Figure 3
From: Marine heatwaves and the collapse of marginal North Atlantic kelp forests

Marine heatwaves and declines in sugar kelp in southern Norway (a) and the eastern USA (b) in 2018. Horizontal bars show MHWs with colours indicating maximum severity (see Fig. 2a,b). Error bars are SDs around mean kelp cover (A) and kelp density (B). Some error bars are within the diameter of the symbol. Details on kelp sites are reported in Supplementary Table S1.