Arrange the following ecosystems in the increasing order of their mean net primary productivity 1 Es...........

Geography World climates

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Arrange the following ecosystems in the increasing order of their mean net primary productivity.

1. Estuaries

2. Desert scrub

3. Open ocean

4. Alpine ecosystem

Select the correct code given below.

3-2-4-1

2-3-4-1

2-4-3-1

2-3-1-4

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Explanation:

Net primary production represents the amount of usable energy at trophic level one, which is available to higher trophic levels.

Net Primary Productivity of various ecosystems include:
1. Extreme desert, rock and ice - 3 dry grams/m2/year
2. Desert scrub - 70 dry grams/ m2/year
3. Open Ocean - 125 dry grams/ m2/year
4. Tundra and Alpine - 140 dry grams/ m2/year
5. Tropical rain forests, swamps, marshes and estuaries - 2000 dry grams/ m2/year
Whole earth - 320 dry grams/ m2/year.