Let it Burn or Suppress It? US Park Service vs Cal Fire Policy

This past summer brought us the gigantic Rim fire that devastated Yosemite National Park and surrounding communities. Over 4,900 firefighters operated under a unified command, however when the fire crossed over into the boundary between state and national park land, the National Park Service took a very different approach than Cal Fires (California Department of Forestry and Fire Protection). Continue reading “Let it Burn or Suppress It? US Park Service vs Cal Fire Policy” »

What to do With Your Xmas Tree?

Fortunately, most municipalities now have recycling programs for green waste, making it easier for homeowners to recycle their used Xmas tree.  Recyclers grind or shred trees into a mulch which is then composted and eventually becomes available as a bulk or bagged mulch product.  This is certainly a preferable option than the “old days” when trees were commingled with regular trash and buried in landfill sites.

If you have a large tree, prune off some branches and reduce the overall size to ensure local curbside pickup.  If you have the room on your property, you can do your own recycling via a compost bin, pile or simply leaving the tree in an area where it will slowly decompose on its own.  Leaving a tree whole may also become home to birds and other animals for shelter or nesting site.  Make sure all tinsel and other decorations have been removed from the tree.

If you  have a live tree, it can be re-planted into the outdoor landscape.  Remember, depending on the variety of pine tree, these are typically large growing trees.  Despite the small size now, ten to twenty years down the road, you may have a forty to sixty foot tall tree.  I have seen this issue while consulting on residential sites where a neighbors Xmas tree planted near the property line grew to fifty-five feet, with limbs and roots encroaching into the clients property, damaging concrete improvements and posing an increased safety  risk.  If you are going to re-plant the tree, make sure you have the space for a large pine tree to grow, avoid planting near property lines, driveways, sidewalks and patios.

For more information about Xmas tree recycling, check out this article at:

Making the most of the Christmas Tree

At Yosemite, Infrastructure Out to Benefit Giant Sequoia’s!

Read an article in the Los Angeles Times concerning upcoming changes at Yosemite National Park. There is a proposal to remove public parking, a gift shop and tram operations in an effort to minimize impacts to the Mariposa Grove, a grove of approximately 500 Giant Sequoia trees (Sequoia giganteum).

The Park service recognizes paved surfaces and infrastructure are “compacting the soil, encroaching on sequoia roots and interfering with natural drainage patterns”. Tram service will be limited to the south entry of the park and shuttle buses would take people tot he entrance of the lower grove, where the largest and oldest trees are located. Access to the upper grove would be by foot only. Approximately four acres of paved surfaces would be removed from the grove. A final decision on the proposal will be made by end of the year.

Measured by mass, the giant sequoia is the worlds largest living organism. Californian’s are fortunate to have bragging rights to hosting these ageless giants living on the western slope of the Sierra Nevada. They exist in scattered groves typically on federal land.

My dad took me to Sequoia National Park when I was just a young kid, I still vividly remember the awe I felt looking at the General Sherman tree. If you haven’t seen a giant sequoia, you owe yourself and family a trip to Yosemite or Sequoia National Park to see these living legends. Their sheer mass and regal beauty is indescribable. I think this is great news for the future survival of the sequoia grove, which we almost lost due to the recent mammoth fire at Yosemite.

When trees conflicts with infrastructure, tree usually loose out.  It is an encouraging turn of events when trees are recognized more valuable than a parking lot and gift store, hopefully this trend will continue.

Read the article at Redwood Grove Saved

Can a Tree Capture Particulate Matter from the Air?

For years, certified arborists and urban foresters have learned the many benefits of trees. Energy savings are one of the foremost known benefits of trees as they shade building during the summer reducing the need for air conditioning and deciduous tress allow sunlight to reach structures during winter months, solar radiation decreasing the need for winter heating.

Another known benefit for trees are their ability to reduce storm water runoff and erosion, particularly during the winter months. Tree root systems bind soil particles and slow storm runoff from roofs and other impervious surfaces, trees act as bio filters, slowing storm and irrigation water runoff and allowing the water time to slowly percolate into the soil profile rather than run off into the street or storm drain system.  By forcing water to pass through the soil profile, rather than runoff into storm drain systems, the soil mass filters impurities before the water enters into streams, ponds and aquifers.

Birch Tree planting works as filter

A Birch street tree planting used for testing as a green filter to remove particulate matter from the air we breath

Continue reading “Can a Tree Capture Particulate Matter from the Air?” »

Love the Beauty of Your City? Thank the Landscape Architects who Made it Happen

I recently read a great article by Delle Willett of the North Park News entitled Landscape Architects:  Artists with the Earth as a Canvas.  The article focused on three local women landscape architects who have made significant contributions to enhancing the aesthetics and functionality to the City of San Diego.

