Physiological thermal niches, elevational ranges and thermal stress in dendrobatid frogs: An integrated approach

Aim: We investigated the relationship between thermal physiology, elevational distribution, and thermal stress among nine closely related dendrobatid frogs during their aquatic stage by employing an integrated approach, combining thermal physiology, environmental temperature modelling, and predictive assessments of current and future exposure to thermal variation.
Location: Ecuador
Taxon: Amphibians; Anura, Dendrobatidae, Epipedobates, Hyloxalus
Methods: We determined the Thermal Performance Curves of larval growth (TPCs) for each species and modelled the thermal variation in contrasting aquatic larval environments for both present and future times. This allowed us to estimate the expected elevational distributions and forecast periods of exposure to stressful temperatures that inhibit larval growth due to elevation and global warming.
Results: We found significant correlations between optimum temperature (Topt), 50 % maximum performance temperature (maxB50), 50% minimum performance tem..., Selection of Species
We sampled nine Ecuadorian frogs belonging to the family Dendrobatidae during their larval stage, covering a wide elevational range in Ecuador ranging from 38 - 1900 m, between latitudes 1ºN - 4ºS). We focused on five out of the six species of Epipedobates found on the coastal side of Ecuador, as well as four species of Hyloxalus from the Amazonian slope out of the twenty-seven that can be found throughout the country (Ron, et al. 2020; for more information see supplementary Table S1 and Fig. S6). One population of each species was collected from their natural aquatic habitats from December 2014 to April 2016 and transported to the experimental facilities in the Pontificia Universidad Católica del Ecuador (PUCE). However, for three species (Epipedobates machalilla, E. tricolor and Hyloxalus nexipus) we sourced specimens from ‘Balsa de los Sapos’ initiative PUCE. It is important to note that the specimens from captive breeding were first- or second-generation breeds,..., , # Physiological thermal niches, elevational ranges and thermal stress in dendrobatid frogs: an integrated approach

[https://doi.org/10.5061/dryad.d51c5b094](https://doi.org/10.5061/dryad.d51c5b094)

This is the data supporting our publication in Journal of Biogeography. We have included data on water temperatures of aquatic habitats inhabited by various Ecuadorian amphibian species, as well as physiological data on CTmax, CTmin, and thermal performance curves (TPC) for different dendrobatid species from the western (*i.e. Epipedobates* genera) and eastern (*i.e. Hyloxalus* genera) slopes of Ecuador. 

Additionally, the name of the species *E. darwinwallacei* has been recently changed to *E. espinosai* as both species were found to be synonymous according to a recent article (López-Hervas et al., 2024, [https://doi.org/10.1016/j.ympev.2024.108065)](https://doi.org/10.1016/j.ympev.2024.108065\)). 

## Description of the data and file structure

The data contained in five .txt files.

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# 箭毒蛙的生理热生态位、海拔分布范围与热胁迫：一项整合性研究

## 研究目标
本研究采用整合性研究方法，结合热生理学实验、环境温度建模以及当前与未来热暴露变化的预测评估，探究9种近缘箭毒蛙科（Dendrobatidae）物种在水生幼体阶段的热生理特征、海拔分布与热胁迫之间的关联。

## 研究区域
厄瓜多尔

## 分类类群
两栖动物；无尾目（Anura）、箭毒蛙科（Dendrobatidae）、箭毒蛙属（Epipedobates）、Hyloxalus属

## 研究方法
本研究测定了各物种幼体生长的热性能曲线（Thermal Performance Curves, TPCs），并对当前及未来不同水生幼体生境中的热环境变化进行建模。借此我们得以估算预期的海拔分布范围，并预测因海拔变化与全球变暖导致的抑制幼体生长的胁迫性温度暴露时段。

## 研究结果
本研究发现最适温度（Topt）、50%最大性能温度（maxB50）、50%最低性能温度（……）之间存在显著相关性……

## 物种选取
本研究采集了9种厄瓜多尔箭毒蛙科（Dendrobatidae）物种的幼体样本，其采样覆盖厄瓜多尔境内38~1900米的宽海拔梯度，分布纬度范围为1°N~4°S。研究选取了厄瓜多尔沿海地区分布的6种箭毒蛙属（Epipedobates）物种中的5种，以及全国范围内27种Hyloxalus属物种中来自亚马逊坡地的4种（Ron等，2020；更多信息详见补充表S1与补充图S6）。2014年12月至2016年4月期间，我们从各物种的自然水生生境中采集单个种群样本，并转运至厄瓜多尔天主教大学（Pontificia Universidad Católica del Ecuador, PUCE）的实验设施。但对于Epipedobates machalilla、E. tricolor以及Hyloxalus nexipus这3个物种，我们的标本来自PUCE的“Balsa de los Sapos”繁育项目。需要说明的是，繁育种群的标本均为第一代或第二代人工繁育个体……

本数据集的DOI链接：[https://doi.org/10.5061/dryad.d51c5b094](https://doi.org/10.5061/dryad.d51c5b094)

本数据集支撑发表于《生物地理学杂志》（Journal of Biogeography）的研究论文，数据集包含厄瓜多尔多种两栖动物水生生境的水温数据，以及来自厄瓜多尔西部（即箭毒蛙属（Epipedobates））与东部（即Hyloxalus属）坡地的不同箭毒蛙科物种的临界热最大值（Critical Thermal Maximum, CTmax）、临界热最小值（Critical Thermal Minimum, CTmin）及热性能曲线（TPC）等生理数据。

此外，根据近期研究（López-Hervas等，2024，https://doi.org/10.1016/j.ympev.2024.108065），*E. darwinwallacei* 现已被修订为 *E. espinosai*，二者被认定为同物异名。

## 数据与文件结构说明
本数据集包含5个.txt格式文件。**……**