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Phylum Mollusca Essay

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Bivalvia is belonging to phylum Mollusca. The phylum Mollusca is one of the largest most diverse in the animal kingdom (Gosling, 2003). Almost 50000 described species in this phylum are recorded and about 30000 are found live in the marine habitat. Organism classes in phylum Mollusca mostly are soft-bodied animals but most are protected by a hard protective shell. Besides that, animals in this phylum possess a large muscular foot that usually used for the locomotion. Phylum Mollusca consists of six major classes which are Gastropoda, Monoplacophora, Polyplacophora, Cephalopoda, Bivalvia and Scaphopoda.
Class Bivalvia consists about 15,000 species included clams, oysters, mussels and scallops (Morton, 2013). Basically, class Bivalvia also known …show more content…

When organisms are response to this interaction, it will influence its distribution and abundances in both on a local and regional scale. Basically, despite that, there is other factors that affecting the distribution of bivalves. The factors are including physical and biological factors. The physical factor is temperature and salinity where most marine bivalves live within a temperature range from -3°C to 44°C and involves other factor such as substrate where most bivalves show a preference for a particular substrate. Biological factors are including predators, pests and also …show more content…

Filter feeders usually consume phytoplankton and other materials suspended in the water column, digesting part of the organic material and egesting the remainder as biodeposits. There are a lot of benefits of filter feeder towards environment. According to Konrad (2013), one the benefit of filter feeders is they play important role on reducing hypoxia in estuaries depends on a reduction in the flux of organic detritus to benthic sediments that creates biochemical oxygen demand (BOD) through heterotrophic respiration and decomposition of organic

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