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[THEMATIC REPORT] How Shellfish counter Water Pollution

by Vyomm Khanna | 01-04-2022 00:49



Mussels are one of the most popular seafood delicacies globally, but these little critters may also serve a more ecologically friendly function. Mussels breathe by pumping and filtering water and ingesting phytoplankton, which they graze on. At the same time, they absorb contaminants like phosphates, nitrates, and microplastics from the water.

It's an example of the unique phenomena of mussels acting as a continuous natural filter. Oysters can filter around 200 liters of water every day. Microplastics, pesticides, and other contaminants are absorbed by the humble mussel, which works as a vacuum cleaner for the sea. Nature has fought back where man has caused difficulties by polluting the environment.

On the other hand, Clams may filter up to 20 liters of water each day, enabling more sunshine to reach the seagrasses and raising oxygen levels. Mussels are are like canaries in a coal mine, their health serving as a barometer for water quality.


Stanford University researchers demonstrated the cleaning qualities of the bacteria by introducing California floater mussels and Asian clams into a tank with wastewater. Around 80% of the pollutants in the water had vanished after three days.

While the water they take in passes through their gills, practically everything else collects. As a result, they efficiently serve as both water monitors and filters, eliminating dangerous pollutants, functioning as a gauge for pollution levels in their neighborhood, and purifying the water simultaneously.



Fertilizers like phosphate and nitrates help enhance agriculture yields but can harm marine ecosystems, the most prevalent pollutants taken up by mussels. They are harmful because they foster the establishment of algal blooms, which deplete oxygen in the water and block out sunlight, making it difficult for other species to survive. Thankfully, mussels eat the algae, reversing the eutrophication process. E. coli bacteria and microplastics, particularly bisphenol A and phthalates, are other contaminants that mussels remove from the water.


According to Diane Murphy, a Cape Cod Extension fisheries and aquaculture specialist, oysters and quahogs utilized for cleaning from permitted waters are still acceptable to consume.

 

"Think about it in your garden," she said. "You wouldn't hesitate to eat Swiss chard or tomatoes from your garden, yet they've absorbed nitrogen from the soil to aid their growth." The same is true for oysters and other living beings."

"Using shellfish provides a low-cost option for nitrogen removal, but it also provides economic advantages to clam producers and restaurants in the form of employment and money," Charette added.

However, the researchers emphasize that shellfish farming is only one component of a long-term strategy for decreasing nitrogen levels in rivers.

"Aquaculture is something that can start reducing those nitrogen loads right away," Murphy said, "but it can't do everything." "To expect anything less would be a disrespect to the shellfish."

However, the researchers emphasize that shellfish farming should be viewed as only one component of a long-term strategy for decreasing nitrogen levels in rivers.

 

"Aquaculture is something that can start reducing those nitrogen loads right away," Murphy said, "but it can't do everything." "Expecting the shellfish to shoulder the entire cleaning burden would be a disservice."

 

However, the battle against marine contamination is deteriorating. The world's seas are in peril, and shellfish are also in danger. Oyster reefs have declined in quantity, making them one of the world's most vulnerable marine environments.

One of the most significant issues is that rising carbon emissions have resulted in more carbon dioxide in the environment. This acidic gas then dissolves in the seas, raising the acidity of the water and making shellfish production more difficult. Researchers investigating the cause of a decline in the number of scallops, clams, and oysters on the east coast determined that the warming climate, not overfishing, was to blame for reducing populations.

 

As citizens of the earth, we must ensure that marine wildlife thrives, as it is a significant factor in preserving the biodiversity and ecological stability of the globe. I hope this article has taught you something new!