Acknowledgements
We thank all field volunteers who have helped to collect the data
presented in this manuscript over the years. We especially thank Antoine
Millet for sampling and processing stickleback, and collecting
temperature data. These surveys were conducted under the auspices of the
Mývatn Research Station, which has government approval for collecting
fish specimens from the lake. This work was supported by the Icelandic
Research Fund, grant of excellence (195571-052).