Index Catalog // ScholarsArchive@OSU

High diversity and widespread occurrence of mitotic spore mats in ectomycorrhizal Pezizales

Creator:: Healy, R. A., Smith, M. E., Bonito, G. M., Pfister, D. H., Ge, Z-W., Guevara, G. G., Williams, G., Stafford, K., Kumar, L., Lee, T., Hobart, C., Trappe, J., Vilgalys, R., and McLaughlin, D. J.
Abstract:: Fungal mitospores may function as dispersal units and/ or spermatia, and thus play a role in distribution and/or mating of species that produce them. Mitospore production in ectomycorrhizal (EcM) Pezizales is rarely reported, but here we document mitospore production by a high diversity of EcM Pezizales on three continents, in...
Resource Type:: Article
Full Text:: Biology Ge, Zai-Wei; Chinese Academy of Sciences, Kunming Institute of Botany Vilgalys, Rytas; Duke

Asymmetrical effects of mesophyll conductance on fundamental photosynthetic parameters and their relationships estimated from leaf gas exchange measurements

Creator:: Sun, Ying, Gu, Lianhong, Dickinson, Robert E., Pallardy, Stephen G., Baker, John, Cao, Yonghui, Murilo DaMatta, Fábio, Dong, Xuejun, Ellsworth, David, Van Goethem, Davina, Jensen, Anna M., Law, Beverly E., Loos, Rodolfo, Vitor Martins, Samuel C., Norby, Richard J., Warren, Jeffrey, Weston, David, and Winter, Klaus
Abstract:: Worldwide measurements of nearly 130C3 species covering all major plant functional types are analysed in conjunction with model simulations to determine the effects of mesophyll conductance (gm) on photosynthetic parameters and their relationships estimated from A/Ci curves. We find that an assumption of infinite gm results in up to 75%...
Resource Type:: Article

Evaluation of nonspatial approaches and equation forms used to predict tree crown recession

Creator:: Hann, David W. and Hanus, Mark L.
Abstract:: Two nonspatial approaches for modeling tree crown recession (ΔHCB) were evaluated by using 5341 observations from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). The first approach applies a static height-to-crown-base (HCB) equation at the start and end of the growth period and uses the difference in these predictions as an estimate of...
Resource Type:: Article
Full Text:: predict tree crown recession David W. Hann and Mark L. Hanus Abstract: Two nonspatial approaches for

Predicting height to crown base for undamaged and damaged trees in southwest Oregon

Creator:: Hanus, Mark L., Hann, David W., Marshall, David D., and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting height to crown base are presented for tree species from southwest Oregon. Equations for undamaged and damaged trees were estimated with weighted nonlinear regression techniques. The effects of specific damaging agents on the height to crown base were explored, and damage correction factors were estimated. The damage...
Resource Type:: Technical Report
Full Text:: DAMAGED TREES IN SOUTHWEST OREGON by Mark L Hanus David W Hann David D Marshall A p r i l 2 0 0 0

Hydraulic safety margins and embolism reversal in stems and leaves: Why are conifers and angiosperms so different?

Creator:: Johnson, Daniel M., McCulloh, Katherine A., Woodruff, David R., and Meinzer, Frederick C.
Abstract:: Angiosperm and coniferous tree species utilize a continuum of hydraulic strategies. Hydraulic safety margins (defined as differences between naturally occurring xylem pressures and pressures that would cause hydraulic dysfunction, or differences between pressures resulting in loss of hydraulic function in adjacent organs (e.g., stems vs. leaves) tend to be much...
Resource Type:: Article
Full Text:: available at SciVerse ScienceDirect Plant Science jou rn al hom epa ge: www.elsev ier .com/ locate /p

