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"Our Natural World - LICHENS" 

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Our Natural World

LICHENS

Size: 22,121 KB

Type: Microsoft Office PowerPoint

# of Slides:  30

Appropriate for grades:  3 - 12 

Description:
  

This presentation introduces students to the world of Lichenology as a branch of Mycology.  This slide show works well after the introduction of Mycology with the presentation:  "Our Natural World - Fabulous  Fungi", but also works well on its own as an introduction to lichens.

Students will learn that lichens are the organisms that begin the process of creating a foundation for habitation by others.    

Lichens are not single plants, but rather plant-like organisms that are the result of a partnership called mutualistic symbiosis between as many as three members of the Life Kingdoms.

Students learn that the dominant partner of any lichen is a fungus or mycobiont and that fungi look for partners who can make food by photosynthesis, via a photobiont.  

Good fungi partners are algae from the Protista Kingdom and Cyanobacteria, formerly called blue-green alga, from the Monera Kingdom.

A visual representation of the four lichen groupings includes lichens that are Foliose; Crustose; Fruticose; and Squamulose.

Many photographs illustrate that lichens come in a variety o f sizes, shapes and colours.

Students will learn about the various places that lichens grow and that "epiphytic" lichens are those that primarily grow on trees.

Cyanobacteria take nitrogen gas from the air and turn it into biologically usable compounds, making their symbiotic lichen relationships major contributors of soil fertility.  Acids help to break down rock to form soil.

Students will learn that since lichens are sensitive to airborne pollutants, information about their distribution is used to identify areas with pollution.

Lichen reproduction using soredia and fruiting bodies is mentioned.

The presentation ends with some fun lichen facts.

New terms:  Mycology, Lichenology, mutualistic symbiosis, mycobiont, photobiont, algae, cyanobacteria, hyphae, cholorphyll, photosynthesis, foliose, crustose, fruticose, squamulose, epiphytic, soredia, isidia, apothecia.

Created by:  

Tiiu Roiser BAA, BEd & 
Kevin Chorowiec OCT, BAS, BEd

 

 

Our Natural World - LICHENS 

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