Bioaccumulation of environmental toxicants in aquatic ecosystems presents a significant ecological challenge including potential implications for fish reproduction and population dynamics. Through this meta‐analysis, we investigated how elevated mercury (Hg) and polychlorinated biphenyls (PCBs)—two prevalent and problematic contaminants—in large, and presumably old fish, affect toxicant concentrations in their eggs and subsequ...

Nitrification is an essential process within the global nitrogen cycle and also occurs under extreme conditions, such as in geothermal environments. The nitrite‐oxidizing group Nitrospira represents key nitrifiers in these systems, as several species inhabit hot springs worldwide. Using different initial incubation temperatures, two novel moderately thermophilic Nitrospira enrichments, Nitrospira sp. Vd2 and Ca . N. neuquenens...