redlistr (version 1.0.1)

futureAreaEstimate: Future Area Estimate

Description

futureAreaEstimate calculates the expected area of a distribution at a future date using known rates of decline.

Usage

futureAreaEstimate(A.t1, year.t1, nYears, ARD = NA, PRD = NA, ARC = NA)

Arguments

A.t1

Area at time t1

year.t1

Year of time t1

nYears

Number of years since t1 for area prediction

ARD

Absolute rate of decline

PRD

Proportional rate of decline

ARC

Annual rate of change

Value

A dataframe with the forecast year, and a combination of:

• Future area as estimated with absolute rate of decline (ARD)

• Future area as estimated with proportional rate of decline (PRD)

• Future area as estimated with absolute rate of change (ARC)

References

Bland, L.M., Keith, D.A., Miller, R.M., Murray, N.J. and Rodriguez, J.P. (eds.) 2016. Guidelines for the application of IUCN Red List of Ecosystems Categories and Criteria, Version 1.0. Gland, Switzerland: IUCN. ix + 94pp. Available at the following web site: https://iucnrle.org/

Examples

# NOT RUN {
a.r1 <- 23.55
a.r2 <- 15.79
decline.stats <- getDeclineStats(a.r1, a.r2, year.t1 = 1990, year.t2 = 2012,
                       methods = 'PRD')
a.2040.PRD <- futureAreaEstimate(a.r1, a.r2, year.t1 = 1990, nYears = 50,
                                 PRD = decline.stats$PRD)
# }