Oaks in Marin respond to fire mimicry

24 03 2017

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On Monday I checked on three coast live oaks trees in Marin County, CA that I’ve been treating with fire mimicry for several years. The first case study (above and below photos) shows the recovery of a large oak after five years of ongoing  fire mimicry treatments. The canopy of this oak is clearly lusher and denser compared to the time of initial treatment.

To remind the reader, fire mimicry treatments are based on traditional forest management practices used by past and present native people in California and elsewhere. The treatments focus on creating habitat and soil conditions favorable for oaks and other native trees.

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(Note that the pine tree behind this oak has since been removed.)

The next case study is a large coast live oak that has received ongoing fire mimicry treatments for three years, as well as several surgical procedures on stem cankers. When I first examined this oak it was severely defoliated and had several small stem cankers (possibly Sudden Oak Death disease) in the trunk. I told the owner that I was not sure the oak could be saved, but he insisted I try. It appears that the owner’s insistence has paid off. The oak has shown a noticeable improvement in canopy lushness and density (see photo sets below). Read the rest of this entry »





Diseased oaks flourishing after 12 years

29 11 2016

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Twelve years ago today I initiated fire mimicry treatments on a grove of diseased coast live oaks in Marin County, CA. Since then Leith Carstarphen has been doing the followup work on these trees. Several of these oaks have stem canker infections, probably Sudden Oak Death disease. Two of the oaks in this grove have since died from stem canker infections, but the remainder of the oaks are clearly flourishing.

I should note that, for the above oak, the yellow appearance of the foliage in the recent (right) photo is due to dense clusters of yellowish male flowers.

These thriving oaks stand as testimony to the long-term efficacy of indigenous-based tending techniques (e.g., fire mimicry) in restoring the health of oak forests.

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