| gm {epimdr} | R Documentation |
Defoliated by gypsy moth each in northeast US 1975-2002.
Description
A dataset containing the fraction of forest defoliated by the gypsy moth in 20km x 20km pixels across northeast US in each year between 1975 and 2002.
Usage
gm
Format
A data frame with 1086 rows and 30 variables:
- UTMX
UTM x-coordinates
- UTMY
UTM y-coordinates
- d1975
Defolitation in 1975
- d1976
Defolitation in 1976
- d1977
Defolitation in 1977
- d1978
Defolitation in 1978
- d1979
Defolitation in 1979
- d1980
Defolitation in 1980
- d1981
Defolitation in 1981
- d1982
Defolitation in 1982
- d1983
Defolitation in 1983
- d1984
Defolitation in 1984
- d1985
Defolitation in 1985
- d1986
Defolitation in 1986
- d1987
Defolitation in 1987
- d1988
Defolitation in 1988
- d1989
Defolitation in 1989
- d1990
Defolitation in 1990
- d1991
Defolitation in 1991
- d1992
Defolitation in 1992
- d1993
Defolitation in 1993
- d1994
Defolitation in 1994
- d1995
Defolitation in 1995
- d1996
Defolitation in 1996
- d1997
Defolitation in 1997
- d1998
Defolitation in 1998
- d1999
Defolitation in 1999
- d2000
Defolitation in 2000
- d2001
Defolitation in 2001
- d2002
Defolitation in 2002
Source
Bjornstad, O. N., Robinet, C., & Liebhold, A. M. (2010). Geographic variation in North American gypsy moth cycles: subharmonics, generalist predators, and spatial coupling. Ecology, 91(1), 106-118. doi.org/10.1890/08-1246.1.