The Western North American Naturalist is currently offering their memoirs and monographs to anyone in the United States, free of charge (cost of shipping for international). We believe that you might be interested in the following:
GBN Memoirs #6. The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae), a taxonomic monograph (1982)
This monograph describes biological activities, ecological role, biogeography, and classification of bark and ambrosia beetles. It contains drawings and some photographs for species identification; 1359 pages.
GBN Memoirs #10. A reclassification of the genera of Scolytidae (Coleoptera) (1986)
This text reclassifies tribes within the subfamilies Hylesininae and Scolytinae, with photos and drawings to aid identification; 126 pages.
GBN Memoirs #11. A catalog of Scolytidae and Platypodidae (Coleoptera), part 1: bibliography (1987) Companion to #13; 685 pages.
GBN Memoirs #13. A catalog of Scolytidae and Platypodidae (Coleoptera), part 2: taxonomic index (2 volumes) (1992) Companion to #11; 1552 pages.
To view the complete list of memoirs, go to http://wnan.byu.edu/publications.asp
If you are interested, please email Emmaleigh Litchfield at wnan(a)byu.edu<mailto:firstname.lastname@example.org> with the number of copies and a shipping address.
Emmaleigh Litchfield, Editorial Assistant
Western North American Naturalist
Mark C. Belk, Editor
190 Monte L. Bean Museum
Brigham Young University Provo, UT 84602
Telephone: (801) 422-6688
Fax: (801) 422-0093
Can you please post this on FORENT? Thanks!
Position announcement - PhD student needed to start spring semester (January 2010) to work on climate change effects on fungal symbionts associated with mountain pine beetle. Background working with fungi required, entomological experience a definite bonus. For additional information contact Diana L. Six, College of Forestry and Conservation, University of Montana, Missoula, MT Diana.six(a)cfc.umt.edu<mailto:Diana.email@example.com>
Diana L. Six
Interim Associate Dean of Graduate Programs
Professor of Forest Entomology and Pathology
Department of Ecosystem Sciences
College of Forestry and Conservation
University of Montana
Missoula, MT 59812
Any idea what would cause dark rings in red oak logs as in the attached pictures?
The dark rings run the length of the logs. So far this has been seen on a number of sites in 3 or 4 counties in Minnesota. Not all red oak trees on a site have the dark rings.
My first guess is that it is a barrier zone resulting from a wound or injury of some type. However it seems strange that it forms a complete cylinder that reaches the ends of the logs. I didn't see any logs where the dark ring only went part way around a log. Also there were some logs that had obvious injuries with decay and discoloration but these logs did not form rings or even have distinct barrier zones going even part way around the log.
I've only looked at logs like this while in the mill, not on the site where they were harvested. At first, the thought was that these rings were the result of something happening 16 to 17 years ago. This will take more investigation, but it looks to me like the time period varies anywhere from 6 to 35 years. Also at this time I can't say if the time period varies ibetween sites, or if the time period varies from log to log on the same site.
Any suggestions would be appreciated.
Forest Health Specialist
1201 E. Hwy. # 2
Grand Rapids, MN 55744