| Title | Raw seawater temperature data from the long-term monitoring of the microhabitats of intertidal invertebrates in Sea Point, 4 April to 9 May 2023 |
|---|---|
| Project | Conservation Physiology Programme |
| Authors |
Tanya Haupt Laurenne Snyders Liesl Janson Lutz Auerswald |
| Publisher | Department of Forestry, Fisheries and the Environment (2023) |
| Contributors |
Contact Person: Tanya Haupt |
| Abstract | 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. Three prominent rockpools were chosen in Sea Point, Cape Town (>5 m apart) to install HOBO TidbiT temperature loggers. Two loggers were placed in each pool. Here we present the raw temperature measurements from Pool 1: 33.920317 S, 18.379417 E, logger 10687237 and 20195550; Pool 2: 33.920267 S, 18.379417 E, logger 10687240 and 20195543; Pool 3: 33.920167 S, 18.379717 E, logger 20195539 and 20195574, from 4 April to 9 May 2023. |
| Methods | The details of each pool are captured in the 'README' file. The loggers were set to record temperature every 5 minutes. The current design is attaching loggers via cable ties to I-bolts drilled into the substrate. All loggers were positioned facing the sea. Data were extracted from the loggers using HOBOware Pro software and exported into Excel files. Times are GMT+2. The data available are the raw files (all temperatures even outside of the rockpools). |
| Data | |
| Temporal extent | 04 Apr 2023 – 09 May 2023 |
| Geographic extent |
Sea Point, Western Cape, South Africa
North: -33.920167 |
| Vertical extent |
Max: -0.068 m Min: -0.21 m |
| Keywords | Intertidal, Rockpools, SOUTH ATLANTIC OCEAN, Temperature |
| Related resources |
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