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x <br /> good health with mimimal structural damage. These native oaks are resilient <br /> and generally free of harmful pests. Some normal loss of limbs occurs with- <br /> out serious consequences. Root crown rot is the most typical structural <br /> defect contributing to the loss of trees and excessive water - sprouting can <br /> indicate decline. <br /> The Douglas Firs that grow in the .rhododendron garden are generally vigorous; <br /> however, occasional loss occurs. Recently drought and compaction over root <br /> zones have compounded stress in some fir trees and an infestation of beetles <br /> has completed the disruption of fluids and resulted in loss of these trees. <br /> An increase in the beetle population will result in further decline and tree <br /> loss. <br /> In addition to structural defects and insect infestation, the forested area <br /> of the park is in poor condition. Overcrowded stands of regrowth tree are <br /> weak. The broken tops of many trees are examples of structural damage. <br /> Moreover, the proliferation of English ivy and other weeds and uncontrolled <br /> water runoff continue to threaten the survival of trees in this area of the <br /> park. <br />