ES Ch 7 Review

Front

How are coral reefs formed?

Back

Coral reefs are formed by the secretion of calcium carbonate by tiny marine animals called corals.

Front

Which of the following is not considered a threat to rivers today?

Back

High levels of dissolved oxygen in fast moving water are not considered a threat to rivers.

Front

What zone contains a higher, diverse level of organisms?

Back

The littoral zone contains a higher, diverse level of organisms.

Front

Which of these is NOT a characteristic of wetlands?

Back

Wetlands are not found only as inland freshwater environments.

Front

What condition can result from an increase in nutrients like phosphorous or nitrates in aquatic ecosystems?

Back

Eutrophication can result from an increase in nutrients in aquatic ecosystems.

Front

Define Eutrophication.

Back

Eutrophication is the process by which water bodies become overly enriched with nutrients, leading to excessive growth of algae.

Front

What is the role of calcium carbonate in coral reefs?

Back

Calcium carbonate is secreted by corals to form their skeletons, which contribute to the structure of coral reefs.

Front

List two threats to river ecosystems.

Back

1. Dams altering ecosystems 2. Runoff of pesticides and fertilizers from land.

Front

What is the significance of the littoral zone in aquatic ecosystems?

Back

The littoral zone is significant because it supports a diverse range of organisms due to its proximity to shore and sunlight.

Front

What are wetlands known for?

Back

Wetlands are known for their rich biodiversity and ability to provide ecosystem services such as water filtration and flood control.