Extended Data Fig. 4: Modelled total tree density and tree cover across elevation gradients.
From: Overlooked and extensive ghost forest formation across the US Atlantic coast
Tree density data from the USFS tree density map in 2012, which was modeled using the Forest Inventory and Analysis (FIA) field plots and gridded environmental data79. Tree cover data from the Hansen tree cover map in 2000 was derived from Landsat63. It is important to note that these datasets are not directly comparable with our product due to differences in methodology and input data source. Instead, these datasets are used as a reference to assess how tree cover or total tree count changes with elevation. We found that tree cover remains stable across elevations, and although the total tree density slowly increases with decreasing elevation, it cannot explain the drastic increase in tree mortality density below 5 m in this study.
