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Ocean Acidification Disrupts Shellfish Growth, Threatening Billions in Aquaculture

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Discovery

Curated by Surfaced Editorial·Climate·2 min read
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Researchers at the Woods Hole Oceanographic Institution (WHOI) have demonstrated that ocean acidification, driven by increased absorption of atmospheric CO2, is significantly hindering the shell formation of commercially important shellfish species. Experiments in controlled aquaria simulating future ocean conditions showed a 25% reduction in shell thickness and growth rates for oysters and clams exposed to lowered pH levels. The methodology involved rearing shellfish in waters with varying CO2 concentrations and meticulously measuring shell calcification and growth. This surprising finding implies a direct, measurable economic threat to the global aquaculture industry, currently valued at over $200 billion annually.

Why It’s Fascinating

Experts are highly alarmed because this study provides concrete, quantifiable evidence of ocean acidification's direct impact on key marine organisms, confirming that it's not just a theoretical threat. It overturns previous assumptions that some species might adapt more readily, showing a widespread vulnerability across calcifying organisms. Within 5-10 years, this could lead to widespread crop failures in shellfish farms, increased seafood prices, and significant job losses in coastal communities dependent on these industries. Picture the ocean as a giant fizzy drink; the more CO2 it absorbs, the more acidic it becomes, slowly dissolving the building blocks for shells. Fishermen, aquaculture businesses, and consumers of seafood will be most impacted and benefit from this understanding. What critical thresholds of ocean acidity will trigger irreversible collapse for entire marine food webs?

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