Impact of Humans on Ecosystems

What is a food web?

• A food web is a diagram that only includes plants and herbivores.

• A food web is a single linear chain of organisms that shows who eats whom.

• A food web is a network of food chains that shows how different organisms are interconnected through feeding relationships in an ecosystem.

• A food web is a type of food that is served in restaurants.

How do humans affect the food chain?

• Humans only affect the food chain through agricultural practices.

• Humans have no impact on the food chain whatsoever.

• Humans affect the food chain by disrupting ecosystems and altering species populations.

• Humans enhance biodiversity by protecting endangered species.

What happens when a predator is removed from an ecosystem?

• The prey species become extinct due to lack of competition.

• The predator population decreases, leading to more biodiversity.

• The ecosystem becomes more stable and balanced.

• The prey population increases, leading to potential overgrazing and ecosystem imbalance.

Name one way pollution impacts food webs.

• Pollution increases the number of species in a food web.

• Pollution introduces toxins that disrupt food web dynamics.

• Pollution has no effect on food web interactions.

• Pollution only affects air quality, not food webs.

How can deforestation affect animal populations?

• Deforestation has no effect on animal populations or their habitats.

• Deforestation increases animal populations by providing more open space.

• Animal populations thrive after deforestation due to increased food availability.

• Deforestation negatively impacts animal populations by causing habitat loss, reducing resources, increasing competition, and isolating populations.

What role do decomposers play in an ecosystem?

• Decomposers compete with plants for sunlight.

• Decomposers are primary consumers in the food chain.

• Decomposers recycle nutrients and help maintain ecosystem balance.

• Decomposers produce energy for plants.

How does overfishing impact marine food webs?

• Overfishing increases fish populations and stabilizes food webs.

• Overfishing disrupts marine food webs by destabilizing predator-prey relationships and causing trophic cascades.

• Overfishing has no effect on marine ecosystems.

• Overfishing only affects the fishing industry, not marine life.

What is the effect of introducing non-native species?

• Non-native species can harm local ecosystems and biodiversity.

• Non-native species are always beneficial to local wildlife.

• Non-native species have no impact on ecosystems.

• Non-native species improve local biodiversity.

Why is biodiversity important for a healthy ecosystem?

• Biodiversity is only important for aesthetic purposes.

• Biodiversity has no impact on food webs.

• Biodiversity is crucial for maintaining ecosystem health and resilience.

• Biodiversity decreases competition among species.

How can humans help restore damaged ecosystems?

• Planting non-native species

• Humans can restore damaged ecosystems through reforestation, invasive species removal, and sustainable practices.

• Overharvesting natural resources

• Ignoring pollution sources