Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Carl W. Ramm"'
Autor:
Mary T. Bremigan, Carl W. Ramm, Steven W. Hewett, Michael J. Hansen, Nancy A. Nate, Michael A. Bozek
Publikováno v:
North American Journal of Fisheries Management. 23:1207-1214
We developed a linear discriminant function (LDF) using surface area, mean depth, fetch, and three substrate descriptors to discriminate the presence and absence of walleyes Sander vitreus (formerly Stizostedion vitreum) in 120 northern Wisconsin lak
Autor:
Brian E. Potter, Carl W. Ramm, Leah S. Bauer, C.N Koller, Jeffrey A. Andresen, David P. Lusch, Deborah G. McCullough
Publikováno v:
Agricultural and Forest Meteorology. 110:85-100
Accurate prediction of winter survival of gypsy moth (Lymantria dispar L.) eggs and phenology of egg hatch in spring are strongly dependent on temperature and are critical aspects of gypsy moth management programs. We monitored internal temperatures
Autor:
Carl W. Ramm, Seal J. Canavan
Publikováno v:
Northern Journal of Applied Forestry. 17:62-70
This study is a followup to the 5 yr validation of the Lake States TWIGS (The Woodsman's Ideal Growth Projection System) projection system by Guertin and Ramm (1996). Accuracy and precision of 10 yr diameter growth, basal area growth and mortality pr
Publikováno v:
Environmental Entomology. 28:485-495
We evaluated 3 egg mass survey methods used to predict gypsy moth, Lymantria dispar (L.), defoliation in 32 oak stands in northwestern lower Michigan. Fixed-radius plots, timed walks, and a recently developed method, the 100-tree plot, were used to a
Autor:
Carl W. Ramm, Patrick J. Guertin
Publikováno v:
Northern Journal of Applied Forestry. 13:182-188
Five-year diameter growth, basal area growth, and mortality for five upland hardwood species in northern Lower Michigan were compared to projections from Lake States TWIGS. The species studied were northern red oak, white oak, other red oak (pin oak
Autor:
William H. E. Day, Rudolf Mathar, Ove Frank, R. W. Payne, Chris Glasbey, Carl W. Ramm, David Banks, Pascale Rousseau, Erhard Godehardt
Publikováno v:
Journal of Classification. 13:337-362
Publikováno v:
Preventive Veterinary Medicine. 25:37-49
To examine the relationships among liver element concentrations, principal component analysis (PCA) was performed on data from a case series of 54 common loons collected in Michigan during the period from July 1988 to February 1993. Data available fo
Autor:
K. Potter Witter, Carl W. Ramm
Publikováno v:
Northern Journal of Applied Forestry. 9:10-14
Michigan's aspen resource has come under increased pressure in the last decade. USDA Forest Service survey and output data and Michigan Department of Natural Resources stumpage price and industry data were compiled and analyzed to determine the curre
Publikováno v:
Canadian Journal of Forest Research. 21:1596-1600
Principal component analysis of white oak (Quercusalba L.) and black oak (Quercusnigra L.) revealed different stem profiles across four ecological land units in the Lower Peninsula of Michigan. Multivariate linear regression and geometric models were
Publikováno v:
Canadian Journal of Forest Research. 21:1573-1580
In large-scale gradient studies, selection of the best research sites is critical but time-consuming and costly. Multivariate methods can be used to quickly identify suitable sites from existing data bases. Based on a study of acid deposition in the