Vegetation Classification and Mapping Project Report - USGS

USGS-NPS Vegetation Mapping Program
Colonial National Historical Park
Axis 3
FRSP.10
PETE.7
APCO.7
APCO.12
COLO.20
Fe
COLO.19
RICH.10
COLO.21
COLO.22
FRSP.25
pH Ca
Mg
Mn
Axis 1
RICH.4
FRSP.24
COLO.2
Group
CEGL006075
CEGL006919
Figure G7. Joint plot showing significant correlations (r 2 = 0.20) of 19 soil variables with
ordination scores for 87 mesic acidic forest plots on Axis 1 and Axis 3 of the NMDS ordination.
The angles and lengths of the radiating lines indicate the direction and strength of the
relationship. Environmental variables used in joint plots are listed in Table 5. Only the 87 plots
in this group with complete soil chemistry data were included in the ordination. Plots from the
seven Virginia national parks are labeled to the right of or below the symbol.
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