We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
From species-specific behaviour to ecosystem risk: Upscaling our understanding of microplastic impacts on marine soft sediment ecosystem functions
Summary
Scientists found that microplastics disrupt tiny burrowing sea creatures' ability to churn and clean ocean-floor sediment, shrinking their "cleanup zones" by up to 65%. Since these creatures help recycle nutrients and keep coastal ecosystems healthy, this disruption could ripple outward—affecting water quality and the seafood systems humans rely on. While this study focuses on ecosystem health rather than direct human health effects, it's a reminder that plastic pollution can quietly undermine the natural processes that keep our oceans (and the food we get from them) functioning properly.
Evidence of microplastic-ecosystem impacts is growing; however, our capacity to evaluate associated risks to Earth system processes remains limited. Upscaling impacts and risk assessment in the natural environment usually require a careful balance of accuracy and precision accounting for heterogeneity in ecosystem processes. Intermediate steps between controlled experiments and broad-scale prediction are necessary to fully appreciate the magnitude and implications of plasticising the planet. We explored the potential to change critical ecosystem feedback processes and how these effects can propagate across heterogeneous habitats on intertidal flats. Microplastics (>0.0002 g cm) shrank the bioturbation hotspots by 65% at maximum, affecting the landscape of M. stewartensis in regulating the remineralisation across the surveyed sandflat. Behavioural changes in key species can cascade through their functional roles in regulating food resources, thereby amplifying the impacts of microplastics on habitat degradation. This conceptual framework provides a basis for integrating ecosystem feedback into microplastic risk evaluation.