IB Biology Topic D4.2.3 Deforestation of Amazon Rainforest Revision Notes (SL/HL)

IB Biology Topic D4.2.3 Deforestation of Amazon Rainforest Revision Notes (SL/HL) | RevisionDojo

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The Amazon Recycles Its Own Rainfall Through Transpiration

The Amazon rainforest regulates climate by producing oxygen, storing carbon, and recycling rainfall through transpiration.
Transpiration is the release of water vapor from plant leaves, which cools the air, forms clouds, and returns water as rain.
1. Cooling: as water evaporates from leaves it takes heat with it, cooling the surrounding air.
2. Cloud formation: the rising water vapor condenses into clouds that produce rain.
3. Rainfall recycling: up to 50% of the Amazon's rainfall is recycled this way, keeping the forest wet enough to survive.

Deforestation Sets Off a Positive Feedback Loop

Cutting down trees reduces transpiration, which starts a positive feedback loop that drives further forest loss.
1. Less transpiration: fewer trees release less water vapor, so less rain falls.
2. Drier conditions: the drier forest catches fire more easily, killing more trees.
3. Self-reinforcing cycle: each round of loss makes the next round more likely, speeding up the decline.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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The Amazon Recycles Its Own Rainfall Through Transpiration

The Amazon rainforest regulates climate by producing oxygen, storing carbon, and recycling rainfall through transpiration.
Transpiration is the release of water vapor from plant leaves, which cools the air, forms clouds, and returns water as rain.
1. Cooling: as water evaporates from leaves it takes heat with it, cooling the surrounding air.
2. Cloud formation: the rising water vapor condenses into clouds that produce rain.
3. Rainfall recycling: up to 50% of the Amazon's rainfall is recycled this way, keeping the forest wet enough to survive.

Deforestation Sets Off a Positive Feedback Loop

Cutting down trees reduces transpiration, which starts a positive feedback loop that drives further forest loss.
1. Less transpiration: fewer trees release less water vapor, so less rain falls.
2. Drier conditions: the drier forest catches fire more easily, killing more trees.
3. Self-reinforcing cycle: each round of loss makes the next round more likely, speeding up the decline.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D4.2.3: Deforestation of Amazon Rainforest Notes

The Amazon Recycles Its Own Rainfall Through Transpiration

Deforestation Sets Off a Positive Feedback Loop

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

The Amazon Recycles Its Own Rainfall Through Transpiration

Deforestation Sets Off a Positive Feedback Loop

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics