The thermal breadth of temperate and tropical freshwater insects supports the climate variability hypothesis

Climate change involves increases in mean temperature and changes in temperature variability at multiple temporal scales but research rarely considers these temporal scales. The Climate Variability Hypothesis (CVH) provides a conceptual framework for exploring the potential effects of annual scale thermal variability across climatic zones. The CVH predicts ectotherms in temperate regions tolerate a wider range of temperatures than those in tropical regions in response to greater annual variability in temperate regions. However, various other aspects of thermal regimes (e.g., diel variability), organisms’ size, and taxonomic identity are also hypothesised to influence thermal tolerance. Indeed, high temperatures in the tropics have been proposed as constraining organisms’ ability to tolerate a wide range of temperatures, implying that high annual maximum temperatures would be associated with tolerating a narrow range of temperatures. We measured thermal regimes and critical thermal limit...,   , , # The thermal breadth of temperate and tropical freshwater insects supports the climate variability hypothesis [https://doi.org/10.5061/dryad.9cnp5hqs1](https://doi.org/10.5061/dryad.9cnp5hqs1) **Primary article citation:** Dewenter, B. S., et al. (2024). \"The thermal breadth of temperate and tropical freshwater insects supports the climate variability hypothesis.\" Ecology and Evolution 14(2): e10937. DOI: 10.1002/ece3.10937. **Overview:** The data consists of three thermal traits: critical thermal maximum (CTmax), critical thermal minimum (CTmin), and thermal breadth (TB) of freshwater insect species from two elevation gradients in temperate eastern Australia (southern New South Wales, NSW) and tropical eastern Australia (northern Queensland, QLD). Also included are the associated measures of the thermal regimes at the sites where the freshwater insects were collected. TB = CTmax - CTmin. Also reported are the size of the insects in terms of their head width (mm) and their taxonomy,...气候变化表现为平均气温升高以及多时间尺度下的温度变异性改变，但现有研究极少考量这些时间尺度维度。气候变异性假说（Climate Variability Hypothesis, CVH）为探究不同气候区的年际尺度温度变异性潜在影响提供了概念框架。该假说预测，鉴于温带地区年际温度变异性更高，温带区域的变温动物相较于热带同类物种，能够耐受更宽的温度范围。不过，热环境的其他多项特征（如昼夜温度变异性）、生物体体型以及分类学归属，也被推测会对热耐受性产生影响。事实上，已有研究提出热带地区的高温会限制生物体耐受宽温度范围的能力，这意味着较高的年极端最高温会与较窄的温度耐受范围存在关联。本研究测定了热环境参数与临界热极限…… # 温带与热带淡水昆虫的热耐受宽度验证了气候变异性假说 [https://doi.org/10.5061/dryad.9cnp5hqs1](https://doi.org/10.5061/dryad.9cnp5hqs1) **核心文献引用：** Dewenter, B. S. 等 (2024). "The thermal breadth of temperate and tropical freshwater insects supports the climate variability hypothesis." *Ecology and Evolution*, 14(2): e10937. DOI: 10.1002/ece3.10937. **数据集概述：** 本数据集涵盖三类热性状数据：采自澳大利亚东部温带区域（新南威尔士州南部，NSW）与热带区域（昆士兰州北部，QLD）两个海拔梯度的淡水昆虫物种的临界最高温（critical thermal maximum, CTmax）、临界最低温（critical thermal minimum, CTmin）及热耐受宽度（thermal breadth, TB）。同时配套收录了淡水昆虫采集点的热环境测定数据。热耐受宽度计算公式为 TB = CTmax - CTmin。此外还记录了昆虫的头宽（mm）体型指标及其分类学信息……