Visualization of Marsh Grass Roots and Rhizomes by CT imaging: VCR salt marshes, summer 2012

Computer-aided tomography and image processing previously has been used to accurately and rapidly quantify coarse root mass in coastal wetlands (Davey et al. 2011. Ecological Applications). The data in this data base are being used to develop the technique to allow for resolution of fine roots. The contribution of Spartina alterniflora roots-and-rhizomes (hereafter, roots) to soil volume is measured in VCR mainland marsh soils. Soil cores were collected several different marshes with differing soil types (mineral vs peaty). The cores were scanned by computer-aided tomography and image processing was used to determine the volume of living roots. Our results show that CT imaging may also be used to quantify coarse and fine root volume in salt marsh soils and that in peaty soils, coarse roots make an important contribution to soil volume (up to 53% of the soil volume is live roots). The dataset includes an extensive manual of methods, along with instructional videos.