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ARTICLE

Marine food webs

Feeding relationships are often shown as simple food chains – in reality, these relationships are much more complex, and the term ‘food web’ more accurately shows the links between producers ...

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ARTICLE

Human impacts on marine environments

Throughout human existence we have relied on the oceans – for food, as a waste dump, for recreation, for economic opportunities and so on. However, it’s not only our activities in the marine ...

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ARTICLE

Adaptations of marine organisms

Adaptation is an evolutionary process whereby an organism becomes increasingly well suited to living in a particular habitat. It is not a quick process! Natural selection over many generations ...

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ARTICLE

Poisonous animals in New Zealand

New Zealand has a very small number of poisonous animals. These animals are also called ‘venomous’ as their toxins (venoms) need to be injected by a bite (for example, spiders) or sting (for ...

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ARTICLE

Poisons and toxins

Poisons are substances that cause harm to organisms when sufficient quantities are absorbed, inhaled or ingested. A toxin is a poisonous substance produced within living cells or organisms ...

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ARTICLE

Toxins and food webs

All living things depend on one another to live. Animals eat plants and/or animals to survive. Food webs describe the feeding connections between organisms in an ecosystem. The three main groups ...

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ARTICLE

Measuring toxicity

Toxicity can be measured by the effect the substance has on an organism, a tissue or a cell. We know that individuals will respond differently to the same dose of a substance because of a number ...

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ARTICLE

Birds’ roles in ecosystems

An ecosystem consists of all of the flora and fauna living within an area and the interactions between them. All ecosystems, whether they are marine, freshwater or located in native bush, involve ...

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ARTICLE

Sea stars

When is a fish not really a fish? When it’s a starfish! Starfish is the common name for a group of animals called sea stars. Sea stars are actually part of the phylum Echinoderm and are related ...

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ACTIVITY

Build a marine food web

In this activity, students build their own food web using images of organisms from the marine ecosystem. This activity can be done indoors on paper or outdoors on a tarmac surface using chalk. By ...

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ACTIVITY

Tracking toxins

In this activity, students model bioaccumulation of toxins in marine animals. They participate in a food web game where feeding decisions determine their survival. By the end of this activity ...

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ARTICLE

Habitats, food webs and adaptations

Riley and Steve Hathaway want to change the way young people think and act towards the ocean. Their vision is to “Inspire kids to enjoy and care for the world’s oceans”. Science ideas and ...

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ARTICLE

Antarctic life and ecosystems

Antarctica – a land of extremes Antarctica is the highest, whitest, driest, coldest and windiest continent on Earth. It’s so cold that creatures often retreat to the sea to warm up. Add 24 hours ...

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ARTICLE

Marine habitats

A habitat is the area where an organism or group of organisms live and breed. One habitat will be distinct from another due to its particular environmental conditions. However, habitats are not ...

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ARTICLE

Poisonous plants in New Zealand

There are over 100 poisonous plants in New Zealand. As children grow up, they often come into contact with plants that have poisonous properties. However, children usually don’t eat enough of a ...

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TEACHER PLD

Seaweek resources

Seaweek is New Zealand’s annual national week about the sea. It is hosted by the New Zealand Association for Environmental Education and includes a wide range of events, activities, competitions ...

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