Even protected Florida wetlands can't escape microplastic pollution
Microplastics are turning up almost everywhere—from oceans and rivers to soils and sediments—yet far less is known about what happens when they enter freshwater wetlands. Often overlooked in favor of marine and coastal environments, wetlands can act as both pathways and traps for microplastics, potentially capturing and retaining pollution.
Microplastics have been discovered in 38 out of 40 sediment samples from Spruce Bluff Preserve, a freshwater wetland in Florida. These tiny particles, most of which were smaller than 2.5 millimeters, were found in every ecological zone of the preserve. The study, conducted by researchers from Florida Atlantic University, found that the concentration of microplastics was significantly higher near the St. Lucie River and an outlet canal used for flood control.
This suggests that water movement plays a crucial role in transporting and concentrating these pollutants within the wetland. Fibers, which are often linked to synthetic textiles and urban runoff, were the most common type of microplastic detected. The findings highlight the need to consider microplastic pollution when protecting and managing these ecosystems, as they can act as both pathways and traps for this pollution, even in protected areas.
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