Data: Reduced climate adaptation at range edges in North American Arabidopsis lyrata

Aim: Species’ range limits, when not caused by dispersal limitation, are the result of constraints to the evolution of the ecological niche such that further range expansion is slow or not possible. An important evolutionary constraint at range edges may be the enhanced action of genetic drift. Here we tested whether a history of small population size and enhanced genetic drift was linked with reduced adaptation at range limits.
Location: Eastern North America
Time period: 2017-2019
Taxon: Arabidopsis lyrata subsp. lyrata
Methods: We performed a latitudinal transplant experiment with sites across and beyond the species distribution of North American Arabidopsis lyrata. Plants originated from the centre and the periphery, and the latter shared a history of range expansion or long-term isolation and had low genetic diversity. We tested for adaptation by considering climatic variables that had previously been associated with both niche and range limits.
Results: Multiplicative performance..., Data was collected from a field transplant experiment in the US from 2016 to 2018., , # Data: Reduced climate adaptation at range edges in North American Arabidopsis lyrata

Place of study: Eastern USA

NOTE 1: data on between-population crosses are included that were not analysed in this study

NOTE 2: Revisions were made to this readme and the file POP_PERFORMANCE_19 in January 2024. Data on time to flowering (Flow_T) is now in the format as analyzed. Furthermore, we now describe more precisely how severity of damage on rosettes (ROS_DMG_18[fraction]) and inflorescences (INFLO_MEAN_DMG_18[fraction]) was recorded.

## Description of the data and file structure

DELTA_DATA: is the data file that contains all the ecological variables (temperature and precipitation) for each common garden and each population

Explanation of variables:

M_POP: site of origin of the population, first two letters indicating the state, or the province in Canada

MIN_T_MARCH: minimum temperature in mach at the population site based on WORLDCLIM data

MIN_T_APRIL: minimum temperature in A...