IB Biology Topic B4.1.1 Habitat as the Place in Which a Community, Species, Population or Organism Lives Revision Notes (SL/HL)

IB Biology Topic B4.1.1 Habitat as the Place in Which a Community, Species, Population or Organism Lives Revision Notes (SL/HL) | RevisionDojo

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Habitat: The Place That Supplies Everything an Organism Needs to Live

Definition

Habitat

A habitat is the specific place where an organism, population, species, or community lives. The word comes from the Latin habitare, meaning "to live."A

A habitat has two main elements.
1. Geographical location is the physical area an organism lives in.
2. Physical conditions are the abiotic factors there, such as temperature, light, soil type, and water availability.
A habitat includes all the biotic (living) and abiotic (non-living) factors that affect an organism there.
Habitats vary hugely in scale, from a whole tropical rainforest down to the underside of a single leaf.

Example

The habitat of Ranunculus glacialis is high-altitude mountainous regions in Europe.
The abiotic conditions there include winter snow cover, well-drained soils, and intense summer sunlight.

Who Lives in a Habitat: From a Single Organism up to the Whole Community

An organism is a single living individual, such as one polar bear on Arctic sea ice.
A population is all the organisms of one species living in the same area, such as the polar bears in one region.
A species is all the organisms that can interbreed, such as every polar bear worldwide.
A community is all the populations living together in a habitat, such as polar bears, seals, fish, and algae in the Arctic.
Each of these levels depends on its habitat for both resources and suitable abiotic conditions.

Tip

When you describe a habitat, name both its abiotic conditions and the type of ecosystem it sits within.

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Definition

Paywall

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

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Note

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Tip

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IB Biology Topic B4.1.1: Habitat as the Place in Which a Community, Species, Population or Organism Lives Notes

Habitat: The Place That Supplies Everything an Organism Needs to Live

Who Lives in a Habitat: From a Single Organism up to the Whole Community

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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Habitat: The Place That Supplies Everything an Organism Needs to Live

Who Lives in a Habitat: From a Single Organism up to the Whole Community

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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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B4.1.1: Habitat as the Place in Which a Community, Species, Population or Organism Lives Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Habitat: The Place That Supplies Everything an Organism Needs to Live

Who Lives in a Habitat: From a Single Organism up to the Whole Community

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

Habitat: The Place That Supplies Everything an Organism Needs to Live

Who Lives in a Habitat: From a Single Organism up to the Whole Community

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