Limpid water containing organic debris or silt alongside negligible biological activity is designated__________________?
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Answer: A. Oligotrophic
Explanation
Oligotrophic water bodies are characterized by low nutrient levels, clear water, and minimal biological productivity. These aquatic ecosystems feature deep penetration of sunlight and high dissolved oxygen concentrations throughout. Consequently, they support sparse populations of phytoplankton and specialized aquatic fauna. Limnology classifies water bodies based on nutrient status into oligotrophic, mesotrophic, and eutrophic categories. Oligotrophic lakes typically form in cold, undisturbed mountainous regions with rocky basins.
Conserving oligotrophic water resources is vital for maintaining pristine drinking water reservoirs and recreational sites. These fragile ecosystems are highly sensitive to human nutrient runoff and pollution. Option B, mesotrophic, describes lakes with moderate nutrient levels and biological productivity. Option C, eutrophic, indicates nutrient-rich waters prone to dense algal blooms and oxygen depletion. Option D is a non-standard scientific term.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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