Biodiversity and Its Importance — Reading Comprehension

Biodiversity describes the variety of life found on Earth. Scientists study biodiversity to understand how ecosystems remain balanced and how living things interact. When an ecosystem has high biodiversity, it can recover more quickly from changes, such as storms or disease outbreaks. Biodiversity operates at three main levels: genetic diversity, species diversity, and ecosystem diversity. Each level plays a unique role in the health and stability of the planet.

Three Levels of Biodiversity
Genetic diversity refers to the differences in DNA among individuals within a species. This diversity allows populations to adapt to changes, like new diseases or temperature shifts. Species diversity is the number and variety of species in a region or ecosystem. For example, a tropical rainforest may contain over 400 tree species in a single hectare. Ecosystem diversity means the variety of habitats, such as forests, wetlands, and coral reefs. Each ecosystem supports different communities of organisms and provides essential services like clean water and air.

Why Biodiversity Matters
Biodiversity is vital for ecosystem stability. Diverse ecosystems are more resilient and able to maintain balance even when faced with pressures like drought or invasive species. Biodiversity also supports food security, since many different crops and animals contribute to our diets. Over 50% of modern medicines are derived from plants, animals, or microorganisms, making biodiversity a source for new treatments. Economically, biodiversity boosts industries like tourism and fisheries. Many cultures also value the beauty and inspiration found in nature, which is called aesthetic value.

Biodiversity Hotspots and Threats
Some regions, called hotspots, have especially high biodiversity. Examples include tropical rainforests and coral reefs, which together hold more than half of all known species. However, biodiversity is under threat. Habitat destruction, often caused by deforestation or urban growth, removes homes for plants and animals. Climate change, pollution, invasive species, and overexploitation also reduce biodiversity. For instance, scientists estimate that species are going extinct at rates 100 to 1,000 times higher than natural background rates due to human activities.

Conservation and Our Role
Conservation strategies help protect biodiversity. These include creating protected areas, restoring damaged habitats, and breeding endangered species in captivity. Governments, scientists, and local communities all work together to save biodiversity. Students can help by learning about local species, reducing waste, planting native plants, and supporting conservation organizations. Every action, big or small, contributes to maintaining the balance of life on Earth.

Interesting Fact:
The Amazon rainforest, a biodiversity hotspot, is home to about 10% of all known species on Earth.

What are the three main levels of biodiversity described in the passage?

Why is genetic diversity important for a species?

Which of the following is an example of a biodiversity hotspot?

According to the passage, what is one direct benefit of biodiversity to humans?

What does the term 'ecosystem stability' mean as used in the passage?

What is the meaning of the word 'hotspots' as used in the passage?

How does biodiversity support food security?

If habitat destruction continues, what could be a likely effect?

True or False: Biodiversity only matters to animals, not to humans.

True or False: Students can help protect biodiversity by supporting conservation organizations.