Uncovering the cause of breakup between species' range limits and niche limits under climate warming

Aim: Global climate change has been linked to shifts in species' geographic and elevational distributions, with taxa varying in responsiveness. This variation may be due to a time lag of the response or climate alone not being a simple determinant of distribution limits. To tease apart the role of climate in distribution, we compared the temperature response of predicted occurrence revealed by ecological niche modelling (ENM) on historical climate with that of performance in a multi-population transplant experiment. Congruence would support that climate is a main driver of distribution limits of a species.
Location: North America.
Taxon: Arabidopsis lyrata subsp. lyrata.
Methods: Seeds of 20 populations of North American Arabidopsis lyrata from across the entire range were collected, propagated and then sown along a latitudinal transect across and beyond the species' range. Lifetime performance was related to niche-and range-determining climatic variable revealed by ENM.
Results: Lifeti..., The Arabidopsis lyrata occurrence data set was compiled with data from Lee-Yaw et al. (2018, Ecography, doi: 10.1111/ecog.02869), the GBIF database with occurrence data entries after 1960 (GBIF.org, September 14, 2022), and various herbaria collections. The thinned data set contains 433 occurrences/entries, each with information on: sample identity (point_ID), latitude, longitude, and the source of information.
, , # Occurrences of *Arabidopsis lyrata* subsp. *lyrata* - thinned data set

[https://doi.org/10.5061/dryad.bcc2fqzkp](https://doi.org/10.5061/dryad.bcc2fqzkp)

## Description of the data and file structure

The data set (Jbi14796_occurrencesAlyrata_thinned_20251209.txt) contains occurrences of *Arabidopsis lyrata* subsp. *lyrata*, after thinning to the median Euclidean distance among occurrences (i.e., c.a. 10–11 km). Each row refers to one occurrence point (N = 433) and includes information on sample identity (as used by the source, e.g., GBIF), latitude [°N, +] and longitude [°W, -]. Latitude and longitude data from other public repositories can be found there and marked as \"disclosed\" in this data.
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