Fig. 3
Spatio-temporal flagging methods illustrated with the EVHOE survey sampling the Celtic Sea and Bay of Biscay continental shelf and slope. Conceptual diagrams illustrate the general method applied to each survey unit (i.e., a combination of survey and seasons and/or quarter) for the first flagging method at coarser (a) and finer (b) spatial resolutions and for the second flagging method from BioTIME (c). The ordination and flagging results are illustrated on the sampling effort time-series for the EVHOE SBTS for each method (d–f). The lines in the plots (d,e) separate the well-sampled grid cells and years (in the top-right corner) from the grid cells (below the horizontal line) and year (to the left of the vertical line) flagged for potential removal. Lines are plotted according to the 0% and 2% thresholds (blue and green, respectively). Maps display the location of flagged hauls for the EVHOE survey according to the two flagging methods, spatial resolutions, and thresholds when applicable (g–i).
