(pop))
lms = lapply(split(FirDBHFec_sum,pop),lm,formula=fecundity~DBH)
for (i in 1:2) abline(lms[[i]],col=i)
detach(FirDBHFec_sum)

bbolker/emdbook documentation built on July 4, 2023, 1:16 p.m.