As climate change intensifies harmful algal blooms worldwide, an international team led by Hiroshima University has developed a hybrid modeling approach that combines algal movement simulations, AI, and long-term monitoring data to sharpen forecasts of these bloom events—linked to environmental damage, mass fish die-offs, economic losses, and risks to human health.

A global study by the University of Basel, Switzerland, reveals a surprising picture: while 42 percent of treelines worldwide are shifting upslope, 25 percent are retreating. This seemingly contradictory trend involves more than just warming. Climate change and human land use are interacting.

This article highlights a "protection-pollution paradox" in no-take marine reserves (NTRs), where conservation-driven gains in fish biomass, body size, and trophic structure inadvertently increase the accumulation of legacy PCBs in apex predators. Climate change exacerbates this "toxic trap" by remobilizing sediment-bound contaminants and altering the toxicokinetics of marine organisms. To address this hidden threat, the authors advocate for an integrated management framework that combines climate-smart spatial planning, advanced biomonitoring, and targeted remediation. They emphasize shifting conservation metrics from simple biomass recovery to comprehensive ecosystem health to prevent NTRs from becoming inadvertent "toxic traps."