Title Raw sun exposed temperature data from Sea Point, South Africa, 28 September to 12 November 2020
Project Conservation Physiology Programme
Authors

Tanya Haupt
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Production Scientist 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, THaupt-Schuter@environment.gov.za

Laurenne Snyders
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Technician 2nd Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, LSnyders@environment.gov.za

Lutz Auerswald
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE) Specialist Scientist 5th Floor, Foretrust Building, 1 Martin Hammerschlag Way, Cape Town, South Africa, lutz.auerswald@gmail.com

Publisher Department of Forestry, Fisheries and the Environment (2020)
Contributors

Contact Person: Tanya Haupt
Oceans and Coastal Research, Department of Forestry, Fisheries and the Environment (DFFE); role: Production Scientist; contact details: email: THaupt@dffe.gov.za

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 Environment, Forestry and Fisheries' (DEFF) 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 raw temperature measurements from 28 September to 12 November 2020.
Methods The details of the logger placement is captured in the "README" file. The logger was set to record temperature every 5 minutes. Data were extracted from the logger using HOBOware Pro software and exported into Excel files. Times are GMT+2. The data available are the raw files (all temperatures recorded before placement and removal in its current position).
Data
Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Temporal extent 28 Sep 2020 – 12 Nov 2020
Geographic extent

Sea Point, Western Cape, South Africa

Lat: -33.92074
Lon: 18.38051

Keywords logger, Microhabitat, Sea Point, SOUTH AFRICA, SOUTH ATLANTIC OCEAN, sun exposed temperature
Related resources
  • This digital object is part of Long-term monitoring of seawater temperature in the microhabitats of intertidal marine invertebrates in Sea Point, South Africa (10.15493/dea.mims.26052350)