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"Getting the full picture: assessing the complementarity of citizen science and agency monitoring data"
figure
posted on 2017-05-29, 23:07 authored by Jeneen Hadj-HammouJeneen Hadj-Hammou, Steven LoiselleSteven Loiselle, Daniel Ophof, Ian ThornhillFig 1. Thames catchment fitted with 5km hexagonal grid.
Fig 2. Thames basin divided into a 5km hexagon grids. The grid cells are coloured according to the number of seasons (0= blue to all 4= red) represented by nitrate samples shown as black dots collected by a) the EA and b) the FWW between spring 2013 and winter 2015.
Fig 3. Overlap in grid cells sampled by the EA and FWW, where complete overlap (red) represents grid cells where both EA and FWW samples are represented by all the seasons, partial overlap (yellow) represents grid cells where EA and FWW are represented by samples collected in some of the same seasons, and no overlap (blue) represents grid cells where none of the same seasons are represented by the two datasets. Grid-cells where spatiotemporal gaps are filled by FWW samples (areas where FWW citizen scientists collected samples for all the seasons, but the EA did not) are represented by a black outline. The time period investigated is between spring 2013 and winter 2015.
Fig 4. The percentage of still-water sites (ponds, lakes, wetlands) sampled by the Environment Agency (EA) (N=25) and Freshwater Watch (FWW) (N=156) citizen scientists with areas less than 8 ha and greater than 8 ha. EA sites are represented by a light grey colour and FWW sites are represented by a dark grey colour.
Fig 5. Stacked bar-chart showing the percentage of EA running water sites (N=666) and FWW running water sites (N=714) within each stream-order. EA sites are represented by a light grey colour and FWW sites are represented by a dark grey colour.
Fig 6. Stacked bar-chart showing the percentage of sites (still-water and running-water) with an average nitrate value within each nitrate category, where N=2 for EA still-water sites with nitrate samples, N=613 for EA running-water sites with nitrate samples, N=156 for FWW still-water sites with nitrate samples, and N=714 for FWW running-water sites with nitrate samples. EA sites are represented by a light grey colour and FWW sites are represented by a dark grey colour.
