Microplastics and Marine Ecosystems

The video discusses human impacts on aquatic ecosystems, focusing on range of tolerance, oil spills, nutrient pollution, sediment pollution, plastic waste, and heavy metals. It explains how these factors affect marine life, including coral reefs, oxygen levels, and bioaccumulation. The video also highlights the importance of understanding these impacts for both environmental and human health.

What is the range of tolerance in an ecosystem?

• The range of temperatures an organism can survive

• The optimal conditions for an organism to maintain homeostasis

• The range of food sources available to an organism

• The range of predators an organism can avoid

Which of the following is NOT a threat to coral reefs?

• Increasing ocean temperature

• Sediment runoff

• Destructive fishing practices

• Increased salinity

How do oil spills affect marine animals on the surface?

• By providing shelter

• By increasing their food supply

• By improving their waterproofing

• By covering their feathers and fur, affecting temperature regulation

What is the primary cause of ocean dead zones?

• Sediment pollution

• Plastic waste

• Oil spills

• Nutrient pollution

What does a high biochemical oxygen demand indicate?

• Low levels of organic matter

• High levels of nutrient pollution

• High levels of dissolved oxygen

• Low levels of nutrient pollution

What is a consequence of increased turbidity in water bodies?

• Improved water quality

• Enhanced fish growth

• Decreased predator visibility

• Increased photosynthesis

What are microplastics?

• Large pieces of plastic waste

• Tiny, partially degraded plastics

• Biodegradable plastics

• Natural fibers found in the ocean

Which heavy metal is commonly associated with neurological damage?

• Chromium

• Copper

• Mercury

• Lead

What does bioaccumulation refer to?

• The release of toxins into the environment

• The reduction of pollutants in a food chain

• The accumulation of substances within an organism

• The breakdown of pollutants in an organism

What was a significant outcome of the Minamata disaster?

• Increased fish population

• Decreased industrial pollution

• Improved water quality

• Widespread mercury poisoning