Review 3.1 - 3.2: Community interactions & feeding relationships

Front

What are decomposers?

Back

Decomposers are organisms that break down dead or decaying organic material, returning nutrients to the ecosystem.

Front

Define optimum photosynthesis rate.

Back

The optimum photosynthesis rate is the maximum rate of photosynthesis that occurs under ideal conditions before it levels off.

Front

Why is carbon dioxide important for photosynthesis?

Back

Carbon dioxide is a key reactant in the photosynthesis process, as it is used by plants to produce glucose and oxygen.

Front

What is a pyramid of biomass?

Back

A pyramid of biomass is a graphical representation showing the total mass of living matter at each trophic level in an ecosystem.

Front

Which trophic level typically has the least biomass?

Back

The top trophic level, usually consisting of apex predators, typically has the least biomass.

Front

What is an inversion of a pyramid of numbers?

Back

An inversion of a pyramid of numbers occurs when a higher trophic level has more individuals than a lower one, often due to parasitism or predation.

Front

What role do herbivores play in an ecosystem?

Back

Herbivores are primary consumers that feed on plants, transferring energy from producers to higher trophic levels.

Front

Explain the significance of light intensity in photosynthesis.

Back

Light intensity affects the rate of photosynthesis; higher light intensity generally increases the rate until a saturation point is reached.

Front

What is the role of phytoplankton in aquatic ecosystems?

Back

Phytoplankton are primary producers in aquatic ecosystems, converting sunlight into energy through photosynthesis.

Front

Define carnivores and their role in food webs.

Back

Carnivores are organisms that primarily eat other animals, playing a crucial role in controlling prey populations and energy transfer.