Spatio-Temporal Changes Of Species Composition And Structure Of Remnant Forest Patches Within An Urbanizing Landscape (presentation)

ZIPPERER, WAYNE C., Rachel Hershey-Riemann, and Mike Hoppus

In 1949, USDA Forest Service initiated an inventory and assessment of Maryland's forest resources. Since that date, three other inventories have been conducted-1961, 1976, and 1985-and a fifth is being planned for 1999-2000. The inventory consists of measuring overstory, understory, shrub, and herbaceous cover through different plot configurations. Because of changes in the inventorying procedure, not all plots sampled in a year were resurveyed in succeeding years. We propose a five-phase process to evaluate how these inventory plots have changed and if this change is associated with urbanization patterns.

The Baltimore metropolitan region-Harford, Carroll, Baltimore, Howard, and Anne Rundel counties-serves as the study region. The first phase of the project determines how many plots have been continuously inventoried for each sampling date. The second phase involves reinventorying those plots not being inventoried in the 1999-2000 assessment. The third phase ordinates plots by environmental factors and examines changes in species composition and structure. The final phase involves conducting a spatio-temporal analysis from 1949 to 1999 of urbanization patterns and configuration of patches containing inventory plots. An association analyses will examine the relationship between species and urbanization patterns.