5300 GLENWOOD AVE 2017-01-13 - Laserfiche WebLink

n � within the canopy of the tree, disease may be indicated by leaf blight, stem canker, fungal growth or insect and bird activity. Trees produce adaptive growth to compensate for the stress related to growth and injury. The shape and formation of limbs and trunks can reveal the ability of the tree to compensate for weakness or indicate internal problems that may lead to limb or trunk breakage. The interpretation of these changes in form is part of a growing body of knowledge pioneered in Europe and adopted across the globe. The knowledge is not new but the application of that knowledge in risk assessment is in the forefront of progress in understanding how trees compensate for stress. Research into stress-loading of trees and materials testing of wood structure has led to the development of systems of structural evaluation based on the principals of bio-engineering. Observations Fifty trees were identified and marked with flagging by representatives of the community. These trees are all of a single species; Red Alder (Alnus rubra) the majority of the trees (forty one) are located behind units F, G, H, I, J and K; the remaining nine trees were located behind units N and O. The approximate location of the trees is shown on the sketch plan. The concern about the trees is in part related to the proximity of the trees to the residences and previous incidents of tree failure in which trees have failed and caused damage. Red Alder are a pioneer species typically populating areas that have been opened up by the removal of overstory trees. Their role is to fix nitrogen in the soil and provide a suitable environment for successional trees with longer life cycles. As such Alder grows rapidly and is relatively short lived, typically attaining Villas at Glenwood Terrace Tree Risk Assessment Robert W. Williams Consulting Arborist 5