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In Defense of Trees
BY: JOSH BEHOUNEK & PAUL JOHNSON
ISA Pledge
I pledge as an ISA Certified Arborist to:
 Adhere to the Code of Ethics,
 Comply with all accepted professional
standards,
 Deliver safe & competent services with
objective & independent professional
judgment,
 Disclose potential conflict of interest,
and
 Follow appropriate health & safety
procedures to protect clients,
employers, employees, and the public.
The Tree..
Green ash  Fraxinus
pennsylvanica
16 dbh
Street Tree
In Defense of Trees
I speak for the trees
Negligence
 A person is negligent when he or she fails to act
as a reasonable prudent person under the
circumstances.
Duty of Care
 A landowner is not only held to the duty of
common prudence in maintaining trees on his
property, but is also held to an even greater
duty of inspection to discover possible defects of
a tree in order to prevent it from falling and
injuring others. If risk cant be eliminated, it
should be mitigated so that acceptable level of
risk is achieved.
In Defense of Trees
Risk Rating
The benefit$ of trees?
 Carbon sequestration
 Oxygen
 Erosion Control
 Aesthetics
 Energy Conservation
 Storm Water Interception
 Pollution Control
 Quality of Life
Annual Benefits
 $51 total benefits
 1,438 gallons of
stormwater
 Conserve 35.2
Kilowatt-hours
 320 pounds of CO2
In Defense of Trees
In Defense of Trees
Thanks!
Josh Behounek
Josh.Behounek@davey.com
573-673-7530
@treesrtheanswr
Paul Johnson
pjohnson@tfs.tamu.edu
210-494-4771
@treevangelist

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In Defense of Trees

  • 1. In Defense of Trees BY: JOSH BEHOUNEK & PAUL JOHNSON
  • 2. ISA Pledge I pledge as an ISA Certified Arborist to: Adhere to the Code of Ethics, Comply with all accepted professional standards, Deliver safe & competent services with objective & independent professional judgment, Disclose potential conflict of interest, and Follow appropriate health & safety procedures to protect clients, employers, employees, and the public.
  • 3. The Tree.. Green ash Fraxinus pennsylvanica 16 dbh Street Tree
  • 5. I speak for the trees
  • 6. Negligence A person is negligent when he or she fails to act as a reasonable prudent person under the circumstances. Duty of Care A landowner is not only held to the duty of common prudence in maintaining trees on his property, but is also held to an even greater duty of inspection to discover possible defects of a tree in order to prevent it from falling and injuring others. If risk cant be eliminated, it should be mitigated so that acceptable level of risk is achieved.
  • 9. The benefit$ of trees? Carbon sequestration Oxygen Erosion Control Aesthetics Energy Conservation Storm Water Interception Pollution Control Quality of Life
  • 10. Annual Benefits $51 total benefits 1,438 gallons of stormwater Conserve 35.2 Kilowatt-hours 320 pounds of CO2