Fig. 1From: Leaf functional traits differentiation in relation to covering materials of urban tree pitsChanges in plant functional traits under different covering materials. A Leaf thickness, B Relative chlorophyll content, C Leaf dry matter content, D Leaf tissue density, E Specific leaf area, F Stomatal density, G Stomatal area. No cover (CK), turf (T1), permeable plastic blanket (T2), tree grate (T3), wood board (T4), cement (T5). “*” indicates that the significant level between treatments is at the p < 0.05 level, and “**” indicates that the significant level is reached between the treatments at p < 0.01. Same below.Back to article page