Zones in lake - Environment & Biodiversity

Q.  Which of the following is the correct arrangement of zones in a lake as per increasing depth of the zones?
- Published on 28 Aug 15

a. Littoral – Limnetic – Benthic - Profundal
b. Profundal– Littoral – Limnetic - Benthic
c. Littoral – Limnetic – Profundal - Benthic
d. Littoral – Profundal – Limnetic - Benthic

ANSWER: Littoral – Limnetic – Profundal - Benthic
 
Peripheral zone (littoral zone) with shallow water and most of the vegetation. Open water beyond the littoral zone is limnetic zone. It extends down as far as sunlight penetrates to permit photosynthesis. Profundal zone is where water is quite deep and it’s too dark for photosynthesis. Bentic zone (bottom) is the floor of the lake.

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