What Is the Importance of a Primary Consumer?

Zebras are pirmary consumers on the African savannah.

Primary consumers provide an important link between primary producers and carnivorous secondary consumers. The energy and nutrients stored in plant tissues are generally unusable to secondary consumers, since they lack the digestive processes needed to break this material down.

Food Web

The food web traces the flow of energy and nutrients between organisms in an ecosystem. Organisms occupying higher trophic levels consume the organisms of lower levels to gain their needed energy and nutrients.

Primary Producers

The base of food webs is occupied by primary producers, such as plants, algae and some bacteria. These organisms capture energy and inorganic nutrients to create the organic molecules needed for life.

Primary Consumers

The energy and nutrients stored in the cells of primary producers are largely unusable to carnivores. Herbivorous animals play a critical role in converting the nutrients into digestible forms for secondary consumers.

Secondary Consumers

Secondary consumers, such as carnivorous animals, obtain their needed energy and nutrients from eating primary consumers.

Energy and Nutrient Flow

Nutrients are cycled between the organisms and environment of the ecosystem. However, energy is continually lost in the ecosystem. A constant supply of energy must be put into the ecosystem.

References

• Food Chains and Food Webs
• Ecosystems
• Marine Food Webs