260235
Which one of the following ecosystem has the highest annual net primary productivity?
1 Tropical deciduous forest
2 Temperature evergreen forest
3 Desert
4 Tropical rain forest
Explanation:
The productivity is found high in the tropical rain-forest's in those areas where favorable conditions like optimum light intensity, rainfall etc are present. It is productive throughout the year and has an annual net primary productivity of $9000 \mathrm{kcal}$ per square meter per year.