Application of Computer-Aided Tomography (CT) to the Study of Estuarine Benthic Communities

Magnetic Resonance Imaging of coarse sediment

“…in marine sediments or in fluvial hyporheic zones, repeated non-destructive mapping can be done of migration of individuals. This has to our knowledge only been attempted once with Computer Tomography (Perez et al, 1999, with a hospital CT) but not with MRI, although much MRI work has successfully been applied to study the interior of marine biota. The MRI is sensitive to the water that fills the tubes and tunnels and is contained in the tissue of the benthos.…”

“…In CT a three-dimensional image is computed from a series of X-ray images taken from various angles. CT has, for example, been used to study estuarine benthic species (Perez et al, 1999).…”

Geochemical behavior of metals–sulfide–phosphorus at SWI (sediment/water interface) assessed by DGT (Diffusive gradients in thin films) probes

“…Direct fecal deposition and the death of fauna may be expected to cause particles of labile organic matter (microniche) to be distributed heterogeneously within the sediment (Stockdale et al, 2009). The existence and properties of microniches have been investigated by microelectrodes and planar optodes (Glud et al, 1996;Klimant et al, 1995;Revsbech et al, 1980), diffusive gel based devices (Davison et al, 1997;Widerlund and Davison, 2007) and sub-mm biological survey method (Perez et al, 1999;Pike et al, 2001;Rogers and Apte, 2003).…”

Hyperspectral imaging for the characterization of athabasca oil sands drill core

“…Previous studies have investigated the use of computer-aided tomography [10] and x-ray radiographic imagery [11] to aid the identification of sedimentary features including ichnofossils and ichnofabrics. Hyperspectral imaging could provide a less expensive and more efficient alternative, provided that features are present in the surfaces exposed in a core sample.…”