Introduction to Ecosystems and their Classification

The video explains ecosystems, highlighting the interaction between living and non-living components. It introduces the concept of ecosystems, coined by AG Tansley in 1953, and classifies them into terrestrial and aquatic types. Terrestrial ecosystems include forests, grasslands, deserts, and tundras, each with unique characteristics. Aquatic ecosystems are divided into marine and freshwater, based on salt concentration. The session concludes with a summary and a preview of the next topic: ecosystem structure.

Who coined the term 'ecosystem' and in which year?

• Rachel Carson, 1962

• James Lovelock, 1979

• AG Tansley, 1953

• Charles Darwin, 1859

Which type of ecosystem is characterized by the dominance of grass and the absence of trees?

• Forest

• Desert

• Tundra

• Grassland

What is a key characteristic of desert ecosystems?

• High rainfall

• Abundant water bodies

• Dense forests

• Scanty rainfall and barren lands

Which ecosystem is known for having a high salt concentration?

• Freshwater ecosystem

• Marine ecosystem

• Grassland ecosystem

• Tundra ecosystem

What type of water bodies are included in freshwater ecosystems?

• Rivers, ponds, lakes, streams

• Forests and grasslands

• Deserts and tundras

• Seas and oceans