Experiments suggest that ash from wildfires boosts the growth of phytoplankton in seawater – which might have positive or negative effects on other wildlife
Satellite photo of smoke from the Thomas Fire in California in 2017. Burning areas are outlined in redthat falls in the ocean can provide nutrients that boost the growth of microorganisms – but the impact on the wider ecosystem is unknown.
In 2017, the Thomas Fire in California is estimated to have produced between 0.7 billion and 2.4 billion kilograms of ash, much of which ended up in the Pacific Ocean. To investigate the impact of wildfires on marine microorganisms,at Western Washington University and her colleagues collected samples of ash from the area burned by the Thomas Fire and mixed it with water from the sea nearby.
“We didn’t see any toxic effects”, says Ladd. “Most of the stuff in the community appeared to benefit from it.”
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