Animal Food Chains - Stage 3 Plastic Pollution

Questions and Answers

What happens to a prey population if a predator becomes extinct?

The prey population decreases significantly.

The prey population can reproduce more. (correct)

The predator finds a new food source.

The ecosystem remains unchanged.

What is a major consequence of introducing non-native species like rabbits to a new environment?

They coexist peacefully with native species.

They sustain biodiversity.

They often cause damage to existing food webs. (correct)

They support local ecosystems.

How does plastic affect marine life according to the information provided?

Plastic is used by fish for building nests.

Marine animals mistake plastic for food. (correct)

Plastic provides shelter for sea creatures.

Plastic helps filter ocean water.

Why is plastic considered a serious concern in food chains?

Microplastics are harmful and accumulate in organisms. Signup and view all the answers

What happens to plastic over time after it is thrown away?

It breaks down into microplastics. Signup and view all the answers

What do microplastics accumulate in the bodies of fish?

Pollution Signup and view all the answers

How might microplastics impact the gills of fish?

They can cause damage to gills Signup and view all the answers

What is a consequence of larger predators consuming plastic?

They are filled with toxins Signup and view all the answers

What role does the presence of microplastics play in our food supply?

They contribute to pollution in seafood. Signup and view all the answers

Why are food webs considered delicately balanced?

Changes in one species can disrupt others. Signup and view all the answers

Study Notes

Food Web Balance

Food webs rely on a delicate balance; disruption can lead to extinction and habitat loss.
Extinction of predators allows prey populations to grow unchecked, risking overpopulation and subsequent over-hunting.

Impact of Introduced Species

Rabbits were introduced to Australia in 1859, spreading rapidly within 50 years.
Their population explosion has caused significant damage to local food webs and ecosystems, rendering them a pest.

Human Impact on Food Chains

Human activities often lead to harmful substances entering food chains, disturbing natural balances.
Plastic pollution is a primary concern due to its widespread environmental effects, particularly in oceans.

Plastic Breakdown and Microplastics

Plastic is non-biodegradable and accumulates in landfills, eventually breaking down into microplastics.
Microplastics are defined as particles smaller than 5mm and can accumulate harmful pollutants in their structure.

Effects on Marine Life

Fish mistakenly consume microplastics, leading to toxins entering the food chain.
The gills of fish can absorb microplastics, potentially affecting their respiratory health and overall wellbeing.

Consequences for Human Consumption

Many fish species consumed by humans are now contaminated with microplastics due to their presence in the oceans.

Key Insights

Understanding food web dynamics is essential for ecological conservation.
Awareness of how human activities, especially plastic use and waste, impact ecosystems can guide more sustainable practices.

Description

This quiz focuses on the delicate balance of food webs and the impact of factors like extinction and habitat loss. Specifically, you'll explore the consequences of introducing non-native species, such as rabbits in Australia, on local ecosystems. Test your understanding of how these interactions shape animal food chains.