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Ecological succession. Intro video. https://www.youtube.com/watch?v=E0qdWoLdk1c 1. In the video, what was the first organism that started to grow on the rock? 2. What was the last stage called?. Lichen. Climax community. Ecological succession. - PowerPoint PPT Presentation
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Intro video • https://www.youtube.com/watch?v=E0qdWoLdk1c
1. In the video, what was the first or-ganism that started to grow on the rock?
2. What was the last stage called?
Lichen
Climax community
Ecological succession
• Succession: a situation in which an established ecological community is gradually replaced by another until a climax community is established.
e.g.) changes in the species composi-tion of vegetation.
Before an ecological succession..
Glaciation, erosion, fire, volcanic erup-tion, or other destructive event.
The environment became barren and almost lifeless.
A Typical New York State Suc-cession
http://regentsprep.org/regents/biology/units/ecology/ecological.cfm
Pioneer organisms
• Pioneer organisms: the first organ-isms to inhabit a barren environment.
e.g.) lichen: a fungus-alga symbiotic association erodes rocks into sand
Youtube video: Lichen, the most awesome thing ever.
• http://www.youtube.com/watch?v=Te4qnLkHnS4
Intermediate stagese.g.) second succession stage Lichen and mosses prepared the soil so
grasses and other herbs could growMore organic soil Shrubs and woody
plants.
http://www.allianceforwaterefficiency.org/Shrubs_Introduction.aspx
Climax community
• A stable, self-perpetuating community that results from an ecological succes-sion.
http://www.nps.gov/slbe/planyourvisit/psbeechmaple.htm
New York: Beech-maple forest is the cli-max community.
http://regentsprep.org/regents/biology/units/ecology/ecological.cfm
Primary succession• An ecological succession in an envi-
ronment where no plants had ever lived. There is no soil at the begin-ning. Starts with ROCK!
http://www.quia.com/jg/2524430list.html
Secondary succession
• An ecological succession in an envi-ronment where some plants lived be-fore.
http://en.wikipedia.org/wiki/File:Secondary_Succession.png
Online activity
• http://www.iesalbayzin.org/descargas/AnimacionesBio-Geo/WebCTMA/succession.swf