What are 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.
These are the 10 areas of lichen study in the Westside forest.
Locate at N 45º 34’ 03.9” W 122º 51’ 45.0” – which is at the SE corner of the forest.
Locate at N 45º 34’ 07.3” W 122º 51’ 45.7” – which is half way down the east side of the forest.
Locate at N 45º 34’ 08.7” W 122º 51’ 47.1” – which is at the NE corner of the forest
|Ramalina thrausta||Candelaria concolor (magnified)|
|Evernia prunastri||Hypogymnia metaphysodes|
|Hypogymnia physodes||Usnea lapponica|
|Hypogymnia tubulosa||Hypogymnia tubulosa (magnified)|
|Hypogymnia tubulosa (70x)||Hypogymnia tubulosa (150x)|
|Usnea pacificana||Usnea subserilis|