Multiple Choice
Which of the following statements is true of aquatic biomes?
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48. Ecology
Introduction to Aquatic Biomes
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Which of the following is a characteristic feature of oligotrophic lakes?
A
High nutrient levels
B
Abundant aquatic plants
C
High levels of organic matter
D
Clear water with low productivity
Verified step by step guidance1
Understand the term 'oligotrophic': Oligotrophic lakes are bodies of water that are characterized by low nutrient levels, particularly low in nitrogen and phosphorus, which limits the growth of algae and aquatic plants.
Consider the impact of low nutrient levels: Due to the scarcity of nutrients, oligotrophic lakes typically have clear water because there is less algal growth to cloud the water.
Evaluate the productivity: Low nutrient levels result in low primary productivity, meaning there is less organic matter being produced by photosynthetic organisms like algae and aquatic plants.
Contrast with eutrophic lakes: Eutrophic lakes, in contrast, have high nutrient levels, leading to abundant plant growth and higher levels of organic matter, often resulting in murkier water.
Identify the characteristic feature: Given the low nutrient levels and low productivity, the characteristic feature of oligotrophic lakes is clear water with low productivity.
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