BMP - Tree Inventories - 19

A species frequency profile can be created from the data to help managers
analyze such issues as planting for species diversity, determining susceptibility to pests, and projecting maintenance needs.
*	 Some exception must be made for trees that are routinely identified
only to the genus level because of hybridization or other biological
mechanisms that make species identification difficult or pointless
(e.g., Malus or Crataegus).
*	 Cultivar information is rarely collected for existing trees because field
identification is difficult. Generic cultivar traits (e.g, columnar, dwarf,
etc.) could be used. For certain management goals-for example, to
test survival and performance of recently released elms or to select for
crown radius or flower color-it might be desirable to enter cultivar
information from the vendor at planting time. The database will need
to include a field for such attributes.
*	 For greater economy, available planting sites can be recorded as an
entry in the " species " attribute field that indicates the largest acceptable mature tree size (e.g., " planting site small " ).
*	 Sufficient values for unidentified species (e.g., " Unknown 1, "
" Unknown 2 " ) must be available to accommodate all data collectors. At
some point, unknown trees should be identified and the data corrected.

Figure 8. Example of inventory output. The dominant species
are displayed in a pie chart, helping urban forest managers
attain diversity in future planting decisions.

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BMP - Tree Inventories

Table of Contents for the Digital Edition of BMP - Tree Inventories
