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Domain Inventory Project
23 March 2005
Domain Compartments
Points sampled, 1996-2001
Data collection A total of 1786 points (“plots”) were sampled Data collected on 1/20 acre included
Tree species Diameter at breast height (dbh) Canopy class (dominating, <50%, not present, etc.) Height at which dbh = 8” and dbh = 4” Number of vines and/or cavities Snag class Basal area
Excel example
What to do with the data? Explore plateau vs. cove differences Quantify amount of timber that could be
harvested by compartment Look at species richness
Differences between Plateau and Cove Plateau
Soils primarily derived from sandstone
Relatively water-restricted
pH relatively acidic Few nutrients High light
Cove Soils derived from
shale and limestone Damper than Plateau pH buffered by shale
& limestone, so less acidic
More nutrients Low light
Red Maple Acer rubrum
Sugar Maple Acer saccharum
Mean basal area
Tree richness
ProcessesForestry
Computer Science Biology
Attribute table matching
Completed Queries Density by species by Cclass
For each species, count the number of records for each Cclass 1 through 4 per Plot
Density by species Count number of records by species per plot
Density by Cclass Count number of records by Cclass per plot
Species richness Count number of unique species per plot
Basal area per plot Sum basal area per plot
Queries to be Completed Species richness by compartment Cclass by species by compartment Diversity by compartment Mean snag density by compartment Mean # of cavities per compartment
Shannon-Weiner Diversity Index -Σpi ln pi
-Σpi ln pi = 1.269
Species # of individuals p ln p p ln pA 50 0.5 -0.693147181 -0.34657359B 25 0.25 -1.386294361 -0.34657359C 15 0.15 -1.897119985 -0.284567998D 7 0.07 -2.659260037 -0.186148203E 3 0.03 -3.506557897 -0.105196737
-1.269060118