IB Biology Topic C4.2.14 Restrictions on the Number of Trophic Levels in Ecosystems Revision Notes (SL/HL)

IB Biology Topic C4.2.14 Restrictions on the Number of Trophic Levels in Ecosystems Revision Notes (SL/HL) | RevisionDojo

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Energy Losses Limit Food Chains to About Four or Five Levels

Only about 10% of the energy at one trophic level reaches the next, with the mechanism detailed in C4.2.12.
After a few transfers, too little energy remains to support a further trophic level.
For this reason, food chains are usually restricted to about four or five trophic levels.

Tip

Remember the rule: energy flows, matter cycles.
Energy enters as sunlight and leaves as heat, so it cannot be reused to build extra levels.

Top Predators Are Few in Number

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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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Energy Losses Limit Food Chains to About Four or Five Levels

Only about 10% of the energy at one trophic level reaches the next, with the mechanism detailed in C4.2.12.
After a few transfers, too little energy remains to support a further trophic level.
For this reason, food chains are usually restricted to about four or five trophic levels.

Tip

Remember the rule: energy flows, matter cycles.
Energy enters as sunlight and leaves as heat, so it cannot be reused to build extra levels.

Top Predators Are Few in Number

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.

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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C4.2.14: Restrictions on the Number of Trophic Levels in Ecosystems Notes

Energy Losses Limit Food Chains to About Four or Five Levels

Top Predators Are Few in Number

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

Energy Losses Limit Food Chains to About Four or Five Levels

Top Predators Are Few in Number

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