"Ecosystem Overview" PPT download

Description

"Ecosystem Overview" PPT download

Part 1: What is an ecosystem?

The Kaiba Forest in North America is mainly composed of pine, fir and spruce, with a variety of herbaceous plants growing in the forest understory. More than 100 years ago, there were approximately 4,000 black-tailed deer in the forest eating leaves or herbs. Wolves feed on black-tailed deer, and vicious cougars often hunt wolves and black-tailed bears. In the forest, the sun shines brightly, the air is fresh, the soil is fertile, the water is sufficient, and the temperature is suitable... Indians and various creatures live harmoniously in this forest, and the forest presents a vibrant scene everywhere.

1. Concept:

In a certain natural area, all living things and their living environment constitute a whole

2. Type:

Can you try to tell what types of ecosystems there are?

forest ecosystem

Various types of forests occupy 28.5% of the land area

grassland ecosystem

Various grasslands, accounting for 25% of the land area

marine ecosystem

It has a vast area, accounting for about 71% of the total area of ​​the earth.

farmland ecosystem

All cultivated land, accounting for 10% of the land area

freshwater ecosystem

Such as lakes, ponds, etc., their water volume is less than 1% of the global water volume

desert ecosystem

Refers to a natural area with arid climate, scarce precipitation, and poor vegetation.

Ecosystem overview PPT, part 2: components of the ecosystem

Think: Do the following constitute an ecosystem?

1. All the animals in a meadow.

2. All fish species in the Yangtze River Basin of my country.

3. Mangroves are common in all seasons on Hainan Island.

4. A piece of rotten wood and all the living things such as moss, ants, fungi, etc. growing on it.

Keywords: Beijing Normal University Edition Biology PPT courseware for eighth grade volume 2 free download, ecosystem overview PPT courseware, .PPT format;

For more information about the "Ecosystem and its Stability Ecosystem Overview" PPT courseware, please click the Ecosystem and its Stability PPT Ecosystem Overview PPT tab.

"Ecosystem Overview" PPT courseware:

"Ecosystem Overview" PPT courseware Part One: Learning Objectives 1. State the concept of ecosystem. 2. Outline the composition of ecosystems and concepts such as producers, consumers, and decomposers. 3. Understand the role of various components in ecosystems. ... ....

"Ecosystem Overview" PPT:

"Ecosystem Overview" PPT Part One: What is an Ecosystem? The Kaiba Forest in North America is mainly composed of pine, fir and spruce. A variety of herbaceous plants also grow in the bottom layer of the forest. More than 100 years ago, there were about 4,000 black-tailed deer in the forest eating leaves or grass...

File Info

Update Time: 2024-06-18

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

Preview