Negative Human Impact on Ecosystems

Multiple Choice

Oil spills in the ocean affect marine food webs. Animals that are initially affected by oil spills include sea otters, seabirds, and other organisms that spend most of their time on the ocean surface.

Based on the food web, how would a significant decrease in the sea otter population due to an oil spill most likely affect this ecosystem?

• The sea urchin population would increase causing the kelp population to decrease.

• The fish population would increase in response to the changes in the mussel population.

• The mussel population would increase in response to the changes in the algae population.

• The killer whale population would increase causing the fish population to decrease.

Fill in the Blanks

According to this graph, from the year 1850, it took about

years for the population to increase by 5 billion. Write your answer in numbers.

Multiple Choice

What are the negative effects of urbanization as described in the image?

• Habitat Destruction

• Resource Strain

• Waste Concentration

• All of the above

Multiple Choice

Lily is working on a school project about sustainable farming practices. She learns about different irrigation methods. Which of the following is a benefit of using drip irrigation in agriculture?

• Increases water runoff

• Reduces water usage

• Enhances soil erosion

• Requires more labor

Multiple Choice

Based on the graphs, which species has shown a significant decline in population size since 1950?

• Atlantic Bluefin Tuna

• African Elephant

• Black Rhino

• All of the above

Multiple Choice

Chemical pesticides tend to be used in terrestrial ecosystems, but they are commonly found in the tissues of aquatic organisms. Because of this, birds and other animals with a diet high in fish commonly suffer the effects of biological magnification. How do these pesticides end up in these aquatic ecosystems?

• Pesticides evaporate and are delivered to water sources by rainfall

• Land animals containing pollutants die and decompose in waterways

• Pesticides are carried to water sources by freshwater runoff.

Multiple Choice

Kudzu has overgrown many parts of South Carolina and native ground plants have disappeared from the area. This is an example of ---

• Parasitism between kudzu and the native plants.

• A predator prey relationship between ground plants and kudzu.

• Competition occurring between the native and invasive species.

• Commesalism occurring between the kudzu and native plants.

Multiple Choice

What are the three key domains through which pollutants travel?

• Air

• Land

• Water

• Soil

Multiple Choice

What are the types of pollutants mentioned in the image?

• Greenhouse Gases

• Sulfur & Nitrogen Oxides

• Particulates & Smog

• All of the above

Multiple Choice

What negative effect does landfill pollution have on land?

• Increased biodiversity

• Habitat Destruction

• Soil enrichment

• Water purification

Multiple Choice

What is true about the conditions of a body of water undergoing eutrophication?

• high nutrients; low algae; low oxygen

• high nutrients; high algae, low oxygen

• low nutrients; high algae; high oxygen

• low nutrients; low algae; low oxygen

Multiple Choice

What are the factors contributing to population growth as shown in the ecosystem of impact diagram?

• Urbanization

• Overfishing

• Pesticides

• Overgrazing

Multiple Choice

What is the significance of understanding the cascade from driver to consequence in relation to the health of our planet?

• It helps in making informed decisions

• It has no impact on environmental issues

• It is only relevant to scientists

• It is a theoretical concept

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident