recruitment.eachspp {CTFS}R Documentation

Annual Recruitment Rate for Species

Description

Computes annual recruitment rate for each species. Any two census datasets can be provided in order of date of census. The annual recruitment rate and other statistics are computed for each species.

Usage

recruitment.eachspp(census1, census2, mindbh=10, 
        alivecode = c("A", "AB","AS"))

Arguments

census1 name of census datafile for first census, must be a dataframe, must be of same length as census2
census2 name of census datafile for second census, must be a dataframe, must be of same length as census1
mindbh minimum DBH in census1 for inclusion in computation.
alivecode character, codes of the variable status that indicate the tree is alive. The most general valid categories are: "A" and "AB" and "AS".

Details

See CTFS.recruitment for details on the computation of recruitment rates and associated functions.

Any two censuses on a datafile must be used. They do not have to be sequential, only that census1 has to be before census2.

The results of recruitment can be organized into dataframes with the use of assemble.demography.

Value

recruit returns a list of arrays with the following named component. Values are reported for each species. If no value can be computed then 0 or NA is returned as appropriate.

$N1 the number of living trees at the second census
$R the number of trees that were recruited between the first and second census
$rate the recruitment rate in %/year
$lower the lower 95% confidence interval
$upper the upper 95% confidence interval
$time mean number of years between census for trees used in recruitment rate computation.
$date0 mean date of first census
$date1 mean date of second census

Author(s)

Rick Condit and Pamela Hall

See Also

CTFS.recruitment

Examples

## Not run: 
rec.spp.out <- recruitment.eachspp(tst.bci90.full,tst.bci95.full)
rec.spp.out
## End(Not run)

[Package CTFS version 1.00 Index]