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Ecological Succession and
Biomes
Ames Allen-King
Ecological Succession
 Changes in an ecosystem
 Caused by organisms having biotic (living) and
abiotic (nonliving) interactions
 Primary succession
 Secondary Succession
Primary Succession
 Occurs in an environment where no organisms
previously existed
 Example: Volcan Osorno, Chile
Secondary Succession
 Where ecosystems already exist, but are replaced
 Not necessarily a change in organism
 Example: Forest Fire
Biomes
 A type of ecosystem found around the world
 Rainfall and Temperature determine what kind of
ecosystem exists.
 All the biomes in the world together = Biosphere
The Major Biomes
 Desert
 Grassland
 Shrubland
 Temperate Deciduous Forest
 Tropical Rainforest
 Tundra
Deserts
 Rainfall very low
 Warm/hot days with cold nights
 Very few plants
Desert (Continued)
Grassland
 Rainfall low
 Warm/hot summers but cold winters
 Mostly shorter grasses and herbs
Grassland Continued
Shrubland
 Cool, wet winters with hot dry summers
 Frequent fires during summer
 Draught-resistant plants
 Evergreen foliage
Shrubland (Continued)
Temperate Deciduous
Forest
 Moderate rainfall
 Warm summers and cool winters
 Mainly trees that shed their leaves in winter
Temperate Deciduous
Forest (Continued)
Tropical Rainforest
 Large amounts of rainfall
 Hot or very hot year-round
 Tall evergreen trees, smaller trees, and shrubs and
herbs dominate.
Tropical Rainforest
(Continued)
Tundra
 Very low temperatures
 Little precipitation, mainly snow
 Small trees
 Mosses and lichens frequent
Tundra (Continued)
Bibliography

http://www.blueplanetbiomes.org/desert.htm

http://www.ayacara.cl/Excursion%20saltos%20de%20petrohuevolcan%20osorno.htm

http://www.harrissouthnorwood.org.uk/165/inside-a-tropical-rainforest

http://commons.wikimedia.org/wiki/File:Death_Valley,19820816,Desert,inc
oming_near_Shoshones.jpg

http://florc.edu.glogster.com/tropical-rainforest/

http://www.blueplanetbiomes.org/rainforest.htm

http://www.blueplanetbiomes.org/tundra.htm

http://environment.nationalgeographic.com/environment/habitats/tundraprofile/
Bibliography (Continued)

http://earthobservatory.nasa.gov/Experiments/Biome/biograssland.php

http://www.blueplanetbiomes.org/grasslands.htm

http://en.wikipedia.org/wiki/Shrubland

http://www.blueplanetbiomes.org/chaparral.htm

http://www.marietta.edu/~biol/biomes/tempded.htm

https://wildtracks.wordpress.com/world-ecosystems/forestecosystems/temperate-forest-ecosystem/

http://www.blueplanetbiomes.org/deciduous_forest.htm

Allott, Andrew. Biology for the IB Diploma: Standard and Higher Level. 2nd
ed. Oxford: Oxford University Press, 2011.