Comparison of macrofaunal (light blue) and megafaunal (dark blue) abundance and taxa richness between shelf and slope stations and sampling years.

<p>Mean total abundance (left panel) and mean taxa richness (right panel). Stations grouped by shelf and slope (top panel) and stations grouped by year on shelf or slope (bottom panels). Bars represent 95% confidence intervals. Sample size (N) is denoted by number on bar. Sample area of macrofauna: 0.125 m² and megafauna: 450 m</p

Sampling stations and ice coverage on the Beaufort shelf and slope from 2009 to 2011.

<p>One box core and trawl sample were collected from each station (left panel). Sample sizes were n = 18 in 2009, n = 18 in 2010 and n = 12 in 2011. Black dotted line outlines the spatial extent of sampling used to calculate the average slope. Ice coverage (white area, right panel) for 2009, 2010 and 2011 benthic sampling periods. Blue coverage area outlines the area over which ice coverage was calculated. Blue lines in plots represent historic ice coverage (median from 1981 to 2010). Green bars indicate when benthic sampling occurred. Ice coverage data courtesy of Canadian Ice Service, Environment Canada.</p

Relative abundance and depth ranges of dominant taxa.

<p>Average relative abundance of dominant taxa by cluster (left). Dominant taxa ordered by their contribution to average relative abundance in clusters A, B, C and D, are highlighted by cluster to illustrate the relative contribution of taxa to each cluster. Colours represent faunal clusters defined in dendrograms (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101556#pone-0101556-g008" target="_blank">Figure 8</a>). Depth range of corresponding taxa (right); grey circles denote mean depth of samples where taxa were present.</p

Relationships of total macro- and megafaunal abundance with depth.

<p>Abundance in number of individuals per sample. Sample area of macrofauna: 0.125 m² and megafauna: 450 m Spearman's rank correlation coefficient denoted by </p

Analysis of variance of macro- and megafaunal abundance and taxa richness with year and depth.

<p>Categorical variables: depth  =  shelf/slope and year  =  2009/2010/2011. Abundance was log transformed to normalize residuals. Significance codes: </p

Individual-based rarefaction curves for 2009 and 2010 megafaunal datasets.

<p>(A) non-normalized counts and (B) counts normalized to the average trawl area. Curves represent the average of 900 resampling permutations.</p

Map of Beaufort sampling region with georeferenced clusters.

<p>Colours represent macro- and megafaunal clusters defined in dendrograms (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101556#pone-0101556-g008" target="_blank">Figure 8</a>).</p

Distribution of occurrence.

<p>(A) Distribution of occurrence as percent of sites occupied (binned intervals starting with 1-10%) and (B) mean relative abundance (%) by percent of sites occupied. Relative abundance, a measure of local abundance, was averaged only across sites where taxa were present. Vertical grey line represents rarity cut-off at 10% and horizontal grey line denotes the median average relative abundance. Spearman's rank correlation coefficient denoted by </p

students_data

Contains all the data acquired by the group of students. Details of the columns are as follows: UserID: unique ID attributed to each observer in the Ocean Networks Canada digital infrastructure database. Date: Date of video acquisition Time: Time of video acquisition Counts: Number of sablefish in the video MatchDateTime: Date and Time used to match the counts among the different group

algorithm_data

Contains all the data acquired using the computer vision algorithm. Details of the columns are as follows: Video: Name of the video in the Ocean Networks Canada digital infrastructure database. Date: Date of video acquisition Time: Time of video acquisition Counts: Number of sablefish in the video MatchDateTime: Date and Time used to match the counts among the different group