摘要: Abstract A tree dies when it is unable to mobilize sufficient resources internally, or obtain additional through leaves and roots sustain life heal injuries. Although stress of any kind affects the availability water, nutrients, photosynthate, we can judge a tree's probability dying by assessing: (1) reduction in photosynthesis, (2) adjustments maintenance costs, (3) diversions photosynthate away from expected growth patterns. Examples are provided for trees subjected drought, mechanical abrasion, nutrient stress.
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