Field Notes

<--2018-06-14 12:05:00 | 2018-06-28 11:55:00-->
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East End: 2018-06-19 09:30:00 (DOY 170)
Author: Elke Eichelmann
Others: Katrina Cone, Alex Valach

Summary: Leaf level gas exchange measurements with LI-6400

We arrived around 10am, it was a sunny and clear day with a light breeze.

We took light response curves with the LI6400 for cattail and tule at East End wetland.

The Baldocchi lab 6400 with the opaque 2x3 broadleaf chamber with the LED light source was set up on the boardwalk just North of the tower to measure light response curves for cattail.
Measurements were taken 1/3 or the length of the leaf down from the tip (total length measured from the water table). Curves were measured on three different leafs. During the second set of measurements we noticed that the chamber did not seal completely around the cattail. We aborted the measurement and for any subsequent measurements the chambers were sealed with additional putty after closing to ensure they are completely sealed.
Leaf temperature was controlled to 30 degree Celsius and reference CO2 was set to 400ppm. H2O was not controlled.

Measurements on tule plants were also taken on the boardwalk north of the tower using the Silver lab 6400 and the clear conifer chamber.
Light levels inside the chamber were controlled by wrapping layers of mosquito window screen around the chamber. Up to 8 layers of mosquito screen were added. The final layer was a layer of blackout curtain to get light levels down to darkness inside the chamber. Measurements were taken on three different tule plants.
Leaf temperature was controlled to 30 degree Celsius. Incoming CO2 and H2O was not controlled.

We left around 3pm.

0 photos found

11 sets found

14 EE_met graphs found