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Use of airborne lidar data to improve plant species richness and diversity monitoring in lowland and mountain forests

Table 3

Description and summary of forest structure variables derived from ALS data.

With zi corresponding to the aboveground height of an ALS point i, n to the total number of ALS points, and N to the total number of 1 m2 grid cells in the plot. Variables were extracted from circular plots with the same radius as the field plots (9 m at the Lowland site (L) and 15 m at the Mountain site (M) respectively). Vegetation points inferior to 2 m were considered to belong to the understory and were not taken into account as tree vegetation points when computing the following variables: Hmean, , Gini, CvLAD, Gapmax, Cf, Cr.

Table 3