IB Biology Topic D4.3.3 Change from Net Carbon Accumulation to Net Loss in Boreal Forests Revision Notes (SL/HL)

IB Biology Topic D4.3.3 Change from Net Carbon Accumulation to Net Loss in Boreal Forests Revision Notes (SL/HL) | RevisionDojo

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Boreal forests are a vast carbon sink now edging toward collapse

Boreal forests, also called the taiga, are one of the largest terrestrial ecosystems on Earth.
They store vast amounts of carbon through carbon sequestration, holding it in their trees and soil.
Climate change is now pushing these forests toward a tipping point, where they shift from a net carbon sink to a net carbon source.

Note

Boreal forests are estimated to cover about 11% of Earth's land surface and to store close to one-third of the planet's terrestrial carbon.

Analogy

A boreal forest works like a savings account for carbon.
While the ecosystem is healthy, it steadily stores carbon like money paid into the account.
Once stressed by climate change, it starts withdrawing more carbon than it deposits and releases it to the atmosphere.

Warmer temperatures and less snow dry out the forest and cut its carbon uptake

Climate change is driving warmer temperatures and reduced winter snowfall across boreal regions.
Increased drought: less snow means less meltwater during the growing season, so the soil dries out.

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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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Boreal forests are a vast carbon sink now edging toward collapse

Boreal forests, also called the taiga, are one of the largest terrestrial ecosystems on Earth.
They store vast amounts of carbon through carbon sequestration, holding it in their trees and soil.
Climate change is now pushing these forests toward a tipping point, where they shift from a net carbon sink to a net carbon source.

Note

Boreal forests are estimated to cover about 11% of Earth's land surface and to store close to one-third of the planet's terrestrial carbon.

Analogy

A boreal forest works like a savings account for carbon.
While the ecosystem is healthy, it steadily stores carbon like money paid into the account.
Once stressed by climate change, it starts withdrawing more carbon than it deposits and releases it to the atmosphere.

Warmer temperatures and less snow dry out the forest and cut its carbon uptake

Climate change is driving warmer temperatures and reduced winter snowfall across boreal regions.
Increased drought: less snow means less meltwater during the growing season, so the soil dries out.

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 D4.3.3: Change from Net Carbon Accumulation to Net Loss in Boreal Forests Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Boreal forests are a vast carbon sink now edging toward collapse

Warmer temperatures and less snow dry out the forest and cut its carbon uptake

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

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Boreal forests are a vast carbon sink now edging toward collapse

Warmer temperatures and less snow dry out the forest and cut its carbon uptake

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