NCERT Solutions for Class 12 Biology Chapter 14 - Ecosystem


NCERT Solutions for Class 12 Biology Chapter 14 – Ecosystem: An ecosystem is a structural and functional unit of nature and it comprises abiotic and biotic components. Abiotic components are inorganic materials- air, water and soil, whereas biotic components are producers, consumers, and decomposers. Each ecosystem has characteristic physical structure resulting from interaction amongst abiotic and biotic components. Species composition and stratification are the two main structural features of an ecosystem. Based on the source of nutrition every organism occupies a place in an ecosystem. NCERT Class 12 Biology Chapter 14 - Ecosystem is all about our ecosystem.

Four important components of an ecosystem are:

  1. Productivity
  2. Decomposition
  3. Energy Flow
  4. Nutrient Cycling

Primary productivity is the rate of capture of solar energy or biomass production of the producers. It is divided into two types:

  • Gross primary productivity (GPP)
  • Net primary productivity (NPP)

Nutrient cycling is of two types and these are:

  • Gaseous
  • Sedimentary

Rest of the important points you will get inside the Chapter 14 – Ecosystem of NCERT Class 12 Biology.

Here are the important topics of NCERT Class 12 Biology Chapter 14 – Ecosystem mentioned below:

14.1 Ecosystem–Structure and Function

14.2. Productivity

14.3 Decomposition

14.4 Energy Flow

14.5 Ecological Pyramids

14.6 Ecological Succession

    14.6.1 Succession of Plants

14.7 Nutrient Cycling

    14.7.1 Ecosystem – Carbon Cycle

    14.7.2 Ecosystem – Phosphorus Cycle

14.8 Ecosystem Services

In Chapter 14 – Ecosystem of Class 12th NCERT you will also study about different communities of an ecosystem. The biotic community is dynamic and undergoes changes with the passage of time. These changes are sequentially ordered and constitute ecological succession. Succession begins with the invasion of a bare lifeless area by pioneers which later pave way for successors and ultimately a stable climax community is formed. The climax community remains stable as long as the environment remains unchanged.

After going through the NCERT Class 12 Biology Chapter 14 – Ecosystem, you must be able to answer the questions mentioned below:

  • Q1. Define ecological pyramids and describe with examples, pyramids of number and biomass.
  • Q2. What is primary productivity? Give a brief description of the factors that affect primary productivity.
  • Q3. Define decomposition and describe the processes and products of decomposition.

If you have any problem in finding the answers to the above questions, then NCERT Solutions for Class 12 Biology Chapter 14 – Ecosystem, will help you out.

Also, try to do all the questions mentioned in chapter 14 - Ecosystem by yourself, because NCERT is the base of your studies and base should always be clear. If you have any doubt or unable to do by yourself then Solutions for NCERT Class 12 Biology Chapter 14 – Ecosystem will help you in a very good way, so that you can score good marks not only in 12th board exam as well as also in other competitive exams like NEET.

NCERT for Solutions Class 12 Biology Chapter 14 - Ecosystem: Solved Exercise Questions

NCERT Solutions class 12 – Biology

Chapter 1

Reproduction in organisms

Chapter 2

Sexual Reproduction in Flowering Plants

Chapter 3

Human Reproduction

Chapter 4

Reproductive Health

Chapter 5

Principles of Inheritance and Variation

Chapter 6

Molecular basis of inheritance

Chapter 7


Chapter 8

Human health and disease

Chapter 9

Strategies for enhancement in food production

Chapter 10

Microbes in Human Welfare

Chapter 11

Biotechnology: Principles and Processes

Chapter 12

Biotechnology and its applications

Chapter 13

Organisms and Populations

Chapter 15

Biodiversity and Conservation

Chapter 16

Environmental Issues


NCERT Solutions for Class 12- Subject wise

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