Why do photosynthetic protists play a critical role in aquatic ecosystems quizlet?

Why are protists ecologically important? 1) They play a key role in aquatic food chains- photosynthetic protists can “fix” carbon dioxide from the atmosphere into sugars or other organic molecules with high potential energy. … A long-term reservoir of carbon.

Why do photosynthetic protists play a critical role in aquatic ecosystems?

D) The diatoms’ photosynthetic output may over-oxygenate the water. 41) Why do photosynthetic protists play a critical role in aquatic ecosystems? A) Photosynthetic protists and prokaryotes are the major producers that form the critical base of food webs.

What is the key role of these protists in aquatic environments?

The protists will not only prey on the bacteria in the ocean, but will also absorb the carbon dioxide present in the water body, thus making the water even less harmful than before. Not only that it preys on bacteria and absorb carbon dioxide, the protists will also produce the oxygen in the ocean.

What crucial roles do protists play in ecosystems?

Protists function at several levels of the ecological food web: as primary producers, as direct food sources, and as decomposers. In addition, many protists are parasites of plants and animals that can cause deadly human diseases or destroy valuable crops.

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Why are protists an important part of ecosystems?

Protists produce almost one-half of the oxygen on the planet through . … Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis. Other protists decompose and recycle nutrients that humans need to live. All protists make up a huge part of the food chain.

What role do symbiotic protists and photosynthetic protists play in the ecosystem?

Photosynthetic protists serve as producers of nutrition for other organisms. Protists like zooxanthellae have a symbiotic relationship with coral reefs; the protists act as a food source for coral and the coral provides shelter and compounds for photosynthesis for the protists.

What is the importance of protists in the ocean?

Protists are essential sources of food and provide nutrition for many other organisms. In some cases, as with zooplankton, protists are consumed directly. Alternatively, photosynthetic protists serve as producers of nutrition for other organisms.

What do protists play important roles in?

Protists function in various ecological niches. Whereas some protist species are essential components of the food chain and generators of biomass, others function in the decomposition of organic materials. Still other protists are dangerous human pathogens or causative agents of devastating plant diseases.

Why is euglena photosynthetic?

Euglenas create their own food through photosynthesis, the process of absorbing sunlight to synthesize foods from carbon dioxide and water. An eyespot at the front end of the euglena detects light, and its chloroplasts (structures that contain chlorophyll) trap the sunlight, allowing photosynthesis to occur.

What are photosynthetic protists?

Photosynthetic protists are plant-like protists. They obtain their food and energy by sunlight and photosynthesis. They have chloroplasts. … Euglenoids have chloroplasts in them and perform photosynthesis. They are photosynthetic protists.

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What are the economic importance of protists?

Economic Importance of Protists

Protists serve as the foundation of the food chain. Protists are symbionts – having a close relationship between two species in which, one is benefited. Some protists also produce oxygen and may be used to produce biofuel. Protists are the primary sources of food for many animals.

How do protists decomposers service the ecosystem?

Protists as Decomposers. … Many of these organisms were also treated as fungi due to a similar environmental role: that of a decomposer. These fungus-like protist saprobes are specialized to absorb nutrients from nonliving organic matter, such as dead organisms or their wastes.

Which protist groups contain members that are photosynthetic?

Diatoms, present in both freshwater and marine plankton, are unicellular photosynthetic protists that are characterized by the presence of a cell wall composed of silicon dioxide that displays intricate patterns.