Code from: The role of intrinsic factors in explaining range shifts of European breeding birds: A meta-analysis

Species are shifting their distribution ranges in response to climate and land-use change. However, the observed range shift patterns are idiosyncratic in rate and direction. Species traits, such as ecological, life-history and movement traits, may play an important role in determining range shifts by influencing a species’ capacity to shift successfully. Whilst several studies investigate the role of different species traits in driving range shifts, they generally consider few traits and range shift types. Range shift types such as abundance shift and centroid shift are generally not taken into account. Drivers of range shifts may however differ per range shift type. We conducted a meta-analysis to uncover the role of intrinsic factors (9 species functional traits and 5 spatial abundance characteristics), in explaining six contemporary range shift types ( range size changes: expansion/contraction, relative change and rate of change; latitudinal shifts: abundance shift, centroid shift a..., , # The role of intrinsic factors in explaining range shifts of European breeding birds: A meta-analysis

Dataset DOI: [10.5061/dryad.wstqjq2z5](10.5061/dryad.wstqjq2z5)

## Description of the data and file structure

R scripts from: The role of intrinsic factors in explaining range shifts of European breeding birds: a meta-analysis. Refer to the material and methods section for data collection. The underlying data used for this study were sourced from freely available publications as listed in the paper.

### Files and variables

#### File: Warmer_et_al._Appx7.R

**Description:** R script for the calculation of the species thermal maximum, minimum, and range, as well as the calculation of the historical range variables.

This script filters bird-occurrence records and extracts climate data to calculate each species’ thermal maximum, minimum, and range using buffered temperature values. It also derives historical range metrics (range size and northern limit) from presence records.

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