Multiple Choice
Which of the following is NOT a freshwater aquatic ecosystem?
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48. Ecology
Freshwater Aquatic Biomes
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Which of the following is NOT a freshwater aquatic ecosystem?
A
Lake
B
Estuary
C
River
D
Pond
Verified step by step guidance1
Step 1: Understand the definition of a freshwater aquatic ecosystem. These ecosystems are characterized by having low salt concentration, typically less than 1%, and include bodies of water such as lakes, rivers, and ponds.
Step 2: Identify the characteristics of each option: Lakes, rivers, and ponds are all freshwater ecosystems because they contain freshwater with low salinity.
Step 3: Examine the term 'Estuary.' An estuary is a coastal area where freshwater from rivers meets and mixes with saltwater from the ocean, resulting in brackish water with higher salinity than freshwater ecosystems.
Step 4: Compare the salinity levels and water types of estuaries versus freshwater ecosystems. Since estuaries have a mix of saltwater and freshwater, they are not classified as purely freshwater aquatic ecosystems.
Step 5: Conclude that among the options given, the estuary is NOT a freshwater aquatic ecosystem because it contains brackish water, unlike lakes, rivers, and ponds which are freshwater.
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