Did a clam just excrete some brown atom in your paw ? The ripe news program is that it might not be poop . The bad news is that it might be worse than crap . The best news is that hooey that ’s “ bad than poop ” can save up an ecosystem .

Clams , tube louse , and other mollusks are filter feeders , which means that anything that floats close enough to them gets sucked into their oral cavity . Given the Department of State of the ocean , there are a wad of horrible thing floating by them .

fortuitously for them , this is not a new phenomenon . Clams live in gumption . If they did n’t have a way of filtering out the diminutive particles they took in , they would basically sand their inside down to nothing . They have long been dealing with their indiscriminate eating habit by producing something love as “ pseudofeces , ” or , in laypeople ’s terms , false crap .

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A mollusk ’s mouth is a great slew more nimble than our own . or else of a large unwieldy tongue , it has many petite tentacle - like hairs called cilia . When a dollar draw in water to the equivalent of its sassing ( and often the water passes through its gill first ) , the cilia essentially sort the little atom . The plankton and other tasty food they post down particular groove to the digestive tract . The art object of backbone or other non - nutritionary inwardness they wrap in mucous secretion and cast out into the drape , the main caries of the clam . Eventually these packages of mucus make its way of life to the same spot the regular feces goes , and all of it gets excreted when the clam clacks its shells together .

This might just be trivia if it did n’t have a surprising environmental impact . Run - off from farms and other human colony hold food ( like fertilizers and constitutional fabric ) as well as useless bits of grit and dirt . These things can cloud the waters and encourage blooms of alga . Humans have a knotty sentence sorting the organic and inorganic matter , but mollusc do not . Throw in a few clams into water that ’s sound with run - off and the nutrient get filtered out . The particulate matter gets box up and deposited on the ground , where it will settle beneath the airfoil deposit and stay out of the way . ( Remember , the mollusc have an interest in not having to re - filter the stuff they ’ve already sort through . It ’s a waste of DOE . Plus , I like to retrieve that even mollusc have some horse sense of disgust . )

While loot and oysters digest the organic particles humans throw off in the ocean , their pseudofeces fundamentally buries whatever else we throw at them . Between the imitation poop and the real nincompoop , they can clean our water system for us .

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[ Sources : impact of Pseudofeces in the Benthos , Principles of Pseudofeces Rejection . ]

Top trope : Dann Blackwood , USGS , Second Image : USEPA Environmental - Protection - Agency .

BiologyScience

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