Stevens, Amelia V., Lautgier, Bree Ann, Hoyle, Gemma L., Guja, Lydia K., Worboys, Stuart, Crayn, Darren M., and Sommerville, Karen D. (2026) Germination of Dracophyllum sayeri F.Muell. (Ericaceae), a vulnerable montane cloud forest endemic. Plant Species Biology, 41. e70044.

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Abstract

Climate change in tropical montane cloud forest (TMCF) is predicted to impact species adapted to consistent, mild temperatures. We used a temperature gradient plate to investigate the effect of temperature on germination and early seedling survival of Dracophyllum sayeri (Ericaceae), a tree species endemic to TMCF in northeast Queensland, Australia. Despite a narrow distribution, results suggest that a wide range of temperatures is conducive to germination of D. sayeri, including up to 8°C higher than current temperatures. At higher temperatures, a day/night temperature amplitude of at least 5°C was required for optimal germination. In addition, germination was greater when seeds were exposed to natural diurnal light compared to constant darkness. Based on temperature, predictions under future climate conditions include a shift in peak germination from summer to winter/early spring. Results also suggest that D. sayeri has multiple strategies for maximizing germination in warm, alternating temperatures and light-filled gaps, and possesses more acclimation potential to persist under a future climate than previously assumed.

Item ID:	90935
Item Type:	Article (Research - C1)
ISSN:	1442-1984
Keywords:	Dracophyllum, light, seed germination, temperature gradient plate, tropical montane cloud forest
Related URLs:	https://www.scopus.com/inward/record.uri...
Copyright Information:	This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2026 Commonwealth of Australia and The Author(s). Plant Species Biology published by John Wiley & Sons Australia, Ltd on behalf of The Ecological Society of Japan.
Date Deposited:	25 Mar 2026 02:30
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