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flag Marine darkwaves—extreme underwater light drops from pollution and storms—are rising, harming ocean life, but sustainable land practices can help.

flag A new global study defines "marine darkwaves"—short-term, extreme underwater light reductions caused by sediment runoff, algal blooms, and climate-driven storms—that can last up to two months and severely harm kelp forests, seagrass, and light-dependent species. flag Led by New Zealand scientists and published in Communications Earth & Environment, the research uses 16 years of data from New Zealand and California to show these events, worsened by farming, forestry, and climate change, are becoming more frequent and intense. flag The study establishes a standardized measurement framework and highlights that land-based actions like reforestation and sustainable farming can reduce sediment runoff and mitigate impacts. flag Scientists are now using underwater soundscapes to assess ecosystem responses.

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