Add Helsinki urban-forest carabid traits (Finand & Kotze)

Joins ground-beetle traits measured from Helsinki specimens to a taxify() result by accepted name.

Usage

add_finand(x, cols = NULL, verbose = TRUE)

Arguments

x: A data.frame returned by taxify().
cols: Which columns to attach: NULL (default) all of them, or a character vector of names. See enrichment_cols.
verbose: Logical. Default TRUE.

Value

The same data.frame with finand_ columns: numeric body_length_mm; categorical wing_morph, feeding_type, habitat_pref, moisture_pref.

Details

Source: Finand & Kotze (2025), 34 species from 25 remnant urban forests in Helsinki.

Small, and carried for a reason no larger source can supply. Every other reachable carabid trait table traces its body sizes and wing classes back to carabids.org (Homburg et al. 2014), so agreement between them is not corroboration. These body lengths were measured from the beetles the authors caught, which makes them the one independent check: they run at a median ratio of 0.9946 against the NW European arthropod compilation over 28 shared species, with only 7.1 percent exactly equal.

body_length_mm is a whole-body length despite the source column being terse about it; elytra length would sit near 0.6 of these values.

wing_morph records the morph of the beetles caught in Helsinki, so it can name a definite morph where a species-level source calls the species dimorphic. Compare add_chowdhury(), which states the species' capacity.

References

Finand B, Kotze DJ (2025) Habitat specialisation and dispersal capacity drive rapid carabid beetle responses to urban forest fragmentation. Zenodo. doi:10.5281/zenodo.17184995

Examples

if (FALSE) { # \dontrun{
taxify(c("Carabus glabratus", "Cychrus caraboides")) |>
  add_finand()
} # }