R: Data on fir (Abies) life history

Fir {emdbook} | 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)

[Package emdbook version 1.3.10 Index]