Establishing a Range-Wide Provenance Test in Valley Oak (Quercus lobata Née) at Two California Sites

Phenotypic Variation in California Populations of Valley Oak (Quercus lobata Née) Sampled Along Elevational Gradients

California oaks exhibit tremendous phenotypic variation throughout their range. This variation reflects phenotypic plasticity in tree response to local environmental conditions as well as genetic differences underlying those phenotypes. In this study, we analyze phenotypic variation in leaf traits for valley oak adults sampled along three elevational transects and in young seedlings grown from ...

Spatial Clustering and Ecological Crowding of Valley Oak (Quercus lobata, Née) Associated with Shifts in Recruitment Establishment Sites in Southern California

1. Distribution and Status of the Valley Oak (quercus Lobata Nee) in California

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...

Landscape genetics and population structure in Valley Oak ( Quercus lobata Née ) 1

Gene fl ow in plants occurs through the dispersal of pollen or seeds. Pollen-mediated gene fl ow is oft en extensive in plants that are pollinated by wind. Although long-distance (landscape-level) pollen movement is diffi cult to measure directly, paternity studies have shown that average pollination distances within stands of windpollinated trees is ten to hundreds of meters and pollen immigra...

Conserving the evolutionary potential of California valley oak (Quercus lobata Née): a multivariate genetic approach to conservation planning.

California valley oak (Quercus lobata Née) is a seriously threatened endemic oak species in California and a keystone species for foothill oak ecosystems. Urban and agricultural development affects a significant fraction of the species' range and predicted climate change is likely to dislocate many current populations. Here, we explore spatial patterns of multivariate genotypes and genetic dive...