15.1.2

What Affects the Distribution of Biomes?

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What Affects the Distribution of Biomes?

Climate (sunlight, temperature, and rainfall), altitude, the types of rock, the type of soil, and drainage all affect which biome appears where in the world.

Altitude

Altitude

  • Temperatures are lower at higher altitudes.
  • Warmer temperatures are better for supporting large and biodiverse ecosystems.
  • High altitudes are normally on mountainsides so the relief is steep.
  • Soils are thin at high altitudes because there isn't much dead plant matter (organic matter) to support nutrient cycling.
Rock type

Rock type

  • Some rocks weather/erode easily and contain lots of minerals. An area with these kinds of rocks will have more nutrient-rich soil.
  • Limestone and marble weather easily. Clay is rich in minerals.
  • The permeability of rocks also influences biomes because the permeability of rocks affects water supplies in the local area.
Soil type

Soil type

  • Nutrient-rich soils are able to support more plant life, larger ecosystems, and more biodiversity.
  • Drainage and the pH (acidity or alkalinity) of the soil will determine which kind of plants can live there.
  • Which plants can live in an area will then determine which kind of animals can live in the area.
Drainage

Drainage

  • Soil gets waterlogged easily if drainage is bad. Plants can only survive in these areas if they are adapted to damp conditions.
Jump to other topics
1

Geography Skills

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Geology of the UK

3

Geography of the World

4

Development

5

Weather & Climate

6

The World of Work

7

Natural Resources

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Rivers

9

Coasts

10

Glaciers

11

Tectonics

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Climate Change

13

Global Population & Inequality

14

Urbanisation

15

Ecosystems

16

Life in an Emerging Country

17

Analysis of Africa

18

Analysis of India

19

Analysis of the Middle East

20

Analysis of Bangladesh

21

Analysis of Russia

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