Coastal waterways can be significant sources of the potent greenhouse gas nitrous oxide (N 2 O) due to nitrogen inputs and eutrophication. Here, we quantify groundwater derived N 2 O inputs and atmospheric emissions within a modified urban embayment (Sydney Harbour, Australia). Overall, we found low N 2 O saturation (91–171%) and air–water fluxes (−2.2 to 24.6 μ mol m −2 d −1 ). Concentrations were highest in upstream brackish...

Developed for carrying out risk assessments under the European Commission ( EC ) Council Regulation No 708/2007 concerning the use of alien and locally absent species in aquaculture ( ASR ), the European Non‐native Species in Aquaculture Risk Assessment Scheme ( ENSARS ) is briefly summarised, and the ‘Organism’ module is applied to the 24 species listed in ASR 's Annex IV . Four other ENSARS modules (Infectious Agent, Facilit...

The effect of Anguillicola crassus , Pseudodactylogyrus bini and Pseudodactylogyrus anguillae infection on the behaviour of downstream migrating adult European eels Anguilla anguilla as they encountered accelerating water velocity, common at engineered structures where flow is constricted ( e.g . weirs and bypass systems), was evaluated in an experimental flume. The probability of reacting to, and rejecting, the velocity gradi...