Question

__________ is the rate of production of organic matter by consumers.
A. Primary Productivity
B. Secondary Productivity
C. Net Primary Productivity
D. Gross Primary Productivity

Answer 1

Hint:
Gross productivity is the total rate of energy capture, while productivity is the rate at which energy is contributed to the bodies of a group of creatures, such as primary producers, in the form of biomass. The quantity of energy contained in biomass is reflected in the net productivity. Gross productivity adjusts the amount of energy that organisms consume for respiration and metabolism.

Complete step by step answer:
The producers in an ecosystem are those that grow their own food. Food for the entire environment is also produced by the producers. The producers are the only source of food for all the animals in the ecosystem.
Productivity in ecology refers to how quickly biomass is produced within an ecosystem. The common unit of measurement is mass per volume per unit of time. The mass may be made up of dry matter or carbon that has been produced.
Primary productivity refers to the output of autotrophs like plants. Secondary productivity refers to the output of heterotrophs like animals. The creation of new organic material from inorganic molecules like water and carbon dioxide is referred to as primary productivity. It is a result of photosynthesis, a process that turns sunlight into organic compounds like sugars.
The production of biomass by heterotrophic organisms in a system is known as secondary productivity. The movement of biological matter between trophic levels is what propels it. It also shows the volume of new tissue produced as a result of meal absorption. The only consumption of primary producers by herbivorous consumers is sometimes included in the definition of secondary production.
Animals, protists, fungi, and many bacteria are among the organisms that contribute to secondary productivity.
Numerous techniques, such as the Allen curve approach, increment summation, and removal summation, can be used to calculate secondary productivity. The environment being studied and the assumptions made by each method influence which approach should be used. For instance, whether linear mortality may be assumed, whether cohorts should be distinguished, and whether exponential population growth is appropriate.
Hence, the correct option is Secondary Productivity

Option ‘B’ is correct

Note:
The mass of biologically active organisms in an environment at any particular time is known as its biomass. The mass of one or more species is referred to as species biomass, and the mass of all species within a certain community is referred to as community biomass. Microorganisms, plants, and animals can all be a part of it. It can be stated as either the overall mass of the community or as the average mass per unit area.