Figure 1
From: Marine heatwaves and the collapse of marginal North Atlantic kelp forests
Historic kelp cover (blue bars) and occurrence of MHWs (points) that equaled or exceeded temperature thresholds for mortality of S. latissima in southern Norway (19.7 °C) (a) and the eastern USA (22.8 °C) (b). Colours indicate the category of MHW severity (based on size of °C anomaly relative to the climatological mean). Trendlines are fitted using a linear model (gray) with 95% confidence interval. Black line is quantile regression showing change in the 90th quantile of the predictor variable. Temperature data are from subsurface loggers. Kelp cover data and errors are reported in Supplementary Table S2.
