IB Biology Topic D4.2.2 Requirements for Stability in Ecosystems Revision Notes (SL/HL)

IB Biology Topic D4.2.2 Requirements for Stability in Ecosystems Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Stable Ecosystems Need Energy, Nutrients, Diversity, and a Steady Climate

A steady supply of energy keeps productivity going.
Continuous nutrient recycling returns carbon, nitrogen, and phosphorus to the ecosystem.
High genetic diversity lets populations adapt to disease, climate, and other stresses.
Stable climatic conditions keep temperature, rainfall, and humidity within species' tolerance limits.

Energy Flow Sustains Productivity

Ecosystems rely on a steady energy supply from the Sun to drive photosynthesis and feed every trophic level.
When that supply is cut, productivity falls and the whole ecosystem can lose stability.

Example

The eruption of Mount Tambora in 1815 cut global sunlight, slowing photosynthesis and causing ecosystem collapses.

Nutrient Cycling Prevents Resource Loss

Nutrient cycling keeps carbon, nitrogen, and phosphorus available for life processes.

Nice try, unfortunately this paywall isn't as easy to bypass as you think. Want to help devleop the site? Join the team at https://revisiondojo.com/join-us. exercitation voluptate cillum ullamco excepteur sint officia do tempor Lorem irure minim Lorem elit id voluptate reprehenderit voluptate laboris in nostrud qui non Lorem nostrud laborum culpa sit occaecat reprehenderit

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

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 nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

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 nisi ut aliquip ex ea commodo consequat.

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.

Unlock the rest of this chapter with a free account

Stable Ecosystems Need Energy, Nutrients, Diversity, and a Steady Climate

A steady supply of energy keeps productivity going.
Continuous nutrient recycling returns carbon, nitrogen, and phosphorus to the ecosystem.
High genetic diversity lets populations adapt to disease, climate, and other stresses.
Stable climatic conditions keep temperature, rainfall, and humidity within species' tolerance limits.

Energy Flow Sustains Productivity

Ecosystems rely on a steady energy supply from the Sun to drive photosynthesis and feed every trophic level.
When that supply is cut, productivity falls and the whole ecosystem can lose stability.

Example

The eruption of Mount Tambora in 1815 cut global sunlight, slowing photosynthesis and causing ecosystem collapses.

Nutrient Cycling Prevents Resource Loss

Nutrient cycling keeps carbon, nitrogen, and phosphorus available for life processes.

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 D4.2.2: Requirements for Stability in Ecosystems Notes

Stable Ecosystems Need Energy, Nutrients, Diversity, and a Steady Climate

Energy Flow Sustains Productivity

Nutrient Cycling Prevents Resource Loss

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

Stable Ecosystems Need Energy, Nutrients, Diversity, and a Steady Climate

Energy Flow Sustains Productivity

Nutrient Cycling Prevents Resource Loss

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