Gloria Ferris

one woman’s view from a place by the zoo in the city

Archive for the ‘replacement cost’ Category

economics – Is the value of a tree $193,250?

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Here is an interesting sign I first saw on Facebook. There will be much quibbling over the numbers, but one thing remains clear: Mature trees have great value for many reasons.

There is a sign, at the Eden Nature Park & Resort in City of Davao, Philippines, that says this:

Of concern to all! A tree is worth $193,250

According to Professor T.M.Das of the University of Calcutta. A tree living for 50 years will generate $31,250 worth of oxygen, provide $62,000 worth of air pollution control, control soil erosion and increase soil fertility to the tune of $31,250, recycle $37,500 worth of water and provide a home for animals worth $31,250. This figure does not include the value of fruits, lumber or beauty derived from trees. Just another sensible reason to take care of our forests.

From Update Forestry Michigan State University

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The figure, sometimes incorrectly quoted as $196,250, is cited at various green blogs, and sold on a bright red poster at Singapore Zoological Gardens, but i haven’t been able to find the study behind it.

So is a tree living for 50 years worth $193,250?

economics – Is the value of a tree $193,250? – Skeptics Stack Exchange

Written by Gloria Ferris

September 25th, 2013 at 8:52 am

(1) Walk with the Trees in W.C. Reed Park

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Here is some ancillary material Larry Cornett posted to this coming Saturday’s Facebook event. I present it here so that it will be available on the internet for a long, long time. I think the reasoning here is incredible. Whenever federal money shows up, common sense, individual rights, and intrinsic values fly out the window.

Larry Cornett

US EPA currently plans to cap Reed Park and remove most of the trees. Reasons given for removing the trees include:
* It would cost money to save them
* Only a few people at public meetings focused on saving the trees.
* The roots of trees only extend 8” below the surface and putting two feet of fill above the roots of the trees to cap the soil would deprive them of oxygen and eventually kill them
* Many of the trees are old…
* Some trees are sick or dead
* Some species of trees are undesirable
* Some of the trees are not structurally sound and could fall on children
* If a tree blows down, exposing the roots, subsurface contamination would also be exposed
We need to have activists, ecologists, arborists, and others accompany the forester and EPA in the park on Saturday.
A previous brownfields study in the park showed concentrations of polynuclear aromatic hydrocarbons (PAH) above those acceptable for direct contact in the fill material sampled to depths of 2’ or 4’ in most of the park. Three to six inches of grassy topsoil has been covering most of the surface of the park and subsurface fill material for about 50 years or more. Portions of the park are also covered with concrete or sand (in the baseball diamond).
The topsoil was never separately analyzed to determine if it presents a significant risk from direct contact. Fungus and other microorganisms in grassy topsoil have been found to destroy PAHs at a rate of 0.2% to 17% per month. Microorganisms associated with tree roots can also destroy PAHs. For details, see

http://www.academia.edu/2908115/Comparison_of_Trees_and_Grasses_for_Rhizoremediation_of_Petroleum_Hydrocarbonsn.

Until the topsoil, etc. are sampled and analyzed, NO SIGNIFICANT RISK FROM DIRECT CONTACT WITH THE SOIL AT THE SURFACE OF THE PARK HAS BEEN ESTABLISHED, although there would be a need to rebury or treat contaminated fill material that would be excavated where and when the City does any construction in most of the park.
For more details, see:
http://freindsofwcreedfield.ning.com/
https://www.facebook.com/events/218610251634716/permalink/218663454962729/See More

Comparison of Trees and Grasses for Rhizoremediation of Petroleum Hydrocarbons

www.academia.edu

“Rhizoremediation of petroleum contaminants is a phytoremediation process that depends on interactions among plants, microbes, and soils. Trees and grasses are commonly used for phytoremediation, with trees typically being chosen for remediation

(1) Walk with the Trees in W.C. Reed Park

Walk with the Trees in W.C. Reed Park

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On Facebook, Larry Cornett has publicized an event that deserves the participation of everyone who believes in the preservation of our commonly held assets, such as mature trees.

And while I’m at it, here is an intelligent article for your delectation and delight about the effect of trees on market values in a neighborhood: http://www.naturewithin.info/Policy/Hedonics_Citations.pdf

Please come join the tree dialogue in Brooklyn Centre this weekend. This is an issue that affects not only our neighborhood but all of our urban areas.

  • Saturday, September 28, 2013
  • 1:00pm until 4:00pm
  • W.C. Reed Park 1700 Denison Avenue
  • Please come! We need your help!
    US EPA coordinator James Justice has scheduled a walk through the park with ODNR Urban Forester Alan Siewert.
    1. Mr. Justice thinks because we didn’t focus on the trees at the Public Meeting therefore, they are not an issue….
    2. Mr. Siewert is a FORESTER not an arborist. He sees trees from a timber perspective not an environmental and ecological perspective.
    3. Mr. Siewert has identified 8 trees worthy of saving of the 61 trees in the park.
    WE NEED YOUR HELP! We need people there who have an environmental and ecological perspective as well as people who understand the value of urban trees to the beauty of a neighborhood. If you can, please come Saturday. If you can’t please give us arguments and reasons WHY existing trees and soil are good remediators for PAHS toxins and should NOT be removed from the park.

Walk with the Trees in W.C. Reed Park

Written by Gloria Ferris

September 25th, 2013 at 5:08 am