2007-03-15 13:34:14 · 4 answers · asked by rose 1 in Science & Mathematics ➔ Biology
they are recyclers. they recycle nitrogen and they contribute to plants
2007-03-16 15:33:01 · answer #1 · answered by wesnaw1 5 · 0⤊ 0⤋
Being aquatic,Photosynthesizers give off oxygen and function as producers in both freshwater and saltwater ecosystems. Protists enter symbiotic relationships ranging form parasitism to mutualism. For example, coral reef formation is greatly aided by the presence of a symbiotic photosynthetic protist that lives in the tissues of coral animals.
Red algae are economically important. Agar is a gelatin-like product made from one algae, that is used for making capsules for vitamins and drugs, is used in food preparation, and is an agent for producing chocolate and cosmetics.
The algin in brown algae is used for making ice cream, sherbert, cream chesse, and other products for a smooth consistency.
Diatoms are significant producers of food and oxygen in aquatic ecosystems because of their abudance. It used as a gentle polishing abrasive in tootthpaste.
Water molds are filamentous decomposers of organic remains.
2007-03-15 21:35:56 · answer #2 · answered by lordoftherings1217 4 · 0⤊ 0⤋
Phytoplankton
Produce around 70-80% of Earth’s Oxygen
Major food source for aquatic animals
Protozoans
Major bacterial predator
Decomposers of dead material
Return needed chemicals
2007-03-15 20:38:27 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Many of the protists are algae. Algae start food chains and produce oxygen as a result of photosynthesis.
2007-03-15 20:36:50 · answer #4 · answered by ecolink 7 · 0⤊ 0⤋