Clément Tremblin grew up on Réunion Island, a small volcanic island in the Indian Ocean where the ocean is not a destination but a way of life. That origin, far from any major research institution and shaped by a coast rather than a curriculum, instilled in him both a personal urgency and a particular clarity about what science is ultimately for.

His PhD, supported by the Forrest Research Foundation, addresses one of the most consequential questions facing Western Australia’s coastal ecosystems: which populations of Posidonia australis, a slow-growing, near-threatened seagrass endemic to temperate Australian waters, possess the thermal resilience needed to survive escalating marine heatwaves, and how can that knowledge be translated into climate-informed restoration before irreplaceable genetic diversity is permanently lost?

Tremblin’s approach is distinctive in its integration of timescales. By reading growth histories encoded in seagrass rhizomes through lepidochronology, monitoring the flowering and fruiting dynamics of populations across an 800-kilometre latitudinal gradient, and experimentally stress-testing seedlings from thermally contrasting populations translocated in new nursery habitat. Some of his findings have already challenged prevailing assumptions: northern populations of P. australis seedlings, despite displaying the greatest absolute thermal tolerance, operate within critically narrow thermal safety margins, making them not refugia but frontline populations at acute risk, whose thermally adapted genotypes could be eliminated by a single severe warming event.

Trained at the University of Western Australia and Edith Cowan University, Tremblin is committed to research that moves beyond observation into action, giving conservation managers the evidence they need to make better decisions about which populations to protect and where limited resources will have the greatest impact.