What is the economic importance of
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the economic importance of protozoans?
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Since some types of protozoans (namely plankton) are "considered by some to be the most
important organisms on Earth"*, the economic importance, while maybe difficult to measure,
would seem to be quite large.
Protozoans are unicellular microbes whose cells have membrane-bound nuclei.
In the 21st century, the tendency has been to classify algae outside the class of protozoans. This
then would preclude kelp (a type of brown algae) from the class of protozoans. Another possible,
widely-used, microorganism that might be confused with protozoa are diatoms--diatomaceous
earth, for example, is a valued product (and therefore of great economic importance) made from
diatoms.
Unicellular aquatic Protista (plankton) form a very important component of the food chain. The
photosynthetic ones are called phytoplankton and the heterotrophic ones are called zooplankton
(which also includes many animal larvae or tiny crustaceans). The planktons are credited with
supporting the lower end of the ocean food chains. They are therefore considered by some to be
the most important organisms on Earth.
(General info on protozoa:
Most protozoa are too small to be seen with the naked eye-most are around 10-50 μm, but forms
up to 0.5 mm exist-but can easily be found under a microscope. Protozoa are ubiquitous
throughout aqueous environments and the soil, and play an important role in their ecology.
Protozoa occupy a range of trophic levels. As predators upon unicellular or filamentous algae,
bacteria, and microfungi, protozoa play a role both as herbivores and as consumers in the
decomposer link of the food chain. Protozoa also play a vital role in controlling bacteria
population and biomass. As components of the micro- and meiofauna, protozoa are an important
food source for microinvertebrates. Thus, the ecological role of protozoa in the transfer of
bacterial and algal production to successive trophic levels is important. Protozoa such as the
malaria parasites, trypanosomes and leishmania are also important as parasites and symbionts of
multicellular animals.)
sources:
arnica.csustan.edu/boty1050/Protista/protista.htm
http://en.wikipedia.org/wiki/Plankton
http://en.wikipedia.org/wiki/Protozoa
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economic importance of protozoa?
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Protozoans are the main cause of malaria but they also help purify water by feeding on organic
waste substances in polluted water.
Marine protozoans like Amoeba proteus are very important food for larval fishes, including the
commercially harvested atlantic cod, whose freshly hatched young require soft protozoans such
as amoebas for their first week or two of feeding, as their jaws haven't formed fully and they
can't bite hard foods.
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