08-18-1979 Planning Packet - Laserfiche WebLink

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APR 04 '97 10:04 hM TRAVELlJA'i-S P.6-IZ TPFF PttFSFRVATtON POLICY CITY OF ORONO Technical Terms: APPENDIX A Cambium- The tissue within the woody portion of trees and shnibs which gives rise to the woody water and nutrient conducting system, and the energy substrate transport system m trees Cambial dieback: The irreparable radial of vertical interruption of a tree’s cambium, usually d by mechanical damage, such as "skinning bark", or from excessive heat.cause Coitiferous Belonging to the group of cone-bearing evergreen trees or shrubs. Deciduous- Not persistent; the shedding ofleaves annually. Feeder roots A complex system of small annual roots growing outward and predominantly upward from the system of "transport roots" These roots branch four or more times to form fans or mats ot thousands ot fine, short, non-woody tips, ^y o these small roots and their multiple tips are 0 2 to Inun or less in diameter, and l«s than 1 to 2mm long. These roots constitute the major fraction of a tree’s root system surface area, and are the primary- sites of absorption of water and nutrients. Major Woody Roots Fiist order tree roots on^nafmg at the "root collar" and growmg horizontally in the soil to a distance of between 3 and 15 feet from the tree s tru es- roois branch and decrease in diameter to give rise to "rope roots’’. The pnm^ frmction of major woody roots include anchorage, structural support, the storage of tood reserves, and the transport of minerals and nutrients. Protected Root Zone; The rooting area of a tree established to limit root disturbances. Tliis zone is generally defined as a circle with a radius extending from a tree s to ^ point no less than the furthest crown dripline Disturbances within tbs zone will directly affect a tree’s chance for survival . Root Collar: The point of attachment of major woody roOts to the tree trunk, usually at or near the groundline and associated with a marked swelling of the tree trunk. Root Respiration. An acUve process occurring throughout the feeder root system of trees, and involving tlie consumption of ox7gen and sugars with the release of energy carbon-dioxide. Root respiration facilitates the uptake and transport ot minerals an nutrients essential for tree survival.