Lichen study

What are Lichen?

Lichen

Lichen are very cool! A lichen is a combination of algae and fungus living together. We are studying the lichen in Rock Creek's Westside Forest - identifying and quantifying the lichen species in 10 areas of the forest. Each area studied is approximately 2 meters square, beginning at ground level and going up to a height of 5 feet.

The purpose of our ongoing study is to ultimately track the sensitive species of lichen. Lichen are excellent indicators of air quality. We are hypothesizing that the sensitive species will decline in number as the impacts of urban growth become apparent. We hope you enjoy viewing our photos and learning more about these interesting organisms.

Study map

These are the 10 areas of lichen study in the Westside forest.

Westside Forest Sampling Sites

Area 1

Locate at N 45º 34’ 03.9” W 122º 51’ 45.0” - which is at the SE corner of the forest.

Area 1 - Winter 2007 Area 1 - Spring 2007

Parmeliopsis hyperopta (70x)

Parmeliopsis hyperopta (70x)

Platismatia glauca - top view (70x)

Platismatia glauca - top (70x)

Platismatia glauca (300x)

Platismatia glauca (300x)

Parmeliopsis hyperopta (300x)

Parmeliopsis hyperopta (300x)

Platismatia glauca - bottom view (70x)

Platismatia glauca - bottom (70x)

Not yet identified

Area 1 unidentified

 

Area 2

Locate at N 45º 34’ 07.3” W 122º 51’ 45.7” - which is half way down the east side of the forest.

Area 2 - Winter 2007 Area 2 - Spring 2007

Cladonia bellidiflora

Cladonia bellidiflora

Ramalina farinacea

Ramalina farinacea

Area 3

Locate at N 45º 34’ 08.7” W 122º 51’ 47.1” – which is at the NE corner of the forest

Area 3 - Winter 2007Area 3 - Spring 2007

Ramalina thrausta

Ramalina thrausta

Candelaria concolor (magnified)

Candelaria concolor  (magnified)

Evernia prunastri

Evernia prunastri

Hypogymnia metaphysodes

Hypogymnia metaphysodes

Hypogymnia physodes

Hypogymnia physodes

Usnea lapponica

Usnea lapponica

Hypogymnia tubulosa

Hypogymnia tubulosa

Hypogymnia tubulosa (magnified)

Hypogymnia tubulosa  - magnified

Hypogymnia tubulosa (70x)

Hypogymnia tubulosa  - 70x

Hypogymnia tubulosa (150x)

Hypogymnia tubulosa  - 150x

Usnea pacificana

Usnea pacificana

Usnea subserilis

Usnea subserilis