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Importance of Biodiversity: Utilitarian, Ecosystem Service and Ethical Values

The importance of biodiversity refers to the direct, indirect and ethical reasons for protecting biological variety, including useful products, ecosystem services and the responsibility to allow other species to exist.

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Student-friendly explanation

Biodiversity supports human life and ecosystem stability in several ways. Narrowly utilitarian value includes direct benefits such as food, medicines, fibres, timber and industrial materials obtained from organisms. Broadly utilitarian value includes ecosystem services such as pollination, oxygen production, climate regulation, soil formation, nutrient cycling and water purification. Ethical value means species should be protected not only for human use but also because every organism has a role and a right to continue in nature. Exam answers should classify the reason correctly and add examples instead of writing a general statement that nature is useful.

How to write this in exams

  1. 1

    Start with the exact idea

    The importance of biodiversity refers to the direct, indirect and ethical reasons for protecting biological variety, including useful products, ecosystem services and the responsibility to allow other species to exist.

  2. 2

    Then show how to use it

    Read the example carefully. If humans directly use a product from an organism, classify it as narrowly utilitarian. If the benefit comes from ecosystem functioning, classify it as broadly utilitarian. If the question asks why species should be protected even without known use, write ethical value.

  3. 3

    Add one concrete example

    Honeybees and other pollinators support crop production. Forests help regulate climate and water cycles. Medicinal plants are examples of direct biological resources used by humans.

  4. 4

    Avoid this incomplete answer

    Writing that pollination by insects is narrowly utilitarian is wrong because pollination is an ecosystem service supporting reproduction and food production.

Definition

The importance of biodiversity refers to the direct, indirect and ethical reasons for protecting biological variety, including useful products, ecosystem services and the responsibility to allow other species to exist.

Example

Honeybees and other pollinators support crop production. Forests help regulate climate and water cycles. Medicinal plants are examples of direct biological resources used by humans.

Rule to remember

Key rule: direct products are narrowly utilitarian; ecosystem services are broadly utilitarian; moral responsibility towards other species is ethical value.

Memory hook

Products, services and responsibility: these are the three reasons.

Examples and method

Worked example

If a question asks whether oxygen release by green plants is narrowly or broadly utilitarian, classify it as broadly utilitarian because it is an ecosystem-level service, not a harvested product.

Method to apply

Read the example carefully. If humans directly use a product from an organism, classify it as narrowly utilitarian. If the benefit comes from ecosystem functioning, classify it as broadly utilitarian. If the question asks why species should be protected even without known use, write ethical value.

Diagram support

A value-map can show biodiversity at the centre with three branches: direct products, ecosystem services and ethical reasons. Labels should include food, medicine, pollination, nutrient cycling and species existence.

How CBSE asks it

Often asked as a three-part short answer, assertion-reason on ecosystem services, or example classification between direct use and indirect ecological service.

Avoid common mistakes

Common confusion

Students mix narrowly utilitarian and broadly utilitarian values. Direct products like medicines are narrowly utilitarian, while pollination and climate regulation are ecosystem services.

Common wrong answer

Writing that pollination by insects is narrowly utilitarian is wrong because pollination is an ecosystem service supporting reproduction and food production.

Exam tip

Use three headings in answers: narrowly utilitarian, broadly utilitarian and ethical. Add one specific example under each heading.

Quick check

How is broadly utilitarian value different from narrowly utilitarian value of biodiversity?

Broadly utilitarian value refers to ecosystem services such as pollination and climate regulation, while narrowly utilitarian value refers to direct products such as food, medicines and timber obtained from organisms.

Answer writing and exam use

1-mark answer

Begin with a one-line statement that biodiversity supports life and ecosystem stability, then write the three values with one correct example each and a final sentence linking biodiversity to ecological balance.

2-mark answer

Begin with a one-line statement that biodiversity supports life and ecosystem stability, then write the three values with one correct example each and a final sentence linking biodiversity to ecological balance.

3-mark answer

Begin with a one-line statement that biodiversity supports life and ecosystem stability, then write the three values with one correct example each and a final sentence linking biodiversity to ecological balance.
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