Multiple Choice
Which of the following is a characteristic of oligotrophic lakes?
48. Ecology
Freshwater Aquatic Biomes
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Which of the following are characteristics of freshwater ecosystems?
A
Presence of coral reefs
B
Low salinity levels
C
Dominance of salt-tolerant species
D
High salinity levels
Verified step by step guidance1
Begin by understanding the concept of freshwater ecosystems. These are aquatic systems where the water has low concentrations of dissolved salts, typically less than 1% salinity.
Recognize that coral reefs are typically found in marine environments, which have high salinity levels, not in freshwater ecosystems.
Identify that freshwater ecosystems are characterized by low salinity levels, which is a key distinguishing feature from marine ecosystems.
Understand that salt-tolerant species are usually found in environments with higher salinity, such as marine or brackish water ecosystems, not in freshwater ecosystems.
Conclude that high salinity levels are not a characteristic of freshwater ecosystems, as they are defined by their low salinity.
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