Soil Ecology and Research Group last update September 12, 2001

Island Oak (Quercus tomentella) Reforestation

The woodlands of San Clemente Island have been severely and adversely impacted by the effects of historic long-term overgrazing by unmanaged feral herbivores. While some species have shown signs of recovery in the past few years since the removal of the last feral grazers, very little recruitment and establishment has been observed for the Island Oak (Quercus tomentella). Known only from California's Channel Islands, this taxon is represented on San Clemente Island by numerous individuals in both small groves and solitary trees.

Efforts will be made to increase the populations of Island Oak. A survey will be made of all existing populations to assess vigor and reproductive disposition. Each grove, and as many solitary trees as possible, will be visited. Seed will be collected, and the status of the grove or individual tree recorded. Data to be recorded will include, seed status for the current year; evidence of seed production from previous years; number of seedlings/saplings present; and the general vigor of the grove or individual tree. Data will be maintained in an electronic database for subsequent year comparisons. Seed will be sorted, weighed in lots, treated to reduce fungal infection, and stored until planted. Planting will occur during the winter when soil moisture levels are optimal for germination, as determined by the staff botanist. Plantings will be adequately marked to enable collection of germination data.