"Endangered Animals and Plants" Resource Protection and Environmental Crisis PPT Courseware

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"Endangered Animals and Plants" Resource Protection and Environmental Crisis PPT Courseware

1: Some rare animals and plants:

The simple national treasure: the giant panda

Living environment: It is now only distributed in the green bamboo forests of the mountains in about 40 counties in Sichuan, Shaanxi, and Gansu, China, and lives a secluded life without competing with the world.

Food needed: An animal that mainly eats bamboo

Existing population: The number of giant pandas exceeds 300

Reproductive mode: viviparous

Pearl of the Orient: Zhu�

They were originally endemic birds in East Asia and were only distributed in China, North Korea and Russia, but they have all been lost since the 1960s. Did Zhu � really disappear?

In 1981, 2 nests of 7 red beetles were finally discovered in Yaojiagou, Yangxian County, Shaanxi Province, which caused a sensation in the world. Zhu's survival is due to the natural conditions suitable for its existence in the deep mountains of Yangxian County. First, the conditions for foraging in wetlands, and second, the conditions for nesting in tall trees. The people here respect the tombs of their ancestors and do not cut down the mountains and forests. This is because of this strange phenomenon. The bird's last breath provides opportunity.

According to a superstitious legend, Zhu's "�" literally means a bird that is about to become extinct, because it consists of the character "四" and the word "sorrow". How could it not mean "the bird of mourning"? Absolutely?

The high endangerment of Zhu's species is related to over-hunting, drastic forest loss and widespread application of pesticides and fertilizers.

The number of Zhu's in China has reached 248.

2: Could you please talk about the factors that lead to the endangered species?

1. Habitat destruction and loss

2. Hunting and hunting indiscriminately

3. Environmental pollution

4.Natural disasters

5. Causes of the species itself (species transformation and genetic exhaustion, often internal causes that lead to species endangerment or even extinction)

Three: Extinct animals

Thylacine: Also known as the Tasmanian tiger because of its tiger-like markings.

This rare animal, found only in Tasmania, was once prosperous 100 years ago, but because it attacked sheep, it was hunted by European immigrants.

The last thylacine died on September 7, 1936. Died at Hobart Zoo, Tasmania.

loss of species

According to relevant United Nations reports, since the beginning of the industrial revolution, the world has entered the era of the largest species extinction. Currently, hundreds of species are disappearing every day around the world. Different from the previous five mass extinctions caused by natural disasters in the history of the earth, humans have played a pivotal role in this premature sixth crisis - because of their own activities, they have destroyed the natural resources of other species. The rate of extinction increased by 100 to 1000 times. Some experts warn that after this mass extinction, it will be very difficult for new species to emerge, and when the earth's ecosystem is damaged to a certain extent, it will inevitably lead to the collapse of the system that humans rely on for survival.

One creature disappears every day in China

Do students know what this actually expresses is the common relationship between various creatures in nature?

The relationship between eating and being eaten

For example: big fish eat small fish, small fish eat shrimps, shrimps eat mud, etc.

What does the food relationship between living things look like?

Food chain: In a certain area, the relationship between various organisms due to food relationships is called a food chain.

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Update Time: 2024-10-02

This template belongs to science courseware People's Education Press Sixth Grade Science Volume 2 industry PPT template

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