Aquatic Ecosystems Exam

Front

What are aquatic ecosystems?

Back

Aquatic ecosystems are ecosystems located in water environments, including freshwater (like rivers and lakes) and marine (like oceans and seas) ecosystems.

Front

What is the significance of headwaters in a river?

Back

Headwaters are the source of a river, typically found in mountainous areas, and are crucial for the river's flow and ecosystem.

Front

What are emergent plants?

Back

Emergent plants are those that grow above the water surface in aquatic environments, often found in shallow areas of ponds and lakes.

Front

What is 'marine snow'?

Back

Marine snow refers to the continuous shower of organic material falling from the upper layers of the water column to the deep sea, serving as food for deep-sea organisms.

Front

What is the abyssal plain?

Back

The abyssal plain is a flat, deep-sea floor area that is characterized by a lack of light and photosynthesis, relying on organic matter from above.

Front

Define benthos.

Back

Benthos are organisms that live on or in the bottom sediments of aquatic environments, such as clams and worms.

Front

What are nekton?

Back

Nekton are aquatic animals that can swim freely and are capable of moving against currents, such as fish and whales.

Front

What is plankton?

Back

Plankton are small organisms that drift in water currents, including phytoplankton (plant-like) and zooplankton (animal-like).

Front

How do photosynthesis and respiration differ in aquatic ecosystems?

Back

Photosynthesis occurs in the presence of sunlight, allowing plants to produce oxygen, while respiration is the process by which organisms consume oxygen and release carbon dioxide.

Front

What role do decomposers play in aquatic ecosystems?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem, which is essential for maintaining ecological balance.