AP BIOLOGY

Detailed explanation-1: -In aquatic ecosystems fish are often the organisms at the top of the food chain. They are often the secondary and tertiary consumers. The producers in an aquatic ecosystem are algae and aquatic plants. These producers are consumed by the primary consumers, which are often small fish and aquatic macroinvertebrates.

Detailed explanation-2: -There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need.

Detailed explanation-3: -Examples of primary consumers are zooplankton, butterflies, rabbits, giraffes, pandas and elephants. Primary consumers are herbivores. Their food source is the first trophic level of organisms within the food web, or plants. Plants are also referred to as autotrophs.

Detailed explanation-4: -Caterpillars, insects, grasshoppers, termites and hummingbirds are all examples of primary consumers because they only eat autotrophs (plants). There are certain primary consumers that are called specialists because they only eat one type of producers.