Ecosystem diversity refers to the variety of ecosystems within a specific area or across the planet. It includes different habitats, such as forests, wetlands, grasslands, and oceans, each supporting unique communities of plants, animals, and microorganisms. This diversity is crucial for maintaining ecological balance and resilience, allowing ecosystems to adapt to changes and disturbances. High ecosystem diversity contributes to overall biodiversity, which enhances ecosystem services like pollination, water purification, and climate regulation. Protecting diverse ecosystems, such as coral reefs and tropical rainforests, is essential for sustaining life on Earth and ensuring the health of our planet's environment.