The purpose of this review is to better understand the full life cycle and influence of ammonia
from an aquatic biology perspective. While ammonia has toxic properties in water and air, it …

An understanding of the transport and survival of microbial pathogens (pathogens hereafter)
in agricultural settings is needed to assess the risk of pathogen contamination to water and …

1. The first part of this review focuses on the oxygen status of natural groundwater systems
(mainly porous aquifers) and hyporheic zones of streams. The second part examines the …

Atomic hydrogen (H*) and hydroxyl radicals (• OH) can synergistically realize efficient
mineralization of halogenated organic pollutants, but it requires an electrocatalytic or …

A relatively narrow vertical zone (5–6 m thick) of NO 3− containing groundwater was
identified using multilevel sampling devices in a sand and gravel aquifer on Cape Cod, MA …

To investigate the distribution of microbial biomass and activities to gain insights into the
physical controls on microbial activity and potential long‐term survival in the subsurface, 24 …

Most ecosystems on Earth exist in permanent darkness, one or more steps removed from the
light-driven surface world. This collection of dark habitats is the most poorly understood on …

Microbial degradation is the only sustainable component of natural attenuation in
contaminated groundwater environments, yet its controls, especially in anaerobic aquifers …

Abstract Excess nitrate (NO3-) in lakes and streams has deleterious effects for
environmental and human health. Nitrate concentrations have become problematic in …

The effect of physical variability upon the relative transport behavior of microbial‐sized
microspheres, indigenous bacteria, and bromide was examined in field and flow‐through …