Alex McLachlan ‘Eyebrights at risk of climate change?’

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Thursday, 27 October 2022 - 12:30pm to 1:30pm
Euphrasia collina ssp diversicolour provided by A McLachlan
Euphrasia collina ssp diversicolour provided by A McLachlan

Alex will present results from his research project on alpine and sub-alpine eyebrights (Euphrasia). He is improving understanding of their dormancy, germination, and what effect climate change might have on these regeneration processes.


With the Australian alpine bioregion predicted to increase in temperature by up to 4°C by 2100, and snow cover reducing by up to 85%, impacts on flora are expected to occur. Eyebrights (Euphrasia) are a hemi-parasitic genus that is thought to rely on cold temperatures to alleviate seed dormancy to allow successful germination. This eye-catching genus is common in the Australian alps where walkers may have noticed the flowers in spring. The plants can help reduce erosion and naturally control grass populations while also providing resources for pollinators. This study aims to determine the impacts of increased temperature on Eyebrights seed dormancy, germination, and viability.


Alex McLachlan completed his undergraduate course Bachelor of Environmental science at the end of 2020 then worked at the seed bank in 2021, further developing his passion for native flora and conservation. He is currently undertaking a Bachelor of Applied Science (Honours) finishing in mid-November.

Lunchtime talks are held at 12.30 pm every Thursday from February to November.  Talks last for 1 hour.  We welcome a gold coins donation. The Friends use donations received at each talk to support Gardens’ programs and development and thank all those who have donated.  Please note: unless otherwise indicated, talks are in the ANBG Theatrette.

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The Friends of the ANBG thank the speakers who volunteer their time and talents to further the knowledge of all attending events in the Gardens. Some summaries or PowerPoint presentations of Thursday talks are available to Friends at the ANBG library. A donation to the Friends for the use of this material will be gratefully accepted. Please direct queries about the talks to the Thursday Talks Team: email

The talks are in line with COVID-19 guidelines which can change rapidly.