Quercus cedrosensis C.H.Mull.

국표에 없다.

The presence of the species in California was not known to science until 1995. Given the lack of published in-depth studies, it is now imperative to learn more about this oak’s habitat to better understand its growth patterns and future challenges to its survival.

Thus far, in California, only a handful of occurrences have been discovered near the US-Mexico border, in and around the Otay Mountain Wilderness. This is a rugged area of San Diego County, characterized by deep canyons with steep, rocky, meta-volcanic walls, often shrouded in fast-moving fog. It’s a sky island with a seasonal ebb and flow of running water critical to the oaks growing along these seasonal drainages. Increasing periods of drought, wildfires, and border activities are serious threats to an oak that is already experiencing very low recruitment. These challenges highlight the need for both in-situ and ex-situ conservation efforts to insure the survival of this species.

Quercus cedrosensis usually presents itself as a medium to large shrub with a dense canopy but can, on occasion, attain a true tree form. The leaf morphology of this species is an important factor in the process of identification. The small-sized leaf with a glabrous underside and white venation, a pronounced pointed tip, and smooth or only marginally serrated leaf edges at maturity are some distinctive traits to look for. For the past several years, conservation specialists from the San Diego Botanic Garden (SDBG) have explored the region and collected important data on population distribution, acorn production, and growth patterns, which they have generously shared with several conservation partners.

In December of 2019, The Global Conservation Consortium for Oak (GCCO) was launched with the goal of saving oaks by coordinating oak conservation efforts throughout a network of institutions working together. The GCCO plays an important role in organizing and supporting several institutions having common objectives at both a regional and international level. In October of 2020 the San Diego Zoo Wildlife Alliance (SDZWA) joined forces with other partners to create future ex-situ collections of six oak species of conservation concern; among these species was Q. cedrosensis. The creation of ex-situ collections will provide ideal conditions for monitoring the species up close and facilitating propagation efforts.

Conservation Efforts for Quercus cedrosensis | International Oak Society

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