Methods
Dendrometers and sap flow sensors have the potential to detect stress from individual trees (and subsequently forests) in real-time. More detailed information regarding the methodology of the TreeWatch.net project coming soon.
Diameter variation
![](http://treewatch.net/wp-content/themes/tw/images/sensors/dendro_birch.jpg)
![](http://treewatch.net/wp-content/themes/tw/images/sensors/dendro_pine.jpg)
Sap flow
![](http://treewatch.net/wp-content/themes/tw/images/sensors/sf_birch.jpg)
![](http://treewatch.net/wp-content/themes/tw/images/sensors/sf_pine.jpg)