"The Composition of Ecosystems" PPT courseware

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"The Composition of Ecosystems" PPT courseware

Part One: Exploring Topic 1

components of an ecosystem

1. What is an ecosystem?

In a certain area, the unified whole formed by organisms and the environment is called an ecosystem.

Ecosystems range in size from a drop of water to a river or a forest...

The largest ecosystem on Earth is the biosphere

2. Components of the ecosystem

Think: What is in the pond?

PPT on the composition of ecosystems, part 2: exploration topic 2

Food chains and food webs in ecosystems

1. Observe and think:

As shown in the picture, there are insect larvae in the bark of the tree. What is the relationship between trees, insect larvae and woodpeckers?

Characteristics of the food chain:

①The starting point is the producer;

②The arrow can only point from the prey to the predator;

③The end point should be large carnivores (the highest level consumers) that are not preyed upon by other animals;

④ The expression method cannot contain non-biological substances, energy and decomposers.

PPT on the composition of ecosystems, part three: exploration topic three

Bioconcentration and its effects

1. Bioconcentration: A phenomenon in which organisms absorb and accumulate a certain substance from the surrounding environment, causing the concentration of the substance in the organism to continuously increase.

2. Bioconcentration often occurs along the food chain.

PPT on the composition of ecosystems, part 4: Class summary

1. The concept of ecosystem

Within a certain area, organisms and the environment interact and interdependence to form a unified whole through constant material circulation and energy flow, which is called an ecosystem.

2. Components of Ecosystem

1. Biological part: green plants (producers), animals (consumers), microorganisms (decomposers).

2. Non-living parts: sunlight, air, water, temperature, etc.

3. Food chain and food web

4. Bioconcentration and its impact

Keywords: Jiangsu Education Edition eighth grade biology PPT courseware free download, composition of ecosystem PPT download, .PPT format;

For more information about the PPT courseware "The Composition of Ecosystems and Ecosystems", please click the Ecosystem PPT Composition of Ecosystems PPT tab.

"Ecosystem Composition" PPT:

"The Composition of Ecosystems" PPT Part 1 content: Overview of the objectives of this section Overview of the composition of ecosystems Overview of food chains and food webs in ecosystems Give examples of the continuous accumulation of certain harmful substances through the food chain. Putting together what the students have said, the above of pond..

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Update Time: 2024-11-22

This template belongs to biology courseware Jiangsu Education Edition 8th Grade Biology Volume 1 industry PPT template

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