DOI: 10.5061/dryad.gmsbcc2xb
title: Data for: Greater plasticity in CTmax with increased climate variability among populations of tailed frogs lacking opportunity for behavioral thermoregulation

description: Temporally variable climates are expected to drive the evolution of
 thermal physiological traits that enable performance across a wider range
 of temperatures (i.e., climate variability hypothesis, CVH). Spatial
 thermal variability, however, may mediate this relationship by providing
 ectotherms with the opportunity to behaviorally select preferred
 temperatures (i.e., the Bogert effect). These antagonistic forces on
 thermal physiological traits may explain the mixed support for the CVH
 within species despite strong support among species at larger geographic
 scales. Here, we test the CVH as it relates to plasticity in physiological
 upper thermal limits (critical thermal maximum — CTmax) among populations
 of coastal tailed frogs (Ascaphus truei). We targeted populations that
 inhabit spatially homogeneous environments, reducing the potentially
 confounding effects of behavioural thermoregulation. We found that
 populations experiencing greater temporal thermal variability exhibited
 greater plasticity in CTmax, supporting the CVH. Interestingly, we
 identified only one site with spatial temperature variability and tadpoles
 from this site demonstrated greater plasticity than expected, suggesting
 the opportunity for behavioral thermoregulation can reduce support for the
 CVH. Overall, our results demonstrate one role of climate variability in
 shaping thermal plasticity among populations and provide a baseline
 understanding of the impact of the CVH in spatially homogeneous thermal
 landscapes.
description: # Data for: Greater plasticity in CTmax with increased climate variability
 among populations of tailed frogs lacking opportunity for behavioral
 thermoregulation
 [https://doi.org/10.5061/dryad.gmsbcc2xb](https://doi.org/10.5061/dryad.gmsbcc2xb) ## Description of the data and file structure These are the data and code for all analyses in the associated manuscript. Information on each file is given below. ### Files and variables #### File: 2019\_OR\_MicroTemp\_10282019.csv **Description:** This file contains the spatial temperature dataset for Oregon sites/populations. Empty cells denote non-applicable data (e.g., measurement would have occured but a large boulder was in the location). ##### Variables * Site - area/ population * Date - when data collection occurred * Personnel - who collected the data * Start_Time - time when surveys began * Width_0_1 - grouped width of the stream (0 denotes &lt;3m, 1 denotes &gt;3m) * Sample_Number - number of temperature measurement * Bottom_Temp_C - temperature at that point (degrees C) #### File: HoboWYFiles.zip **Description:** This zipped file contains the .csv and .txt versions of the in-stream temperature logger data. File naming convention: [state]*[site]*[upstream or downstream logger]_[dates encompassed]. .txt files contain a subset of data compared to the .csv files: txt files contain only V1 and Temp (see variables description below). ##### Variables * V1 - date and time * Temp - Temperature in degrees C * Dim - dimension of temperature measurement (e.g., spatial or temporal). These are all temporal. * Site - area/population #### File: Plasticity\_data.csv **Description:** This file contains individual-level data from CTmax experiments. Note that empty cells denote missing data. Missing data are detailed in the corresponding manuscript. ##### Variables * Site - population sampled * State - state in USA * DateCollected - date of tadpole collection from the field * Species * St.Temp - stream temperature (degrees C. Blank cells denote missing data. * Location - where experiments took place * RoomTemp. - room temperature (degrees C) at the beginning of CTmax experiment. Blank cells denote missing data. * Start_Time - start time of ctmax experiment * End_Time - end time of ctmax experiment * Start_Temp - start temp of ctmax experement * Start_Temp_F - treatment of the start temperature for the CTmax experiment (either 8 or 15) * Exp._Name - experiment ID * Date - of the experiment * Accl._Time - time (days) held at holding temperature * Accl._Temp. - Holding temperature (degrees C) * Treatment - one of A,B,C,D representing different holding and starting temperature combinations (A- 8 accl 8 test; B test 8 accl 15; C test 15 accl 8; D test and accl 15) * Observers - IDs of observers for CTmax experiments * Heater * Channel_# - individual mesh container during experiment * Recovered? - Y/N * CTX_ID - experiment ID including channel * FullID - Individual ID * Ctmax - in degrees C * Site_elevation_(m) * Gosner_Stage * Stager - Identifier of who staged the tadpole. Note: consensus represents all stagers * Length1 - First length measurement of the tadpole (cm). Blank cells denote non-applicable data (damage or missing photo). * Length2 - Second length measurement of the tadpole (cm). Blank cells denote non-applicable data (damage or missing photo). * LengthAvg - Average length of tadpole (cm). Blank cells denote non-applicable data (damage or missing photo). * Person - Person ID who measured the tadpole ## Code/software Code for data analysis and figure creation for this manuscript is included as a separate [Rmd] file through Zenodo.