Moss and Soil Substrates Interact with Moisture Level to Influence Germination by Three Wetland Tree Species

Figure 1

Mean + s.d. % germination for each of three wetland tree species (Acer x freemanii, Fraxinus pennsylvanica, Ulmus americana) under three hydrological regimes (wet, moist, dry) and three substrates (Hypnum imponens, Thuidium delicatulum, bare soil) in the greenhouse (𝑛=8 for each treatment combination). Seedlings were counted 17 days after seeding for Acer, and 49 days after seeding for Fraxinus and Ulmus. See Table 1 for statistical results. Bars with the same letter are not significantly different by Tukey’s post-hoc test at 𝑃≤0.5. Note that the vertical axis scale changes on each graph.

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