F nearly a century there has been concern that several of California’s 20 native oak species are not regenerating adequately (Jepson 1910). Such concern was partially responsible for the 1986 establishment of the Integrated Hardwood Range Management Program (IHRMP), a cooperative effort to promote oak woodland conservation by UC, the California Department of Forestry and Fire Protection, and th...

G. J. MacDougall,1 H. M. Christen,2,* W. Siemons,2 M. D. Biegalski,3 J. L. Zarestky,4,5 S. Liang,2,6 E. Dagotto,2,6 and S. E. Nagler1,7 1Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA 2Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA 3Center for Nanophase Materials Sciences, Oak Ridge Nat...

We assessed the impacts of hay-scented fern (Dennstaedtia punctilobula (Michx.) Moore) and subsoil liming (CaO amendments) on root and shoot growth of greenhouse-grown, first-year, northern red oak (Quercus rubra L.) seedlings. Red oak seedlings and ferns were grown in reconstructed soil profiles of four common Pennsylvanian forest soils. When grown in the presence of hay-scented ferns, with or...

quapin oak (Q. muehlenbergii Engl.) leaves were exposed to high temperatures at various photosynthetic photon flux densities under laboratory conditions to determine if species-specific responses to these factors were consistent with the distribution of these oaks in gallery forests in the tallgrass prairies of northeastern Kansas, USA. Measurements of the ratio of chlorophyll fluorescence decr...

We summarize available information about the relationships between oak overstory and understory plants for major California rangeland types. Understory biomass, productivity, and plant species composition vary considerably because of geographic location, overstory species composition, and overstory density and distribution. Deciduous oak canopies in areas with less than 50 cm annual precipitati...

—Oak (Quercus spp.) stump sprouts are vital to sustaining oak’s presence and long-term dominance when regenerating oak or mixed-hardwood forests in southern Indiana. A study was initiated on the Hoosier National Forest in southern Indiana in 1987 to predict the sprouting potential and dominance probability of oaks. Before clearcut harvesting, we sampled 2,188 trees of fi ve oak species and meas...

1 Oak Ridge Associated Universities, Oak Ridge, TN 37831 USA 2 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA 3 Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 4 Department of Physics and Astronomy, Rutgers University, New Brunswick, NJ 08903 USA 5 Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 U...

Hermaphroditic flowers blooming unseasonably on an oak tree (»the green oak«) of uncertain hybrid origin prompted a detailed investigation into the biology of the flowering, and the morphology of various traits of the tree, which is growing in an urban area near Zadar, northern Dalmatia, Croatia. Hermaphroditic flowers were also detected on one holm oak tree from Weihenstephan, Germany. Since t...

The natural history of the model yeast Saccharomyces cerevisiae is poorly understood and confounded by domestication. In nature, S. cerevisiae and its undomesticated relative S. paradoxus are usually found on the bark of oak trees, a habitat very different from wine or other human fermentations. It is unclear whether the oak trees are really the primary habitat for wild yeast, or whether this a...

The relative importance of livestock grazing in limiting or enhancing oak recruitment remains unclear because results from previous studies have been contradictory. In Santa Barbara County, we have replicated large-scale planting experiments from 1997 to 2001 to determine the effects of cattle and other factors on seedling establishment of valley oak (Quercus lobata) and coast live oak (Q. agri...