David Roy Clements

David Roy Clements is a Professor of Biology at Trinity Western University’s Faculty of Natural & Applied Sciences. His expertise spans invasive species biology, weed science, and climate change ecology. Clements holds a BSc from Western University (1986) and a PhD from Queen’s University (1991), with postdoctoral research at the University of Guelph. He teaches botany and ecology courses, including field studies in Salt Spring Island and Hawai’i.

• Research focuses on invasive riparian plants, Garry oak ecosystems, and climate change impacts, yielding over 80 publications.
• Manages TWU’s field research sites, including the Blaauw Eco Forest and Crow’s Nest Ecological Research Area.
• Conducts fieldwork in Yunnan Province, China, studying the invasive Mile-a-minute plant.

He served as President of the Canadian Weed Science Society (2013–2014) and holds editorial roles in journals such as Weed Research and Invasive Plant Science and Management. Clements co-edits series on invasive species for Pacific Science and Invasive Plant Science and Management. His research has been funded by NSERC, SSHRC, and municipal contracts totaling over $200,000 in recent years.

• Recent grants include studies on climate change’s impact on invasive species in riparian habitats and resilience in Burnaby’s Central Park.
• Recipient of the 2014 Canadian Weed Science Society Excellence in Weed Science and 2009 Langley Environmental Stewardship Award.

Active in conservation, Clements co-founded A Rocha Canada and serves on its science advisory board. He contributes to local stewardship groups, writes the Green Beat column for the Langley Advance Times, and maintains a research blog.