We are assessing the landscape-level spatial and temporal patterns of ash (Fraxinus spp.) decline and mortality due to emerald ash borer (Agrilus planipennis) (EAB) in southeastern Michigan. During the summers of 2004-2007, thirty one stands were monitored for ash dieback using a 1-5 rating scale with 1 as an alive and 5 being a dead tree. These forest stands include black (F. nigra), green (F. pennsylvanica), and white (F. Americana) ash present on hydric, mesic, and xeric sites, respectively, and representing a decreasing tree mortality gradient from the epicenter of EAB infestation in Canton, Michigan. A significant negative relationship was detected between percent ash tree mortality and distance from the epicenter of infestation (~2% increase in mortality/km). A comparison of ash tree mortality between plots that were sampled in 2004 and 2006, and in 2005 and 2006 indicated that mortality increased by 19-23% over 1-2 years. We will be using survivorship curves to further model ash tree progression over time, and to correlate these changes with specific tree attributes (DBH, height, age, and growth increments). At present, our results indicate that as EAB continues to spread it is causing large-scale decimation of three major ash species in central hardwood forests.