ecospat (version 3.2)

ecospat.testNiche.nat: Test Data For The Niche Dynamics Analysis In The Native Range Of A Hypothetical Species

Description

Data frame that contains geographical coordinates, environmental variables, occurrence sites for the studied species and the prediction of its distribution in the native range. These predictions are provided by SDM calibrated on the native range.

Usage

data(ecospat.testNiche.nat)

Format

ecospat.testNiche.nat is a data frame with the following columns:

x

Longitude, in WGS84 coordinate system of the species occurrence.

y

Latitude, in WGS84 coordinate system of the species occurrence.

aetpet

Ratio of actual to potential evapotranspiration.

gdd

Growing degree-days above 5 degrees C.

p

Annual amount of precipitations.

pet

Potential evapotranspiration.

stdp

Annual variation of precipitations.

tmax

Maximum temperature of the warmest month.

tmin

Minimum temperature of the coldest month.

tmp

Annual mean temperature.

species_occ

Presence records of the species occurrence.

predictions

Species Distribution Model predictions of the studied species.

Details

The study area is North America, which is the native range of the hypothetical species.

Eight topo-climatic explanatory variables to quantify niche differences: ratio of the actual potential evapotranspiration; growing degree days; precipitation; potential evapotranspiration; annual variation of precipitations; maximum temperature of the warmest month; minimum temperature of the coldest month; and annual mean temperature.

References

Petitpierre, B., C. Kueffer, O. Broennimann, C. Randin, C. Daehler and A. Guisan. 2012. Climatic niche shifts are rare among terrestrial plant invaders. Science, 335, 1344-1348.

See Also

ecospat.testNiche.inv

Examples

# NOT RUN {
data(ecospat.testNiche.nat)
str(ecospat.testNiche.nat)
dim(ecospat.testNiche.nat)
names(ecospat.testNiche.nat)
# }