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

为深入探究海洋无脊椎动物对环境变化生理效应的理解，需进行长期监测，以捕捉环境参数的自然变异性。通过此种方法，实验结果可关联至野外条件，进而对海洋无脊椎动物，尤其是在恶劣的潮间带，如何应对温度上升做出更为精准的预测。2020年5月，来自南非西南海岸Sea Point潮间带岩石池中的海胆（Parechinus angulosus）被采集。在南非林务、渔业与环境保护部（DFFE）Sea Point研究水族馆的长期低pH条件下孵化后，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，不仅需要栖息地温度，还需其阈值温度。后者通过检测临界热最大温度（CTmax），即生物出现无协调运动反应的温度而获得，而栖息地温度则可通过在生物栖息的潮间池中部署温度记录器来获取。除了记录在Sea Point、开普敦的岩石池温度外，还在附近的建筑上安装了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。这是在完全暴露的岩石上放置记录器的替代方案，后者可能遭受盗窃。这些数据将有助于指示池附近最极端的温度。在此，我们呈现了2021年6月7日至7月7日的温度测量数据的整理版本。