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Belowground Ecology

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Overview: Our lab uses multiple methods to understand variation in below ground processes in response to tree diversity. We have examined C flux below ground using scanner-based minirhizotron technology (CI-600), IRGA technology, estimation of total below ground carbon allocation, root excavation, and (in collaboration with other labs) nitrogen mineralization and microbial community techniques. Our work has focused on three systems:

1) the intermountain west cottonwood hybrid system between native Populus trees P. angustifolia and P. fremontii (since 2001). More about the Cottonwood System.

2) second-growth temperate rainforests on the Evergreen College reserve (minirhizotron and IRGA work since 2006). More about the EEON network

3) East Cascades ponderosa pine systems (Sinlahekin valley, WA – since 2008).

Root Scanner:

The CI-600  is a scanner based technology which takes large underground images (21.59 x 19.56 cm) in buried 6.99 cm diam. acrylic tubes. For more information please see www.cid-inc.com. Here are some examples at different image resolutions: Here are some examples at different image resolutions:

75 dpi root images

200 dpi root images

600 dpi root images

For more information e-mail Dylan Fischer at : Fischerd@evergreen.edu

Dylan Fischer, PhD

Evergreen State College

2700 Evergreen Parkway NW

Olympia, WA 98505



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