Oaks (Quercus) are economically important, and their seed (acorns) a valuable food for many animals. Thus, forest managers must consider potential tradeoffs between oak growth acorn production. I used 13 years of dbh 17 trapping data on 195 trees five common eastern species to compare stand-level production closed canopy mature (M) recent shelterwood with reserves regeneration harvests (SW) (BA...

Pine-oak ecosystems are globally distributed even though differences in anatomy and leaf habit between many co-occurring oaks and pines suggest different strategies for resource use, efficiency and stomatal behavior. The New Jersey Pinelands contain sandy soils with low water- and nutrient-holding capacity providing an opportunity to examine trade-offs in resource uptake and efficiency. Therefo...

Oaks (Quercus spp.) are considered model plants for studying plant evolution and natural gene introgression. Beijing area is at the junction between Taihang Mountain Yanshan Mountain, it an overlapping distribution of several deciduous oaks native to China. Interspecific hybridization often occurs in sympatric sibling species, resulting blurred interspecific boundaries hindering development bre...

1Division of Immunology and Rheumatology, Stanford University, Palo Alto, California, USA 2Division of Rheumatology, Department of Medicine, Santa Clara Valley Medical Center, San Jose, California, USA 3Infl ammation and Immunology, Pfi zer Inc, Collegeville, Pennsylvania, USA 4Global Biostatistical Science, Amgen Inc, Thousand Oaks, California, USA 5Department of Biostatistics, KForce Clinical...

The valley oak (Quercus lobata Neé) is among the largest and longest lived of the North American oaks, attaining trunk diameters up to 4 m, heights of 12 to 25 m, and ages of 300 years or more. Unique to California, this oak is also one of California’s most familiar and evocative icons. Where they occur, large valley oaks are focal visual and ecological elements of both developed and rural land...

We measured patterns of spatial synchrony in growth and reproduction by oaks using direct acorn surveys, published data on acorn production, and tree-ring chronologies. The two data sets involving acorn production both indicate that acorn crops are detectably synchronous over areas of at least 500 to 1,000 km not only within individual species but among species that require the same number of y...

From 2009–2011, we assessed the impact of the goldspotted oak borer, Agrilus auroguttatus Schaeffer, or its sibling species, Agrilus coxalis Waterhouse, at locations in southern California (denoted infested: ICA and uninfested: UCA), southeastern Arizona (AZ), and southern Mexico (MX). Our surveys examined forest composition of oak woodlands; the degree of injury and proportion of oaks infested...