Hydrological and biogeochemical controls governing the speciation and accumulation of selenium in a wetland influenced by mine drainage.

Controls governing the speciation and accumulation of Se in a 3.7-ha marsh influenced by mine drainage were assessed through examination of water balance, water quality, sediment, and plant tissue components. Over the 8-mo study period (April through November, 2009), mean monthly flows ranged from 1600 to 2300 m  d (hydraulic retention time of 1-3 d).

Shifts in air temperature and high-magnitude winter precipitation events in coastal North America: Implications for Environmental Assessment and Management.

This commentary examines recent shifts in air temperature data coinciding with high-magnitude precipitation events at climate stations spanning an elevational and longitudinal gradient on the south coast of British Columbia, Canada. Results presented show that high-magnitude winter precipitation events are occurring on British Columbia's south coast under progressively warmer conditions. In the future, proportionally more winter precipitation is anticipated to report as rainfall versus snow, and over time these changes will have a marked impact on the snowmelt-dominated hydrographs that characterize local watersheds.