Costs total information:
The initial sum was used to restore the river channel and related wetlands, as well to establish
Information on Ecosystem improved biodiversity:
These wetlands were constructed by excavation in abandoned crop fields. Vegetation was allowed to selfestablish. Seven vegetation zones were identified at the Gateway wetland: natural flood meadow by the lake, constructed islands, constructed wetland area, two dryer wet meadow areas, area of Salix shrubs, and adjacent forest edge. Annual monitoring for species and foliar coverage in summers of 2010, 2011 and 2012 (94 area 0.5m2 plots) revealed that the vegetation selfestablishment at the Gateway wetland was rapid, rich in taxa, and dominated by native wetland species. Only two alien species were identified: Elodea canadensis in deep water areas and Epilobium adenocaulon in dryer meadow areas. Coverage exceeded 90% in 2012.
Ecosystem impact climate regulation:
Impact on GHGs (net emissions and storage) including soil carbon
Information on Ecosystem impact climate regulation:
GHGs have been continuously monitored at the Gateway wetland by the eddy covariance method from air (measures fluxes) and directly from water (measures concentrations).
Measurements of GHG concentration in water during winter 2012-2013 indicate that the site has been a source of CO2 and CH4 into the atmosphere. However, ice cover has prevented 4
GHG emissions. The GHG concentrations in the water were sensitive to changes in flow rates. Polluted spills within the urbanized areas impacted water quality as well as GHGs released from the water at the wetland.
Ecosystem erosion control: