The Journey of Energy from Sunlight to Food in Ecosystems

The video explores how energy from the sun is converted into food through photosynthesis, focusing on net primary productivity (NPP). It explains the role of producers in capturing sunlight to create biomass, which is then transferred through food chains. The video also compares NPP across various biomes, highlighting the differences in biodiversity and productivity. Finally, it emphasizes the sun's role in providing energy for all life on Earth.

What is the ultimate source of energy for all food on Earth?

• The Ocean

• The Sun

• The Moon

• The Earth's Core

What process do plants use to convert sunlight into biomass?

• Respiration

• Photosynthesis

• Fermentation

• Digestion

What does GPP stand for in the context of energy capture by producers?

• Global Photosynthesis Process

• Green Plant Productivity

• General Plant Production

• Gross Primary Productivity

Which biome is known for having the highest net primary productivity?

• Deserts

• Rainforests

• Tundra

• Grasslands

Why do deserts have low net primary productivity?

• High biodiversity

• Low nutrient concentration

• Abundant plant cover

• High rainfall

Which marine environment supports a high level of biodiversity due to high NPP?

• Polar Waters

• Deep Sea

• Coral Reefs

• Open Ocean

What role do zooxanthellae play in coral reefs?

• They provide structural support

• They perform photosynthesis

• They are predators

• They clean the water

Why is the open ocean considered to have low NPP?

• Too shallow for sunlight

• Too deep for sunlight

• Too salty for plant growth

• Too warm for photosynthesis

What is a key factor that affects NPP in wetlands and estuaries?

• Mix of nutrients

• High altitude

• Cold temperatures

• Lack of water

Why do lakes and rivers generally have low NPP?

• Stable ecosystems

• Fast water flow

• Abundant plant life

• High nutrient levels