Geophysics provides a multidimensional suite of investigative methods that are transforming
our ability to see into the very fabric of the subsurface environment, and monitor the …

In the last three decades we have learned a great deal about microbes in subsurface
environments. Once, these habitats were rarely examined, perhaps because so much of the …

The globally important nature of wetland ecosystems has led to their increased protection
and restoration as well as their use in engineered systems. Underpinning the beneficial …

Low-frequency geoelectrical methods include mainly self-potential, resistivity, and induced
polarization techniques, which have potential in many environmental and hydrogeological …

The self-potential method enables non-intrusive assessment and imaging of disturbances in
electrical currents of conductive subsurface materials. It has an increasing number of …

Interactions between groundwater (GW) and surface water (SW) have important implications
for water quantity, water quality, and ecological health. The subsurface region proximal to …

Natural electric currents running through marine sediments have recently been found to
couple oxygen reduction at the surface to sulfide oxidation in deeper anoxic layers. Here we …

The biodegradation of organic pollutants in aquifers is often restricted to the fringes of
contaminant plumes where steep countergradients of electron donors and acceptors are …

Recently, long filamentous bacteria have been reported conducting electrons over
centimetre distances in marine sediments. These so-called cable bacteria perform an …

Hexavalent uranium (UVI) can be reduced enzymatically by various microbes and abiotically
by Fe2+-bearing minerals, including magnetite, of interest because of its formation from …