"Maintaining Ecological Balance" Biology and Environment PPT

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"Maintaining Ecological Balance" Biology and Environment PPT

Part One: Eagle, Rabbit, Grass

If we go to the grassland, we will find that there are eagles, rabbits and grasses that rabbits like to eat. Let's draw the food chain between the hawk, rabbit and grass.

grass → rabbit → eagle

What would happen if there were fewer eagles? Why?

What would happen if there were fewer rabbits? Why?

What will happen if there is less grass? Why?

If any of the above phenomena happened, what would the grassland look like?

Maintaining ecological balance PPT, part 2: What causes sandstorms

Sandstorm is a kind of severe weather that pollutes the environment and endangers our lives. In recent years, sandstorms have occurred more and more frequently in northern my country, and have even begun to affect other areas of our country.

In the north of our country, there are many semi-arid grassland areas. In addition to cattle and sheep grazed by humans, there are also carnivorous falcons, foxes and wolves; omnivorous rats; herbivorous rabbits; as well as locusts, grasshoppers and other insects. and our beloved larks. The Chinese medicinal material licorice and Nostoc, a rare specialty product exported to foreign countries, also grow there, but the local ecological balance is being destroyed.

What human interference activities have caused the imbalance of the grassland ecosystem?

Overgrazing, deforestation, hunting of wild animals, blind mining...

What are the consequences of these actions?

The grassland ecosystem is out of balance and the grassland is desertified...

What is the end result?

Causing sandstorms...

In order to maintain ecological balance, what should we humans do?

Do not hunt wild animals, establish nature reserves, and protect endangered animals and plants

Prohibition of indiscriminate logging and afforestation

Reduce waste water, exhaust gas and other pollution

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For more information about the "Biology and Environment Maintaining Ecological Balance" PPT courseware, please click the Biology and Environment PPT Maintaining Ecological Balance PPT tab.

"Maintaining Ecological Balance" Biology and Environment PPT download:

"Maintaining Ecological Balance" Biology and Environment PPT Download Part One Content: Collaborative exploration Taking eagles, rabbits, and grass as examples to explore the ecological balance of the grassland and the food relationship between the three. Imagine: What would happen if there were fewer eagles? ? If there are fewer rabbits,...

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4:

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 4 Knowledge Points: This chain-link-like food relationship between organisms is called a food chain. The same kind of plant will be eaten by different animals, and the same kind of animal can eat different foods. The complex food relationship between living things forms...

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 3:

"Maintaining Ecological Balance" Biology and Environment PPT Courseware 3 Ecological Community and Its Ecological Balance The organisms in a certain area in nature form a balanced and harmonious whole, called a biological community. If one part of a biological community is destroyed, the entire ecosystem will be out of balance...

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Update Time: 2024-11-16

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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