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Clams Are Great Pollution Detectors By Susan Linville

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In the past, clams have been used to locate sources of pollution in bodies of water. They get their food, as well as performing gas exchange, through the process of filter feeding (Linville). This entails taking water inside of their shells and filtering it through their gills to trap food particles and exchange gas (Linville). When doing this, they bring in the food particles they need to survive and have the potential to bring in other materials such as toxic substances or pollutants (Linville). This also allows for the clams to clean the water, improving water quality (Stanford). When the clams bring in these substances, scientists are able to then analyze the tissue of the gills and find out which substances they brought in. This ability …show more content…

Asiatic clams are a freshwater species of clam originating in parts of Eastern Asia (NYIS). They are also indigenous in areas of Australia, Africa, and the Mediterranean (Seagrant). They are known to have one of the highest rates of filtration of any freshwater bivalve species, as well as high food consumption rates and growth (NYIS). It is explained in “Clams Are Great Pollution Detectors”, by Susan Linville, how “Biologists are putting Asiatic clams to work as pollution detectors in the Anacostia River Estuary east of Washington D.C to pinpoint where chemicals are getting into the waterway” (Linville). They have also been used in a study by the scientist Carol Reinisch (CBC). She is using clams for environmental monitoring of pollution in the Artic (CBC). Lastly, Asiatic clam were used as bio indicators for fecal pollution from the parasites Cryptosporidium and Giardia (Otter Project). In this case clams were used by exposing them to water and checking them for oocytes and fecal contamination (Otter Project). Since there have been previous cases where they have been used for dealing with pollution detection, it is a possibility that they can be used again for additional …show more content…

Air stripping removes contaminants by pumping contaminated water and evaporating the bad chemicals. However, it can take up to a year to have any effect on cleaning the water (Safewater). Activated carbon filtration bring pollutants through its system and collects them, but it needs to be changed frequently, have the possibility of taking a long time to work, and are very expensive (Safewater). Bioremediation is using microorganism to digest contaminants, but again has the possibility of taking a long time, yet is very inexpensive (Safewater). Phytoremediation involves using plants and trees to remove contaminants with their roots and is all natural, but it takes a very long time and the various plants or trees that are introduced can have negative effects on the ecosystems (Safewater). Wetlands and algae is similar to phytoremediation and is already used in wetland habitats for the same purpose of pollution removal. Lastly, chemical oxidation uses oxidants to change harmful chemicals into less harmful chemicals in a semi-timely manner, but it is expensive. Comparatively, Asiatic clams are easy to collect due to their prominence in many bodies of water from past human transport and easy to

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