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It's getting cold in Lesotho

08 July 2022

Logger reveals just how cold it gets in a pond at 3 300 m asl

In March 2021, the MeaseyLab visited the Lesotho highlands as the final stop in an altitudinal transect for Laurie's study of African clawed frog physiology (see blog post here). A year later, I went to retrieve the temperature loggers (see blog post here), but the Lesotho logger had disappeared in a flood. Happily, we have friends in Lesotho, and Bongani Ntloko agreed to deploy a logger in a pond where Xenopus laevis  occur in the highest areas of Lesotho. 

In this first picture, you can see the pond where the logger was deployed in March 2022. Note the string that snakes into the middle of the pond which has the logger on the end of it.

In the next picture, taken in July 2022, you can clearly see the ice on the pond and the snow on the hill. The skies are still very blue!

 

In the graph below you can see how the temperature of the water has decreased from March to July. We would not expect temperatures to go below zero, but the logger shows that it gets very close to freezing in this pond.

Thanks very much to Bongani and his team for their help with obtaining this data. It will be invaluable together with Laurie's results in her work on the physiology of this population.

  Frogs  Lab  Xenopus
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