Extended Data Fig. 5: Correlation between height SD (left) and gap edge length (right) and the proportion of conifers in a forest stand.
From: Heterogeneity–diversity relationships differ between and within trophic levels in temperate forests
Height SD decreased with increasing proportion of coniferous trees but the correlation was relatively weak (F1,495=39.64, t-value = −6.29***, R²=0.07). Horizontal heterogeneity increased with increasing proportion of coniferous trees (F1,495=131.2, t-value = 11.45***, R²=0.21). However, this is likely due to the fact that in the Bavarian Forest, many spruce stands at higher elevations have been infected by bark beetles, which lead to many gaps. Colour-coding referring to the five regions: the Biosphere Reserve Schwäbische Alb (ALB), Hainich National Park and the surrounding area (HAI), the Schorfheide-Chorin Biosphere Reserve (SCH), the Steigerwald project (STE) and the BIOKLIM project in the Bavarian Forest National Park (BAY).
