Journal archives for June 2017

June 03, 2017

The Current Summary of Q. garryana on the Washington and Oregon East Cascade Slopes.

The current observation set was mapped against the Little Atlas Quercus garryana mapped range. The data set demonstrates the range is much more extensive than the mapped boundaries. Considerable oak is present in Klickitat County Washington east of Goldendale, Washington and in Wasco County Oregon in the area around Tygh Valley. The boundaries of the Omernik level III & IV EcoRegions have been found to be useful in describing the species range on the east slope. Currently, I am looking at the local soil types as an tool in identifying the local range. This is promising. In Washington the Gunn soil mappes the dominate oak woodlands. In Oregon the Skyline and Wamic soils define the occurrence of oak woodlands.

Posted on June 03, 2017 07:40 by carexobnupta carexobnupta | 0 comments | Leave a comment

June 28, 2017

Resources for the Quercus garryana Range

General mapping of the Q. garryana range is published in two documents, Little 1971 and Burns & Honkala 1990. Species specific digital ranges (ArcMap Shapefiles) are available for the Little Atlas. The Agriculture Handbook 654 is available in PDF format.

The Agriculture Handbook 654 maps oak to the eastern edge of Klickitat County, Washington but does not include the East Cascade oak forest in south Wasco County. The Little Atlas does include the Wasco County distributions but not the Klickitat County distribution.

Russell M. Burns and Barbara H. Honkala, Technical Coordinators, Timber Management Research;
Silvics of Forest Trees of the United States, Agriculture Handbook 654, Forest Service, United States Department of Agriculture, Washington, DC;
December 1990;
Library of Congress Catalog Card Number: 86-60058.

Little, E.L., Jr., 1971, Atlas of United States trees, volume 1, conifers and important hardwoods: U.S. Department of Agriculture Miscellaneous Publication 1146.

Buechling A, Alverson ER, Kertis J, Fitzpatrick G, Classification of Oak Vegetation in the Willamette Valley, Oregon Natural Heritage Information Center, Oregon State University, 03/2008,

Posted on June 28, 2017 06:48 by carexobnupta carexobnupta | 0 comments | Leave a comment