Drift logs are damaging intertidal ecosystems in B.C., study finds.

A University of Victoria study found 20–80% fewer barnacles on rocks exposed to drift logs and reports a roughly 520% increase in drift logs along western B.C. shores since the late 19th century.

A University of Victoria study examined how floating drift logs affect the intertidal zone along British Columbia’s west coast. The logs move with the tides and repeatedly strike rocks and shorelines. Researchers reported fewer barnacles on surfaces exposed to moving logs than in protected crevices. The team used satellite imagery and archival photos to measure log abundance over time. Key points: - Researchers found 20 to 80 percent fewer barnacles on rocks exposed to drift logs compared with protected crevices. - The study’s imagery analysis showed about a 520 percent increase in visible drift logs along western B.C. and Haida Gwaii since the late 19th century, with many logs linked to the logging industry. - The authors identified log booms and storm breakups as contributors to loose logs accumulating on shores. - The provincial government said the forestry sector is shifting more to barges, noted there are 53 licensed salvagers, and reported about 140 truckloads of salvaged logs in the past year. Summary: The study indicates loss of habitat-forming species in intertidal zones where drift logs are frequent, which can reduce food availability for other shore and marine species. Provincial officials described changes in transportation practices and ongoing salvage activity as measures expected to reduce loose logs over time. Undetermined at this time.