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Listed under:  Science  >  Life  >  Ecosystems  >  Food webs  >  Food chains
Video

Catalyst: Chemical pollutants toxic to whales

Explore how chemical pollutants affect the Antarctic food web. A scientist shows that baleen whales are consuming Antarctic krill contaminated by accumulated residues of persistent organic pollutants (POPs) from pesticides and industrial chemicals. Find out why these pollutants are concentrated at the Earth's polar regions.

Video

Catalyst: River porpoise rescue

Can you imagine seeing porpoises leaping out of the water in a river near you? Sounds unlikely, doesn't it, but that's what people living along the banks of the Yangtze River in China often used to see. These Yangtze finless porpoises are now rapidly disappearing. Find out why and what Chinese scientist Professor Wang Ding ...

Interactive

Who's for dinner?

Look closely at a food chain and food web from a billabong habitat. Help animals to feed and survive. Play the role of a tadpole, fish or heron. Help the animal to grow and breed by feeding and avoiding predators. Notice that eating high-value food sources may increase an animal's risk of being attacked by predators.

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Old Bernie's Pond

Clean up Old Bernie's Pond. See how it has become polluted and invaded by introduced species. Restore the pond by choosing actions such as planting native species and removing sources of pollution. Look at the effects of each change. Earn points to get a certificate.

Interactive

Alien life form

Help an alien to understand how plants are adapted to life on Earth. Choose different combinations of leaves, seeds and roots. Design a plant that is best adapted to surviving in a particular environment. Adapt the plant for survival in specific environments: mangroves, cool rainforest, mountain slopes and arid land. ...

Interactive

Food chains: the desert

Create food chains to describe interactions within a desert environment. Look at the feeding patterns between plants and animals. Arrange producers and consumers into a food chain such as spinifex>bilby>eagle. This learning object is one in a series of six objects.

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Cassowary ecology quiz

Explore facts about the life of cassowaries: physical characteristics; diet; habitat; life cycles; and locations. Interact with graphs to see how much people can help cassowaries. Work through ecology notes and resources. Answer questions as you go; express your answers as fractions. This learning object is one in a series ...

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Make it alive: spotted tree frogs

Investigate the stream habitat of the endangered spotted tree frog. Discover what these frogs eat in the developing stages of their life. Find enough food so the frogs develop from the tadpole stage through to adulthood. Help the tadpoles escape from predatory fish such as the introduced rainbow trout. Search for safe places ...