Ecosystem Dynamics and Succession Concepts

The video explores ecosystems, their structure, and functions, including energy flow, nutrient cycling, and decomposition. It discusses ecological pyramids, succession, and the importance of biomass and productivity. The video also covers nutrient cycles like carbon and phosphorus, highlighting ecosystem services and the need for conservation.

What are the two main components of an ecosystem?

• Water and Soil

• Biotic and Abiotic

• Producers and Consumers

• Plants and Animals

Which of the following is an example of an artificial ecosystem?

• Forest

• Aquarium

• Desert

• Ocean

In a pond ecosystem, what role do decomposers play?

• They provide shelter for fish.

• They consume small fish.

• They produce energy from sunlight.

• They break down dead matter.

What is primary productivity?

• The total biomass produced by consumers.

• The energy stored in the form of glucose by plants.

• The number of herbivores in an ecosystem.

• The amount of energy lost as heat.

Which type of ecological pyramid is always upright?

• Pyramid of Producers

• Pyramid of Numbers

• Pyramid of Biomass

• Pyramid of Energy

What is ecological succession?

• The interaction between predators and prey.

• The process of energy flow in an ecosystem.

• The gradual change in species composition in an area.

• The cycle of nutrients in the soil.

Which of the following is a pioneer species in primary succession?

• Grasses

• Trees

• Lichens

• Shrubs

What is the main reservoir of phosphorus in the phosphorus cycle?

• Soil

• Rocks

• Oceans

• Atmosphere

Which nutrient cycle is primarily gaseous?

• Carbon Cycle

• Calcium Cycle

• Iron Cycle

• Phosphorus Cycle

What is the estimated annual value of ecosystem services globally?

• 33 trillion US dollars

• 50 trillion US dollars

• 10 trillion US dollars

• 20 trillion US dollars