There has been widespread concern that some native California oaks were not regenerating adequately. Three California oak species (blue oak, valley oak and Engelmann oak) have been repeatedly identified as species that have inadequate regeneration to maintain current stand densities.There has been considerable research during the past several decades on where and why oak regeneration is problematic and how to successfully artificially regenerate oaks. In addition, the University of California has hosted numerous trainings where the latest information on oak regeneration has been disseminated. Below are links to several publications on oak regeneration.
Enhancing Native Oak Regeneration
Blue oak is a native California species that is regenerating poorly in portions of its range. Although successful techniques to artificially regenerate blue oak have been developed, they are costly, complicating restoration efforts. Use of volunteer seedlings, the subject of this study, could potentially be more cost-efficient and would guarantee that only local, well-adapted seedlings are used. See Results of this study HERE.
Blue Oak Sprouting Research
Public concerns about habitat damage in areas harvested for firewood led to this study of resprouting, to assess long-term trends in oak cover following harvesting and the potential of sprout (coppice) management to sustain woodlands. Models of sprouting probability, height, and canopy growth have been developed. The complete study can be accessed HERE.
Oak Seedling Establishment on Grazed Rangelands
The UC Integrated Hardwood Range Management Program (IHRMP) has conducted several research studies at the Sierra Research and Extension Center to identify grazing management practices and seedling protection techniques that will allow outplanted oak seedlings to survive from the seedling to the sapling stage, even in areas grazed by cattle. More details HERE.
Listen to a Webinar
All webinar segments were taped for the Oak Webinar Series hosted by UCCE Forest Specialists and Advisors in collaboration with University of California Agriculture and Natural Resources Division.