Question

Which of the following statements are correct?
(i) Deserts and deep lakes show least productivity.
(ii) 10g by mass is passed to the next trophic level in the food chain.
(iii) Most productive ecosystem is coral reef.
(iv) Sugarcane is the most productive crop.
Choose the correct option.
A. (i) and (iv)
B. (i) and (iii)
C. (ii) and (iii)
D. (i), (iii) and (iv)

Answer 1

Hint: Productivity in ecology refers to the pace at which energy is contributed to organisms' bodies as biomass. Productivity of a place is affected by many factors such as solar energy input, temperature and moisture levels, carbon dioxide levels, availability of nutrients, and community interaction.


Complete step by step answer:
Simply said, biomass is the quantity of material held in a set of organisms' bodies. The amount of organic material that accumulates over time, or its equivalent in dry matter, carbon, or energy content. There are two types of productivity in ecosystems: primary and secondary. Green plants capture solar energy and store it as chemical energy in organic forms. The pace at which energy builds up in green plants or producers—the first and most fundamental kind of energy storage—is referred to as primary productivity.

The most productive terrestrial ecosystems are tropical rainforests. The least productive ecosystems are those found in deserts, tundra, and deep oceans, which typically fix less than 0.5 103 kilocalories per square meter per year. Productivity gauges how effectively a company's production system operates. It is computed by dividing a company's outputs by the inputs it used to achieve those outputs.

So, option (D) is correct.



Note:
The productivity of an ecosystem is the rate at which biomass is produced in that ecosystem over a specified period of time. Deserts and large bodies of water have the least productive ecosystems. Coral reef ecosystems are the most productive because of their structural complexity. Tropical rain forests are another name for it. Tropical and temperate woodlands are included. Agroecosystem refers to an ecosystem found on agricultural land. The most fruitful agroecosystem is sugarcane.