Colonizing polar environments: thermal niche evolution in Collembola
Data files
Oct 04, 2023 version files 12.94 KB
-
README.md
-
Table_S1_2REV.csv
Abstract
Temperature is a primary driver in defining the ecophysiological activity and performance of ectotherms. Thus, thermal tolerance limits have a profound effect in determining geographic ranges. In regions with extreme cold temperatures, lower thermal limits of species are a key physiological trait for survival. Moreover, thermal niche breadth also plays an important role in allowing organisms to withstand climatic variability and confers species with broader potential to establish in new regions. Here we study the evolution of thermal tolerance limits among Collembola (Arthropoda) and explore how they are affected by the colonization of polar environments. In addition, we test the hypothesis that globally invasive species are more eurythermal than non-invasive ones. Critical thermal limits (CTmin and CTmax), classic measurements of thermal tolerance, were compiled from the literature and complemented with experimental assays for springtail species. Genetic data of the mitochondrial gene cytochrome oxidase subunit 1 (COI) was used to assemble a phylogeny. Our results show that polar springtails have lower CTmin and lower CTmax compared to species from temperate and tropical regions, consistent with the Polar pressure hypothesis. We found no phylogenetic signal for CTmax, but low values of phylogenetic signal for CTmin. Globally invasive species do not have significantly broader thermal tolerance breadth (CTrange) than non-invasive ones, thus not supporting the predictions of the Eurythermality hypothesis. We conclude that polar springtails have evolved their thermal niches in order to adapt to extremely cold environments, which has led to decreasing both upper and lower thermal tolerance limits.
README: Colonizing polar environments: thermal niche evolution in Collembola
Description of the Data and file structure
- Sp: Species
- n_max: Number of individuals for CTmax
- ctmax_mean: Mean of CTmax
- sd_ctmax: Standard deviation of CTmax
- n_min: Number of individuals for CTmin
- ctmin_mean: Mean of CTmin
- sd_ctmin: Standard deviation of CTmin
- ctrange: Range of CT (CTmax + CTmin)
- locality: Region of collection
- status: If the species is considered invasive or native
- reference_status: Reference of the invasive/native status
- reference_ct: Reference of the CT value
- code_COI: Code of the sequence
- source: Website of the sequence
- ramping_rate: Experimental ramp in ºC/minute
- acclimation_temp_ºC: Acclimation temperature in ºC
- acclimation_time: Acclimation time in hours, weeks or generations (F2)
- cat_acc_time: Category attributed to acclimation time
- arr_mean_ctmax: Mean of the acclimation response ratio for CTmax
- arr_mean_ctmin: Mean of the acclimation response ratio for CTmin
- ctmax_duration_trial: Duration trial for CTmax in minutes
- ctmin_duration_tiral: Duration trial for CTmin in minutes
NA: mean that we do not know the data
Sharing/access Information:
https://doi.org/10.1016/j.cris.2021.100023