Vegetation-environment relationships among woody species in four canopy-layers in an old-growth mixed mesophytic forest
We examined vegetation-environment relationships among woody species in four canopy-strata within an old-growth mixed mesophytic forest. We hypothesized that 1) the most important environmental variables determining vegetation composition would differ among canopy-layers and 2) the maximum abundance of Quercus spp. would occur under different environmental conditions than those of Acer spp. Overstory and mid-story vegetation were arrayed along gradients of soil fertility and elevation. The shrub- layer and the ground-layer were most strongly correlated with soil fertility and pH. Across strata, Quercus spp. were consistently located in ordination space on well-lit upper slopes with low soil pH. Acer rubrum was found across a wide array of environmental conditions and Acer saccharum was found in mesic areas.
McEwan, R. W., R. N. Muller, and B. C. McCarthy. 2005a. Vegetation-environment relationships among woody species in four canopy-layers in an old-growth mixed mesophytic forest. Castanea 70:32-46.