Alien mammals: risk table with covariates (Juozaitienė et al. 2023)

The first records of 112 alien mammal species in the regions of the FirstRecords database, 1880–2005, as a risk table: one row per species, region and time interval during which the pair was at risk, with the covariates of Juozaitienė et al. (2023). A pair leaves the table after its first record (event = 1).

Usage

alien_mammals

Format

A data frame with 24,584 rows and 13 columns:

species, region

The pair.

start, stop

Years delimiting the interval; a first record is dated at stop.

event

1 when the interval ends with the first record, 0 otherwise.

dist

Distance (km) from the region to the nearest region the species has already invaded by stop.

num_inv

Weighted number of earlier invasions in the region.

trade

Sum of annual trade flows (current US dollars) between the region and the regions the species has invaded; NA when not recorded.

col

1 if the species is present in a region of the same colonial area.

temp_dist

Smallest absolute temperature difference (degrees C) between the region and the regions already invaded.

pasture, urban, cropland

Shares of land use in the region.

Source

Juozaitienė R, Seebens H, Latombe G, Essl F, Wit EC (2023). Analysing ecological dynamics with relational event models: the case of biological invasions. Diversity and Distributions 29(10), 1208–1225, doi:10.1111/ddi.13752 . Data: Dryad doi:10.5061/dryad.x69p8czpv (CC0 1.0).

Details

Two attributes describe the risk set. attr(x, "never_at_risk") is a data frame (sender, receiver) of the species–region pairs that never appear in the table (native range, or established before 1880), to pass to sample_non_events(exclude_pairs = ). attr(x, "entry") gives, for each species, the year from which it is at risk.

See also

alien_invasions for the first records of all taxa.