Fig. 2From: A meta-analysis shows that seaweeds surpass plants, setting life-on-Earth’s limit for biomass packingThe biomass and density of seaweeds and plants on Earth. The plant interspecific boundary line (plant IBL) was postulated by Weller [20] and Scrosati [21]. The seaweed’s IBL was estimated by model I (QR1) and model II (QR2) quantile regression on all the algal data (all) or to the selected algal data (top). Observations selected (1) or not selected (0)Back to article page