Urban Forest - Conference 2009 (A3)

download Urban Forest - Conference 2009 (A3)

of 21

  • date post

    14-May-2015
  • Category

    Technology

  • view

    995
  • download

    2

Embed Size (px)

description

Session A3 - ARPA 2009 Conference

Transcript of Urban Forest - Conference 2009 (A3)

  • 1.The State of the Urban Forest:Whats a Tree Worth?Milton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristTrees & Us Trees are big plants Trees are part of our landscape Trees are part of our heritage Trees are part of our Big PictureTrees FlowersTurf Shrubs People Families PeopleTrees Shrubs TurfMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting Arborist Trees & Us - Why do we plant trees? Trees deflect noise & wind Trees block unwanted views Trees limit erosionMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristMilton Davies, C.E.T., R.P.F.Page 1Professional Urban Forester & Consulting Arborist

2. Trees & UsWhy do we plant trees? Trees are important Trees provide shade Trees provide oxygen Trees filter our airMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristU of A QuadMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristU of A Quad Admin Bldg.Milton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristMilton Davies, C.E.T., R.P.F.Page 2Professional Urban Forester & Consulting Arborist 3. U of A QuadMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristU of A QuadMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting Arborist So whats a tree worth?Edmontons Tree Values Natural Tree Stands Shelterbelts Ornamental Trees Edmontons ornamental elmtrees have an assessed valueof $464 Million, with a totalornamental tree inventoryvalue of $1.7 Billion.Milton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristMilton Davies, C.E.T., R.P.F.Page 3Professional Urban Forester & Consulting Arborist 4. So, whats a tree worth? So, whats a tree worth?Milton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristHow Does a Tree Grow? A tree grows in layers. A tree grows like dipping a candle. Every layer coats the last. This includes the trees root system.Dr. Alex ShigoMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristMilton Davies, C.E.T., R.P.F.Page 4Professional Urban Forester & Consulting Arborist 5. Tree Anatomy 101 epidermiscortexcambiumxylemphloempithMilton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Tree Physiology Become aware of trees and their biology sapwoodgrowth heartwood rings barkn ioalct ntisege nd ialtansectio ra Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist How A Tree Works The Root System Transpiration Effects of construction damageFrom Stupsi by Dr. Claus Matthech Milton Davies, C.E.T., R.P.F.Page 5 Professional Urban Forester & Consulting Arborist 6. Tree Theory1. Branches & Leaves (Canopy)2. Stem3. Root Plate4. Transport & Feeder Roots Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist The Wind & TreesFrom Stupsi by Dr. Claus Matthech Understanding Trees as Structures Wind Direction Stability ProblemsFrom Stupsi by Dr. Claus Matthech Milton Davies, C.E.T., R.P.F.Page 6 Professional Urban Forester & Consulting Arborist 7. The Wind & TreesFrom Stupsi by Dr. Claus Matthech Buttress Roots Buttress roots on thewindward side Cutting Buttress rootcan cause tree to falloverFrom Stupsi by Dr. Claus Matthech Infrastructure Construction Damage WaterlinesFrom Stupsi Gas Linesby Dr. Claus Matthech Curbs Sidewalks Other Utility Installation & Repair Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 7 Professional Urban Forester & Consulting Arborist 8. Tree Roots & Construction Transport & Feeders 85% in the top 45 cm Oxygen deprived environment Root damage Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting ArboristPreserve & Protect Our Trees Trees are twice as large as they appear Construction - damage below ground Mortality Spiral & Tree death Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting ArboristTrees & Sidewalk Problems Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 8 Professional Urban Forester & Consulting Arborist 9. Root PruningDr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, GainesvilleConstruction Caused Tree Failure Root Plate Damage Failed Trees Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting ArboristTree Failures Root Plates Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 9 Professional Urban Forester & Consulting Arborist 10. Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist The Consulting ArboristConsulting Arborists are the Experts ExpertsAuthoritative advice for: Arborists Businesses Municipal government Government agencies Organizations Homeowners Developers Insurance companies Lawyers Related green industry professionals Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist The Consulting ArboristOur Expertise Reaches Beyond Pruning Names and characteristics of trees and plant life Common pests that might damage trees Strategies for planting and maintaining Investigative skills Expert witness capabilities Hazard tree evaluation Diagnosis of plant/tree problems Plant inventories Appraisal Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 10 Professional Urban Forester & Consulting Arborist 11. The Consulting ArboristOur Capabilities are as Varied as Species of Trees Investigative damage Provide testimony Conduct appraisals Evaluate environmental impact of development Manage long-term planting and maintenance strategies Consult on tree planning, preservation and evaluationMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting Arborist The Consulting ArboristComplex Situations Call for Consulting Arborists Legal or environmental matters Preservation Appraisals Damage EducationMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristThe Consulting ArboristMilton Davies, C.E.T., R.P.F.Professional Urban Forester & Consulting ArboristMilton Davies, C.E.T., R.P.F.Page 11Professional Urban Forester & Consulting Arborist 12. Planting Too Deep Or Too Much Fill From Stupsiby Dr. Claus MatthechSolutions Trees too close to the walkDr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, GainesvilleSolutions Locate trees on other side of wallDr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, Gainesville Milton Davies, C.E.T., R.P.F.Page 12 Professional Urban Forester & Consulting Arborist 13. Solutions Hardscape overkill & over planting New trees were not needed here. Large healthy trees exist several feet behind.Dr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, GainesvilleSolutionsLocate trees away from walk Damage is lesslikely when treesare located farfrom the walkDr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, GainesvilleSolutionsRe-routing walk around tree Sidewalks - re-routed around large tree trunks This eliminates the need to prune roots that caused the walk to lift Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 13 Professional Urban Forester & Consulting Arborist 14. Solutions Re-routing walk around tree Same tree, different view Sacramento, CA Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting ArboristSolutionsRe-routing walk around tree Re-routing walks around existing trees does not solve the problem if large (> 1 in diameter) roots are cut causing the tree to die. Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting ArboristSolutions Sidewalks and trees Milton Davies, C.E.T., R.P.F. Professional Urban Forester & Consulting Arborist Milton Davies, C.E.T., R.P.F.Page 14 Professional Urban Forester & Consulting Arborist 15. SolutionsTree in wrong location Locate trees on the site so they have access to the most soil space. The dead tree on the right could have been placed in the lawn area on the left.Dr. Edward F. Gilman, professorDepartment of Environmental HorticultureUniversity of Florida, GainesvilleSolutions Tree grates in downtown landscapesTree grates have been used around the base of trees in downtownbusiness districts Present a level surface forpedestrians whilepreventing soil compaction Keep in place the soil,mulch, or gravel around thebase of trees They are a short termsolution for landscapesmeant to be replaced about Dr. Edward F. Gilman, professorevery 15 years Department of Environmental Horticulture University of Florida, GainesvilleSolutionsTree grates in parks Tree grates (arrow) areless appropriate in parksettings like this. If trees survive it islikely to be damaged orvandalized. If they grow poorly thewalk remains intact.Dr. Edward F. Gilman, professor Department of Environmental Horticulture University of Florida, Gainesville Milton Davies, C.E.T., R.P.F.Page 15 Professional Urban Forester & Consulting Arborist 16. SolutionsHardware overload Thousands of dollars were spent on hardscape. Unfortunately, while trees of an appropriate species was chosen, exceptionally poor-quality nursery stock was selected.Dr. Edward F. Gilman, professor Department of Environmental Horticulture University of Florida, Gainesville SolutionsMore hardware overload Root growth - no chance ofsuccess unl