While reading about the history of female landscape architects, I couldn’t help be reflect on my own background and education within the fielof landscape architecture and landscape contracting.  As a college student, my path began at UC Santa Barbara and completed with a Bachelor of Science degree from California Polytechnic University, Pomona.

I wrote and article correlating my own academic history with the three landscape architects discussed in the newspaper article.  For men or women interested in the field of landscape architecture, design, planning, horticulture, arboriculture and landscape contracting, or anyone who struggled to find their own passion and career path in college, I think you’ll enjoy the read.

Landscape Architects Making Significant Contributions to City of San Diego

Landscape Architects: Artists with the Earth as a Canvas.

 

 

Is Global Warming Affecting Redwood Trees in California?

I read a very interesting article in the L.A. Times concerning possible affects of global warming on both the Giant and Coastal Redwood tree populations in California. There might actually be some good news associated with global warming, recent scientific studies have documented growth spurts in both the coastal redwoods and giant sequoias.

Since the 1970’s, taking corings from trees more than 1,000 years old, scientists claim certain coastal redwoods have experienced the fastest growth ever. “The forests are not experiencing detrimental impacts from climate change” stated Emily Burns, science director at the Save the Redwoods League.

A variety of factors besides climate change could explain the increased growth rates said professor Stephen Sillett of Humboldt State, one of many researchers. Scientists established 16 research plots in old growth redwood and sequoia forests throughout their respective ranges. They took pencil width corings from 78 redwoods, studied the tree rings and developed a chronology dating back year 328. They also took corings from sequoias, analyzed the rings and dated the trees back to 474!

The data revealed redwood trunk growth in recent decades has “shattered” all records. The global warming records and effects on regional precipitation are less clear, indicating highly variable precipitation but overall no significant decline in the recent study areas. One theory is old giant sequoias might be growing faster because rising temperatures have extended the growing season in the Sierra Nevada.

Other theories include redwoods receiving more sun due to reduced fog in coastal climates yet still getting the precipitation they require or getting more sunlight due to a reduction in air pollution in north coastal areas from reduction in wood processing plants.

A great side benefit of the research was discovery of an ancient tree that corings revealed the oldest coastal redwood on record, 2,500 years old, besting the previous record holder by 300 years!!

When is comes to climate change, Professor Sillett added “I’m more worried about humans than I am about redwoods. I think they’re going to hold their own”. Very glad to hear this positive redwood assessment although a bit concerned about the human race.

Click to read the full article Is Climate Change Affecting Redwoods?

Oak Tree Failure Kills Counselor at Camp Tawonga

Camp Tawonga Tree Failure

My son Jake called yesterday very upset, telling me about an oak tree falling and killing a counselor at Camp Tawonga near Yosemite, CA.  My son graduated with a degree in Environmental Studies and Economics from UC Santa Cruz last June and worked the summer at Camp Tawonga.  He loved working there and returned for some part time work last fall.

What was chilling was his description of the exact location where the tree fell, he said he often sat nearby the spot and even sat under the tree!  He knew the counselor, Annais Rittenberg from UC Santa Cruz, where he also took the environmental field course his senior year.  Needless to say, he is shocked by what happened.

As a certified arborist, I provide tree risk assessments, a process of tree investigation and analysis that rates a tree defects and determines the hazard potential of a tree part or whole tree failure.  I have worked with plaintiff and defendant attorneys concerning tree failures and accidents, yet this accident struck very close to home.  I keep thinking about how that easily could have been my son under that oak tree when it failed.

Who knows if this failure could have been predicted?  My son mentioned how the area where the tree was located was irrigated daily throughout the summer, he said the tree trunk split and fell.  Was there root rot, cavities, or decay in the trunk?  Was the crown showing signs of stress?  Would a risk assessment have determined the tree was structurally unstable?  Maybe yes or no, I certainly don’t want to speculate, as I do not know the facts.

Tree failures resulting in human fatalities are very low, yet it only takes one failure to change lives forever.  My heart and sympathies to the family for the terrible loss.

This should serve as a reminder to camps, recreational facilities, golf courses, R.V. parks and manufactured housing communities to inventory and inspect your tree assets on your property, common spaces and even notify homeowners of endangered trees on their private lots or property.  Facility owners who take proactive measures to inspect, inventory, assess and maintain their tree assets increase the chance of detecting and minimizing tree related accidents before they happen.