Denitrifying bacteria require copper for the synthesis of nitrous oxide reductase. In the absence of sufficient bioavailable Cu, nitrous oxide (N 2 O) may accumulate in natural waters during denitrification. Cultures of Paracoccus denitrificans and natural bacterial assemblages collected from a mesotrophic lake (Linsley Pond) were grown at varying Cu concentrations to determine the Cu speciation that results in elevated N 2 O...

The spatiotemporal chemical characteristics of the water column in Linsley Pond, a freshwater lake in Connecticut, were studied from just before its stratification in April through the fall turnover in December. Two low‐molecular‐weight thiols, glutathione and 3‐mercaptopropionic acid (MPA), were detected at nanomolar concentrations in the water column. GSH was detected (average concentrations were ca. 5 nmol L −1 in the parti...

A mass balance was constructed quantifying all known sources and sinks for the metals Ag, Cd, Cu, and Pb in New Haven Harbor, Connecticut, USA. Sources included direct atmospheric deposition, rivers, treated sewage effluent, combined sewer overflows, and permitted industrial discharge. Sinks were burial in sediments, tidal exchange with Long Island Sound, removal in salt marshes, and dredging. All of these fluxes were measured...