Table 2.

Total species richness predicted from GAM with year as the only explanatory variable at each region (gamma diversity) in the first and last years of data, at minimum common annual number of trawls (%DV = %Deviance explained)

Region	First year of data	Richness first year [95% CI]	Last year of data	Richness last year [95% CI]	% increase [95% CI]	Annual trawls	% DV
Norwegian & Barents Sea	1994	66 [61, 71]	2020	96 [91, 101]	45 [29, 65]	361	83
Svalbard	1996	33 [29, 37]	2020	48 [44, 52]	45 [20, 77]	30	69
North Sea	1998	40 [37, 42]	2020	58 [51, 57]	47 [32, 65]	37	81