a guide to AIR QUALITY MONITORING with LICHENS

 
 

TABLE OF CONTENTS

Preface
List of illustrations
General Information about Lichens and Air Pollution
     What is a lichen?
     Do lichens harm trees?
     Lichens need water and minerals
     Air pollution
     Lichens and air pollution
     Why examine lichens on branches?
     Why use five year-old and ten-year-old twigs?
     How can we tell the age of a twig?
Mapping Lichens and Air Quality in the WillametteValley
How to Use the Guide
     Equipment
     Selecting the tree
     Selecting branches
     Finding five and ten-year-old twigs
     Identifying the lichens
     Which form should you use?
     Estimating lichen cover
     Using Form #1
     Using Form #2
Air Quality Evaluation Form #1
Air Quality Evaluation Form #2
Glossary
Bibliography