Oak restoration project in Boulder Creek, CA – 2024 Update

6 12 2024

Six years ago I began a forest restoration project in Boulder Creek, CA using fire mimicry treatments to help improve the health of a grove of coast live oaks, some of which are likely more than 250 years old. Additionally, two of the oaks had bleeding stem cankers (probably Sudden Oak Death) that were surgically removed, cauterized, and poulticed.

In 2022 most of the oaks were pruned to help reduce the canopy size, which lowers the risk of both wind and fire damage to the trees. The pruning also allows for more light to reach the lower branches resulting in improved density and lushness of the inner canopy foliage.

Last Tuesday I made my annual pilgrimage to this grove to re-photograph the oaks and to assess their response to the fire mimicry treatments. Here are the case study results showing canopy conditions at the time of initial treatment (2018) and a few days ago (2024).

Note, also, the last two photo sets that show the rapid recovery of two surgical wounds (on the same old-growth oak). The absence of any residual bleeding from the wounds indicates that the surgeries were successful in removing the stem canker infections. I’m calling this a win!

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After 4 yrs of fire mimicry treatments, these oaks have something to say …

21 11 2024

Four years ago I began fire mimicry treatments on several coast live oaks, some of them centuries old. A few days ago I checked on their responses. Enjoy!

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The Vizcaino Oak: The life and death of a legacy tree

20 11 2024

For thousands of years the Native Peoples living here along the central coast of California, the Esselen and the Rumsen (Figure 1), tended the lands with cultural fire and other management practices, creating mosaics of oak forests, redwood forests, savannas, chaparral, and scores of other land and marine ecosystems, which together helped sustain the People, the plants, and the wildlife. Over time, the lowlands and hillsides surrounding Monterey Bay, like in many other places in California, came to be dominated by old-growth oak forests and woodlands, as these provided rich sources of acorns and other important foods.

Figure 1. Native Indians of the Monterey, California area circa 1791 as drawn by José Cardero.

On the evening of December 16, 1602, this all began to change when the first western colonizers, the Spanish Vizcaino Expedition, sailed into Monterey Bay (Figure 2). They were, no doubt, noticed by the nearby Rumsen People, but it wasn’t until the next day that first contact was made. That morning, Ensign Alarcon arrived in a landing boat with orders from the admiral to “make a hut where a mass could be said and to see if there was water, and what the country was like.” He soon reported back that there was fresh water and “a great oak near the shore”, where a hut and arbor were prepared for mass. Upon hearing this news Sebastian Vizcaino and crew embarked to shore and a Catholic mass was said at the improvised altar under this “great oak.”

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Demonstration of a canker surgery on a coast live oak

31 10 2024

Happy Halloween! Today’s canker surgery on a ghost (coast) live oak gave off a real Halloween vibe. The surgery was gruesome, deep pockets of dark, discolored diseased tissue spreading inside a centuries-old oak. Let me take this grisly opportunity to show how I’ve been able to remove potentially deadly stem canker infections in oaks.

The first steps are to gather the necessary tools (large axe, small axe, multitool, grinder w/ cutting edge), sterilize the tool cutting surfaces with a blow torch, and prepare the surgical area to collect the diseased tissue. I’ve already identified, roughly, the extent of the canker by observing the areas of bleeding, as seen above in the lower trunk just to the left of center.

Donning gloves, hat, and eye protection I began the surgery using a large chopping axe with a two-foot handle. For surgeries I prefer to use chopping axes, which have narrower heads than splitting axes. My initial efforts are to find the limits of the infection so as to isolate it from the rest of the tree. In the above photo the dark-colored diseased tissue is clearly visible in the center of the image. The reddish tissue is healthy bark, and the white tissue is healthy wood. I sometimes say “the redder the better” and “wood is good”.

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Big Sur oaks recovering from colonization

30 10 2024

Here are four coast live oaks and a black oak we treated back in 2020. Some additional surgery was done in 2022 to remove lingering canker infections on the oak above. While the above ancestor oak (300+ years old) is still diseased, further surgery and fire mimicry treatments should keep it alive for decades.





The Old Oaks Home

30 07 2024

There’s a special place near Monterey that is an oak lover’s dream – over 600 acres of undeveloped, intact old-growth oak forest and savanna, never burned, that I’ve been commissioned to tend. In 2022 I surveyed about 25% of the property and identified over 200 ancient, culturally-modified coast live oaks (“ancestor” oaks) that date from the time when the Rumsen-Ohlone Indians were the sole human occupants of the land (> 300 years old). Every one of these oaks is a living cultural artifact of the Rumsen-Ohlone People. I’m guessing there may be nearly 1000 “ancestor” oaks on the property, many of which are over 500 years old. Thus, I refer to this place as “The Old Oaks Home”.

These ancient oaks are in a precarious situation. Given that fires have not burned here in well over 100 years, the forests are now overcrowded with young oaks and the grassland savannas have been mostly replaced by chaparral. A single spark could end the lives of hundreds of these ancient beings in just a day or two. So far, luck has been on the side of these elders, but their luck is running out for every year we postpone care.

In lieu of fire, I have been applying fire mimicry treatments to several of the ancestor oaks over the past couple years and am seeing a significant improvement in the density and lushness of the canopies of these trees. The above and below photos show the treated oaks today, compared to their appearance two years ago. Enjoy!

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CBS News segment today

29 06 2024

The CBS Saturday Morning News show ran a segment on the work that Little Bear (Chairman of the Esselen Tribe), I, and others are doing to restore the forests in Big Sur. Here is the CBS link to that well-done piece of reporting:





Coast live oaks in Salinas recovering after 4 years

31 05 2024

In 2020 a good friend contacted me about care for his sick oaks. I immediately responded and applied fire mimicry treatments on several of his oaks, including a control oak that I did not treat (see below). Here are the results after four years. Note below that one of the diseased oaks initially began to recover nicely in 2021, but ended up dying in 2022. The oak shown above had a stem canker infection (probably Sudden Oak Death) that was surgically removed in 2020, and now shows no sign of lingering infection.

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Coast live oaks, one requiring surgery, recovering after two years

30 05 2024

The coast live oak shown above was severely diseased with two large stem canker infections when I first arrived two years ago. Without promises of recover, I suggested two surgical procedures, as well as fire mimicry treatments to this and several non-diseased neighboring oaks. Below are the two surgical wounds depicting two years of healing. Note there is no residual bleeding or other signs of stem canker infection. Remaining photo sets below show the responses of the neighboring oaks to fire mimicry treatments. Happy to report that we’ll be returning soon to treat these oaks again.

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Who knew? Sweetgum too!

29 05 2024

Last year a good friend’s mother contacted me about a sick sweetgum tree at her home in Carmel. I inspected the tree and saw that it was nearly dead. Although I had never treated a sweetgum tree before, as there seemed little likelihood that the tree would survive, I proposed we try a fire mimicry experiment. She agreed, so a major limb that was all but dead was removed, a surgery was done to remove a severe wood rot infection, the soils around the tree were amended with shells, ash, biochar, and compost tea, and a limewash was applied to the trunk. One year later …