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14 Cards in this Set
- Front
- Back
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Main contributors and % of forest health losses |
-disease (60%) -insects (20%) -fire (20%) |
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Historical perspective of forest health: -1912 -1914 -1949 -1985 |
-1912: first chief foresters HR MacMillan -1914: first survey, roles of federal and provincial gov't established -1949:collections and sampling -1985: FIDS survey |
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3 average annual depletion factors and their % |
-harvest (70%) -pests (28) -fire (2%) |
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types of pest caused losses and % (6) |
-decay (20%) -root disease (20% -vegetation compensation (20%) -bark beetles (15%) -defoliators (15%) -dwarf mistletoe (10%) |
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loss of timber resources impacts (3) |
-fibre -plantation success -free growing status |
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loss of non timber resources impacts (5) |
-visual/aesthetic -recreational -human health -wildlife -wilderness |
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issues with aerial overview for detecting forest health issues because there are flown to high (3) |
-cant detect root disease -foliar diseases are typically lower on live crown -pine stem ruts are in regenerated stands |
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define forest pathology |
the study of forest diseases for the purpose of predicting, and preventing or minimizing damage |
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define forest entomology |
studying forest insects, their physiology and life cycles, to better understand how to control outbreaks and manage population levels |
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historical view of protecting forest health included |
-preventing trees from deteriorating or burning before they could be harvested |
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current view of forest health |
-a forest ecosystem of healthy when its ecological processes are working well and it can handle disturbances |
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beneficial role of insects are (6) |
-bio control -pollinators -food -scavengers and decomposers -medical and scientific values -aesthetic |
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the outcomes of controlling natural disturbances include (3) |
-fire protection -forest reserves -insect and disease control activities |
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a healthy forest is/has (7) (TVDSAWI) |
1. trees vigorous and healthy 2. vegetation diversity in balance with site potential 3. tolerate and recover from disturbances 4. soil erosion minimal 5. aquatic species diverse and abundant 6. wildlife diversity and abundant 7. insect, disease and fire in normal ranges
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