Sun exposed temperature data from Sea Point, 07 May to 07 June 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 May to 07 June 2021.

为深入探究海洋无脊椎动物对环境条件变化的生理效应，有必要进行长期监测，以捕捉环境参数的自然变异性。通过这种方式，可以将实验结果与野外条件相联系，并更准确地预测海洋无脊椎动物，尤其是在恶劣的潮间带，如何应对气温的上升。2020年5月，我们从南非西南海岸的海点地区的潮间带岩石池中收集了海胆（学名：Parechinus angulosus）。在海点林业、渔业和环境保护部（DFFE）的海点研究水族馆进行长期孵化后，近期实验中对其对热应激的反应进行了研究。为了计算这些海洋无脊椎动物的热窗，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），即生物表现出不协调运动温度获得，而栖息地温度则通过在生物栖息的潮间池中部署温度记录器获得。除了记录在南非开普敦海点的岩石池温度外，还在附近的建筑上安装了一个HOBO TidbiT温度记录器：33.92074 S，18.38051 E，以记录阳光直射位置的温度。这种安装方式可作为完全暴露在岩石上的替代方案，后者可能面临被盗的风险。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5月7日至6月7日的温度测量数据的整理版本。