SPRUCE: Manual Minirhizotron Images from Experimental Plots Beginning in 2013

This data set consists of images of fine-root birth, growth, and death collected using non-destructive minirhizotron technology from a warming × CO2 enrichment experiment in a forested, ombrotrophic bog. Minirhizotron images were collected ~ weekly or bi-weekly beginning in 2013 in the 12 SPRUCE experimental plots in paired hummock and hollow microtopography.

The dominant woody species in the bog, and the focus of our investigation, were trees Picea mariana (spruce) and Larix laricina (larch), and ericaceous shrubs Rhododendron groenlandicum and Chamaedaphne calyculata. In each of the 12 SPRUCE experimental plots, one pair of tubes was installed within a 1.5 m radius of spruce or larch trees (treed) and one pair was installed in areas dominated by ericaceous shrubs (non-treed), for a total of 48 tubes.

Each ~ weekly or bi-weekly imaging session resulted in ~4500 image files in JPEG (.jpg) format. To date (through the end of 2018) there are 291 sessions (including treed and non- treed sessions) and a total of ~625,000 images.

Citation: 

Childs J, Iversen CM, Latimer J, Burnham A, Norby RJ. 2019. SPRUCE Manual Minirhizotron Images from Experimental Plots Beginning in 2013. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.060/1490356

Typical minirhizotron root image from a treed area in July 2018. There are 110 images collected from each minirhizotron tube during each sampling event.