4.3 Human Impact on Ecosystems

What is deforestation?

• Deforestation is the process of conserving forests by cutting down trees.

• Deforestation is the process of planting more trees in forests.

• Deforestation is the process of clearing forests by cutting down trees.

• Deforestation is the process of building new houses in forests.

How does deforestation affect ecosystems?

• Deforestation increases biodiversity

• Deforestation has no impact on ecosystems

• Deforestation helps in maintaining the water cycle

• Deforestation disrupts the balance of oxygen and carbon dioxide, reduces biodiversity, causes soil erosion, and impacts the water cycle.

What are some examples of pollution in ecosystems?

• Air pollution, water pollution, soil pollution, noise pollution

• Land pollution

• Thermal pollution

• Light pollution

Explain the impact of pollution on aquatic ecosystems.

• Pollution benefits aquatic ecosystems by providing nutrients

• Pollution has no impact on aquatic ecosystems

• Pollution impacts aquatic ecosystems by decreasing water quality, harming aquatic life, disrupting the ecosystem balance, reducing biodiversity, and potentially causing species extinction.

• Pollution in aquatic ecosystems leads to increased biodiversity

What is overfishing and why is it harmful?

• Overfishing is harmful because it depletes fish populations, disrupts marine ecosystems, leads to loss of biodiversity, and negatively impacts the food chain.

• Overfishing is a sustainable practice that does not harm marine life.

• Overfishing is beneficial as it increases fish populations and improves marine ecosystems.

• Overfishing has no impact on biodiversity or the food chain.

How does overfishing disrupt marine food chains?

• Overfishing helps maintain a balanced marine ecosystem.

• Overfishing depletes key species, leading to imbalances in the ecosystem.

• Overfishing has no impact on marine food chains.

• Overfishing promotes biodiversity in marine ecosystems.

What are the main causes of climate change?

• Deforestation

• Solar activity

• Volcanic eruptions

• Greenhouse gas emissions from human activities

Describe the effects of climate change on ecosystems.

• Climate change has no impact on ecosystems

• Climate change can disrupt ecosystems by altering temperature, precipitation patterns, and sea levels. This can lead to habitat loss, species extinction, changes in migration patterns, and disruptions in food chains.

• Climate change only affects individual species within ecosystems

• Ecosystems thrive under climate change

What are invasive species and how do they impact ecosystems?

• Invasive species are non-native organisms that cause harm to the ecosystem they invade by outcompeting native species, disrupting food chains, altering habitats, and spreading diseases.

• Invasive species have no impact on ecosystems and are beneficial for native species.

• Invasive species are only harmful in certain ecosystems, but not all.

• Invasive species are native organisms that benefit ecosystems by increasing biodiversity.

Provide an example of an invasive species and its effects on a specific ecosystem.

• Lionfish in the Arctic ecosystem

• Asian carp in the Amazon rainforest

• Kudzu in the Sahara desert

• Zebra mussel in the Great Lakes ecosystem