Scheduling replacement of logging equipment : some quantitative guidelines

Creator:: Butler, David A., LeDoux, Chris B., and Oregon State University. Forest Research Laboratory
Abstract:: The authors describe a new,theoretical methodology for evaluating the replacement of a single piece of logging equipment with a predetermined new model. The example is for a specific piece of equipment and gives results unique to the data-base analyzed, but the application typifies procedures, required data, and results of the...
Resource Type:: Technical Report
Full Text:: replacement of logging equipment: some quantitative guidelines David A. Butler Chris B. LeDoux G FORE/T

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Creator:: Mulvey, Robin L., Shaw, David C., and Maguire, Douglas A.
Abstract:: The influence of fertilization on disease severity is unknown in most forest pathosystems. Fertilization treatments were randomly applied to 0.01 ha plots centered on individual dominant or co-dominant Douglas-fir trees in ten Douglas-fir stands from coastal Oregon to the foothills of the Oregon Cascade Range, USA. This region is affected...
Resource Type:: Article
Full Text:: . Mulvey ⇑, David C. Shaw, Douglas A. Maguire Department of Forest Engineering, Resources and Management

Enhanced mortality equations for trees in the mixed conifer zone of Southwest Oregon

Creator:: Hann, David W., Hanus, Mark L., and Oregon State University. Forest Research Laboratory
Abstract:: Equations for predicting the probability of a tree's dying in the next 5 years are presented for eight conifer and eight hardwood tree species from southwest Oregon. A logistic equation form was used to characterize the probability of mortality. The parameters of the equation were estimated using weighted, maximum likelihood...
Resource Type:: Technical Report
Full Text:: THE MIXED CONIFER ZONE OF SOUTHWEST OREGON by David W. Hann Mark L. Hanus Editing, word

Affinities of the Boletus chromapes group to Royoungia and the description of two new genera, Harrya and Australopilus

Creator:: Halling, Roy E., Nuhn, Mitchell, Osmundson, Todd, Fechner, Nigel, Trappe, James M., Soytong, Kasem, Arora, David, Hibbett, David S., and Binder, Manfred
Abstract:: Harrya is described as a new genus of Boletaceae to accommodate Boletus chromapes, a pink capped bolete with a finely scabrous stipe adorned with pink scabers, a chrome yellow base, and a reddish brown spore deposit. Phylogenetic analyses of large subunit rDNA and translation elongation factor 1α confirm Harrya as...
Resource Type:: Article
Full Text:: Soytong, Kasem; King Mongkut’s Institute of Technology, Faculty of Agricultural Technology Arora, David

Salmonberry and salal annual aerial stem production: the maintenance of shrub cover in forest stands

Creator:: Tappeiner, John C., Zasada, John C., Huffman, David W. (William), 1962-, and Ganio, Lisa M.
Abstract:: Annual sprouting of aerial stems and ramets enables populations of salmonberry (Rubus spectabilis Pursh), salal (Gaultheria shallon Pursh), and probably other forest shrubs to maintain dense covers (>20 000 stems/ha). We studied annual stem production of salmonberry on cut (all stems cut within 15 cm of the ground) and uncut...
Resource Type:: Article
Full Text:: production: the maintenance of shrub cover in forest stands1 John C. Tappeiner, II, John C. Zasada, David W

ScholarsArchive@OSU

High diversity and widespread occurrence of mitotic spore mats in ectomycorrhizal Pezizales

Asymmetrical effects of mesophyll conductance on fundamental photosynthetic parameters and their relationships estimated from leaf gas exchange measurements

Evaluation of nonspatial approaches and equation forms used to predict tree crown recession

Predicting height to crown base for undamaged and damaged trees in southwest Oregon

Hydraulic safety margins and embolism reversal in stems and leaves: Why are conifers and angiosperms so different?

Scheduling replacement of logging equipment : some quantitative guidelines

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Enhanced mortality equations for trees in the mixed conifer zone of Southwest Oregon

Affinities of the Boletus chromapes group to Royoungia and the description of two new genera, Harrya and Australopilus

Salmonberry and salal annual aerial stem production: the maintenance of shrub cover in forest stands

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