Sun exposed temperature data from Sea Point, 12 March to 12 April 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 12 March to 12 April 2021.

为了更深入地理解海洋无脊椎动物对环境变化产生的生理效应，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，可以将实验发现与实地条件相联系，并更准确地预测海洋无脊椎动物，特别是在恶劣的潮间带，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）的Sea Point研究水族馆中进行长期孵化，pH值低的环境中，最近进行的实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耐受窗口，需要同时考虑栖息地温度和它们的阈值温度。后者通过检查临界热最大温度（CTmax）获得，即生物体表现出不协调运动温度，而栖息地温度则通过在这些生物栖息的潮间池中部署温度记录仪获得。除了在开普敦Sea Point记录的岩石池温度外，还在附近的建筑物上安装了HOBO TidbiT温度记录仪：33.92074 S，18.38051 E，以记录阳光直射位置的温度。这是放置在完全暴露的岩石上的替代方案，以避免被盗。这些数据将有助于指示池周围的极端温度。在此，我们展示了2021年3月12日至4月12日温度测量的清理版本。