Sun exposed temperature data from Sea Point, 13 April to 07 May 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 13 April to 07 May 2021.

为了深入理解海洋无脊椎动物对环境变化生理效应的响应，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，可以将实验结果与实地条件相联系，并对海洋无脊椎动物，尤其是在严酷的潮间带，如何应对气温上升做出更准确的预测。2020年5月，从南非西南海岸的Sea Point潮间带岩石池中收集了海胆Parechinus angulosus。在林业、渔业和环境部（DFFE）的Sea Point研究水族馆中进行了低pH条件下的慢性孵化后，近期实验中对它们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，还需要它们的阈值温度。后者通过检测临界热最大温度（CTmax）获得，即生物体在无协调运动时响应的温度，而栖息地温度则通过在这些生物体栖息的潮间池中部署温度记录器来获得。除了在开普敦Sea Point记录的岩石池温度外，还在附近的结构上安装了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。这是一种替代完全暴露在岩石上的放置方式，以避免被盗。这些数据将有助于指示池附近的极端温度。在此，我们展示了2021年4月13日至5月7日温度测量的整理版本。