Sun exposed temperature data from Sea Point, 07 July to 07 August 2021

To better understand the physiological effects of marine invertebrates to changing environmental conditions, long-term monitoring which captures the natural variability of environmental parameters is required. In this way, experimental findings can be related back to field conditions, and better predictions can be made as to how marine invertebrates, particularly in the harsh intertidal, will fair with rising temperature. In May 2020, Cape Sea Urchins, Parechinus angulosus, were collected from intertidal rock pools at Sea Point, which is situated along the southwest coast of South Africa. After chronic incubation in low pH conditions at the Department of Forestry, Fisheries and the Environment's (DFFE) Sea Point Research Aquarium, their response to thermal stress was investigated in recent experimental trials. To calculate the thermal window for these marine invertebrates, both habitat temperatures, as well as their threshold temperatures are required. The latter was obtained by examining the Critical Thermal Maximum temperatures (CTmax), i.e. the temperatures at which organisms respond with uncoordinated mobility, whereas habitat temperatures are available through the deployment of temperature loggers in the intertidal pools inhabited by these organisms. Apart from rockpool temperatures recorded in Sea Point, Cape Town, a HOBO TidbiT temperature logger was also installed on a nearby structure: 33.92074 S, 18.38051 E to record temperature in a sun-exposed position. An alternative to placement on fully exposed rocks where it would be subjected to theft.This data will allow for an indication of the most extreme temperatures in the vicinity of the pool. Here we present the cleaned up version of the temperature measurements from the 07 July to 07 August 2021.

为了更深入地理解海洋无脊椎动物对环境变化的生理效应，需要长期的监测，以捕捉环境参数的自然变异性。通过这种方式，实验结果可以与实地条件相对应，并能够对海洋无脊椎动物，尤其是恶劣的潮间带区域，在温度上升情况下的适应性做出更准确的预测。2020年5月，我们从南非西南海岸的Sea Point潮间带岩石池中收集了海胆（Parechinus angulosus）。在南非林业、渔业和环境部（DFFE）Sea Point研究水族馆的低pH条件下进行长期孵化后，最近的研究试验中调查了它们对热应激的反应。为了计算这些海洋无脊椎动物的热量窗口，既需要栖息地温度，也需要它们的阈值温度。后者通过检查临界热最大温度（CTmax），即生物体表现出不协调运动能力的温度而获得，而栖息地温度则可通过在这些生物栖息的潮间池中部署温度记录器来获取。除了记录在南非开普敦Sea Point的岩石池温度外，还在附近的建筑物上安装了一个HOBO TidbiT温度记录器，位置为33.92074 S, 18.38051 E，以记录暴露在阳光下的温度。这是放置在完全暴露的岩石上的替代方案，后者可能会遭受盗窃。这些数据将有助于指示池周围最极端的温度。在此，我们展示了2021年7月7日至8月7日的温度测量数据的整理版本。