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Valued weights and resistance between OCS-GE layers and species

ocsge_species_dict.Rd

A dataset providing detailed ecological scores linking European terrestrial vertebrate species to French OCS-GE (Occupation du Sol à Grande Échelle) land cover classes.

Unlike traditional expert-based crosswalks that assign simple presence/absence or discrete suitability scores (e.g., 0, 1, 2), this dataset was generated using a Large Language Model (LLM - Google Gemini). The model semantically analyzed free-text descriptions of preferred and avoided habitats (derived from the EEA dataset) against ecological definitions of OCS-GE classes to infer granular scores (0 to 10).

These scores are specifically designed for spatial ecology modeling, separating general suitability from movement permeability and foraging potential.

Usage

data(ocsge_species_dict)

Format

A data frame with the following columns:

nom_espece

Character. The scientific name of the species.

code_cs

Character. The OCS-GE layer code (e.g., "CS 1.1.1.1").

weight_global

Numeric (0-10). The overall habitat suitability of the OCS-GE layer for the species.

weight_movement

Numeric (0-10). The permeability of the layer, representing how easily the species can disperse through it.

weight_foraging

Numeric (0-10). The suitability of the layer specifically for feeding and resource acquisition.

resistance

Numeric (0-10). The impedance or barrier effect of the layer, heavily influenced by known avoided habitats.

Details

The methodology differs significantly from global Area of Habitat (AOH) approaches. While global AOH maps rely on hard-coded rules and keyword-based penalties to score land use intensity, this dataset leverages AI to interpret complex ecological nuances (e.g., thermophily, physical barriers, seasonal cover) described in the OCS-GE standard.

References

The underlying conceptual framework for linking terrestrial vertebrate species to European land systems, as well as the baseline habitat descriptions, draws inspiration from:

O'Connor, L. M. J., Renaud, J., Dou, Y., Karger, D. N., Maiorano, L., Verburg, P. H., & Thuiller, W. (2024). Habitat Suitability of European Land Systems for Terrestrial Vertebrates. Global Ecology and Biogeography, 33(11), e13903.

Examples

data(ocsge_species_dict)
head(ocsge_species_dict)
#>      code_cs weight_global weight_movement weight_foraging resistance
#> 1 CS 1.1.1.1             1               1               1         10
#> 2 CS 1.1.1.2             1               1               1         10
#> 3 CS 1.1.2.1             3               6               4          5
#> 4 CS 1.1.2.2             5               7               5          4
#> 5   CS 1.2.1             3               8               3          4
#> 6   CS 1.2.2             9              10               6          1
#>           nom_espece
#> 1 Alytes_cisternasii
#> 2 Alytes_cisternasii
#> 3 Alytes_cisternasii
#> 4 Alytes_cisternasii
#> 5 Alytes_cisternasii
#> 6 Alytes_cisternasii