An aquatic food web includes the following organisms.

Identify a primary producer
An aquatic food web includes the following organisms.

Identify a primary consumer
An aquatic food web includes the following organisms.

Identify a secondary consumer
Other than showing which organisms are consumed by others, describe what is indicated by the direction of the arrows in the diagram.
Identify the primary storage sink for nitrogen
Describe ONE critical step by which nitrogen is cycled through the biotic and abiotic components of Earth’s ecosystems.
Describe ONE more critical steps by which nitrogen is cycled through the biotic and abiotic components of Earth’s ecosystems.
Describe ONE way in which humans have disrupted the natural cycling of carbon
Identify ONE major environmental consequence of that disruption.
Explain ONE major way in which the phosphorus cycle differs from the nitrogen cycle.