U3_ECOSYSTEMS_gamificada

Hi guys... I know you have recently visited a country in Africa near mine... Did you like it? Now, I'm afraid you will travel "a little farther..."

UNIT 3: ECOSYSTEMS

START

table of contents

1. guess the destination

2. what's an ecosystem?

3. trophic relationships

4. ecosystems classification

5. the biosphere

6. why do ecosystems change?

7. summary

GUESS THE DESTINATION

1.

Let's start the game!

Ready for a little guessing?

first clue:

We are heading to The Land of Oz.

SECOND clue:

It has a larger population of camels than Egypt.

THIRD clue:

It was the second country in the world to grant women the right to vote in 1894.

FOURTH clue:

It has one of the lowest population densities in the world.

FIFTH clue:

Mining is one its biggest industries.

AND THE ANSWER IS...

AUSTRALIA'S GEOGRAPHICAL DIVERSITY

Yes! Australia is one of the most geographically diverse continent-country in the world. As you have seen in the video, its open spaces vary from the vast deserts to the peaceful outback, from the colourful Great Barrier Reef to the impressive rock formations such as Uluru Mount... This is why we thought it was the perfect place to study about ECOSYSTEMS.

2. WHAT'S AN ECOSYSTEM?

2. WHAT'S AN ECOSYSTEM?

An ecosystem includes all living and non-living things in a particular place and the relationships between them. This particular place where living and non-living things relate with each other is called habitat.

An ecosystem is made of two parts: the biotope and the biocoenosis.

The biotope or physical environment includes all non-living things in the ecosystem , such as geographical relief, soil, light and temperature.

The biocoenosis includes all the living things in the ecosystem, such as animals, plants and other organisms.

2. WHAT'S AN ECOSYSTEM?

The living things in an ecosystem (biocoenosis) don't usually live in isolation. On the contrary, they form groups called "populations" and "communities." A "population" is a group of organisms that live together and belong to the same species. A "community" is a collection of different populations that live together in one place or "habitat."

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Animals eat plants or other animals in their ecosystem. The relationships between the organisms that eat and the organisms that are eaten are called trophic relationships.

3. TROPHIC RELATIONSHIPS

1. Plants are producers: they make their own food.

2. Caterpillars are herbivores. They are primary consumers: they feed on plants.

3. Praying mantis are carnivores. They are secondary consumers: they feed on herbivores.

4. Owls are carnivores too. They are tertiary consumers: they feed on secondary consumers.

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5. Fungi and bacteria are decomposers: they break down the remains of dead organisms.

3. TROPHIC RELATIONSHIPS II

Exactly... as Dr Binocs explains at the end of the video, the food chains are not as direct as in the previous example. On the contrary, food chains are interconnected. In any habitat there may be many kinds of animals that feed on the same plants and there may be many predators that feed on the same kinds of prey. Therefore there will be several food chains in any habitat. These food chains are inter-linked and they form food networks.

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4. ECOSYSTEMS CLASSIFICATION

WOODLAND ECOSYSTEM

COAST ECOSYSTEM

POND ECOSYSTEM

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4. ecosystems classification II

CITY ECOSYSTEM

PRAIRIE ECOSYSTEM

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5. what's the biosphere?

The biosphere is the part of the Earth where life is possible. It includes the oceans, the land, the atmosphere and all the living things on the planet.

biosphere

biome

habitat

An ecosystem can also have different habitats. This type of ecosystem is called biome.

The place where a population lives is called a habitat. Sometimes different populations can all live in the same habitat.

It is the biggest known biome. It includes all the habitats on Earth.

6. why do ecosystems change?

HUMAN ACTIVITY

NATURAL CHANGES

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summing up

THANK YOU FOR LISTENING