"Protecting Biological Diversity" PPT Courseware 2

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"Protecting Biological Diversity" PPT Courseware 2

1. Threats to biodiversity

in natural state

On average, one bird species becomes extinct every 2,000 years

One mammal becomes extinct every 8,000 years

under the influence of human activities

On average, one bird species becomes extinct every 2 years

On average, one mammal becomes extinct every 1.2 years

Species are becoming extinct at a rate thousands of times faster than "natural selection"

2. Reasons why biodiversity is facing threats

Analyze the textbook P100 information and discuss what are the reasons why biodiversity is facing threats?

Change and destruction of living environment;

Predatory development and exploitation;

environmental pollution;

Impact of alien species

In addition to the above factors, what other factors have caused the sharp decline in biodiversity?

Air Pollution;

overexploitation, overfishing;

the growth of industrialization and urbanization;

Inadequate laws and regulations;

global climate change……

3. Protect biological diversity

People divide a certain area of ​​land or water body including protected objects for protection and management.

Establishing nature reserves is the most effective measure to protect biological diversity

Nature reserves are “natural gene banks” capable of preserving many species and various types of ecosystems;

Nature reserves are "natural laboratories" for scientific research and provide a good base for biological scientific research;

Nature reserves are "living natural museums" and important places to popularize biological knowledge to people and promote the protection of biological diversity.

Move certain endangered species out of their original places and into zoos, botanical gardens, aquariums and endangered animal breeding centers for special protection and management;

Establish a germplasm bank for endangered species (plant seed bank, animal sperm bank, etc.).

Class summary

Why is biological diversity under threat?

Changes and destruction of living environment

Predatory development and exploitation

environmental pollution

Impact of alien species

What are the main measures that should be taken to protect biological diversity?

Establishment of nature reserves

Relocation and conservation

Establishing a germplasm bank of endangered species

Keywords: Teaching courseware for protecting biological diversity, download PPT courseware for eighth-grade biology from the first volume of the People's Education Edition, download courseware for eighth-grade biology slides, download PPT courseware for protecting biological diversity, .PPT format;

For more information about the "Protecting Biological Diversity" PPT courseware, please click the "Protecting Biological Diversity ppt" tab.

"Protecting Biological Diversity" PPT courseware 7:

"Protecting Biological Diversity" PPT Courseware 7 The extinction of species is a natural process, but current human activities have greatly accelerated the rate of species extinction. Once a species becomes extinct, it cannot be regenerated. The destruction of biological diversity will cause problems in agriculture, medicine and health care.

"Protecting Biological Diversity" PPT courseware 6:

"Protecting Biological Diversity" PPT Courseware 6 In the natural state, one kind of bird becomes extinct in an average of 2000 years, and one kind of mammal becomes extinct in an average of 8000 years. Now, under the influence of human activities, one kind of bird becomes extinct in an average of 2 years, and an average of one kind of mammal becomes extinct in 1.2 years. Animals become extinct...

"Protecting Biological Diversity" PPT courseware 5:

"Protecting Biological Diversity" PPT Courseware 5 Review of the previous section: 1. What is the connotation of biological diversity? 2. What are the fundamental measures to protect biological diversity? 3. The diversity of biological species is essentially diversity. [Think about it and discuss it] The white-tip dolphin is...

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Update Time: 2024-10-03

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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