Aquatic Ecosystems and Their Features

The video explores aquatic ecosystems, focusing on abiotic and biotic factors. It discusses the impact of sunlight, temperature, nutrients, and salinity on aquatic life. The video examines freshwater, estuaries, and saltwater ecosystems, using New York City as a case study. It highlights the importance of wetlands, salt marshes, and the different zones in saltwater ecosystems. The video concludes with a review of key concepts and encourages students to engage with questions.

Which factor is NOT considered an abiotic factor affecting aquatic life?

• Dissolved nutrients

• Fish population

• Sunlight availability

• Water depth

What percentage of Earth's surface water is freshwater?

• 10%

• 3%

• 25%

• 50%

Which of the following is a source of freshwater?

• Mangrove swamps

• Ocean tides

• Rainwater runoff

• Salt marshes

What is a wetland where saltwater and freshwater mix called?

• Lake

• Reservoir

• Estuary

• Pond

Which type of plant is commonly found in salt marshes?

• Cacti

• Salt-tolerant grasses

• Mangrove trees

• Kelp

What is the primary characteristic of the intertidal zone?

• Deep ocean waters

• Freshwater mixing

• Exposed to air at low tide

• Permanently submerged

Which of the following is NOT found in the coastal ocean?

• Coral reefs

• Horseshoe crabs

• Mangrove trees

• Kelp forests

What is a unique feature of the open ocean?

• Freshwater sources

• Permanent darkness in lower parts

• High salt concentration

• Shallow waters

What is the main source of energy in the open ocean's lower parts?

• Salt-tolerant plants

• Sunlight

• Photosynthesis

• Falling organic matter

What helps stabilize an ecosystem after a disaster?

• Lack of competition

• Diversity in organisms

• Absence of producers

• High salt concentration