Significant spatiotemporal pattern of nitrous oxide emission and its influencing factors from a shallow eutropic lake in Inner Mongolia, China.

Eutrophic shallow lakes are generally considered as a contributor to the emission of nitrous oxide (NO), while regional and global estimates have remained imprecise. This due to a lack of data and insufficient understanding of the multiple contributing factors. This study characterized the spatiotemporal variability in NO concentrations and NO diffusive fluxes and the contributing factors in Lake Wuliangsuhai, a typical shallow eutrophic and seasonally frozen lake in Inner Mongolia with cold and arid climate.

Characterization of nitrogen and phosphorus at the ice-water-sediment interface and the effect of their migration on overlying water quality in Daihai Lake (China) during the freezing period.

Approximately one-third of the year, Daihai Lake experiences freezing conditions. During this period, the primary mechanisms that impact the quality of the lake water quality include the freezing of nutrients by the ice sheet and the migration of nutrients between the ice, water, and sediment. The present investigation involved the collection of samples of ice, water, and sediment, followed by the utilization of the thin film gradient diffusion (DGT) technique to and explore the distribution and migration of diverse nitrogen (N) and phosphorus (P) forms at the interface of ice, water and sediment.

Invertebrates are declining in boreal aquatic habitat: The effect of brownification?

Surface water browning affects boreal lakes in the Northern Hemisphere. This process is expected to increase with global warming. Boreal lakes are the most numerous lakes on Earth.

High Nitrogen Removal in a Constructed Wetland Receiving Treated Wastewater in a Cold Climate.

Constructed wetlands provide cost-efficient nutrient removal, with minimal input of human labor and energy, and their number is globally increasing. However, in northern latitudes, wetlands are rarely utilized, because their nutrient removal efficiency has been questioned due to the cold climate. Here, we studied nutrient retention and nitrogen removal in a boreal constructed wetland (4-ha) receiving treated nitrogen-rich wastewater.