Study MaterialsNCERT SolutionsNCERT Solutions For Class 12 BiologyNCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.2 Productivity

NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.2 Productivity

NCERT Solutions for Class 12 Biology Chapter 14 Topic- Productivity

NCERT Solutions for Class 12 Biology Chapter 14 Topic- Productivity and all chapter Topics produced by qualified teachers according to NCERT (CBSE) book rules are available as a free PDF download. Class 12 Biology Chapter 14 Topic- Productivity Questions with Solutions to assist you in revising the entire syllabus and achieving higher grades.

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    Overview of Topic

    In ecology, productivity means how fast plants make new stuff. This stuff is important for life and energy in the ecosystem. There are two main types of productivity:

    1. Primary Productivity: This is when plants make new stuff from sunlight, water, and air.
    2. Secondary Productivity: This is when animals use the stuff made by plants to grow and survive.

    Primary Productivity

    Primary productivity is about how much living material, like plants, is made from non-living stuff through processes like photosynthesis. Photosynthesis is the main way this happens, turning things like carbon dioxide and water into organic material. There are two main parts to primary productivity:

    1. Gross primary productivity: This is the total amount of organic material made by plants through photosynthesis. It depends on how much sunlight there is and other factors.
    2. Net primary productivity: This is what’s left over after plants use some of the energy they make for themselves. It’s what animals can eat. We calculate it by subtracting what plants use from what they make.

    So, net primary productivity is like the energy left over for other living things after plants have used some for themselves. Every year, there’s a huge amount of net primary productivity happening worldwide, which is basically plants making food for the rest of the ecosystem.

    Secondary Productivity

    Animals and other creatures that can’t make their own food affect how much energy is passed on from one living thing to another. This energy keeps flowing between different organisms, which is different from when plants make their own food. This happens when organic stuff moves between different levels of a food chain. It’s also called how fast the mass of these creatures grows. Animals, fungi, bacteria, and many other tiny living things influence this process.

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    FAQs on NCERT Solutions for Class 12 Biology Chapter 14 Ecosystem 14.2 Productivity

    What do you mean by productivity in an ecosystem?

    Productivity is how fast plants and animals grow in an area. It's measured by how much weight they gain over a certain area.

    What is the primary source of energy in an ecosystem?

    The sun provides most of the energy in an ecosystem. Plants, cyanobacteria, and algae use sunlight to make their own food. This starts the flow of energy through the food chain.

    When are all the ecosystems equally productive?

    During droughts, every ecosystem works just as well. Studies show that in droughts, tropical forests can use water as effectively as deserts do.

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