Glossary: V

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Term Definition French
Value-added product A product that has had value added to it through further processing. Examples include windows, doors, kitchen cabinets, flooring and mouldings. Value-added pulp and paper products include items such as packaging, diapers, coated papers, tissue, business papers, stationery and other consumer paper products. Produit à valeur ajoutée
Variable-retention A silvicultural system that follows nature’s model by always retaining part of the forest after harvesting. Standing trees are left in a dispersed or aggregated form to meet objectives such as retaining old-growth structure, habitat protection and visual quality. Variable retention retains structural features (snags, large woody debris, live trees of varying sizes, canopy levels) as wildlife habitat. Rétention variable
Variety Subdivision of species, a group of individuals that have common characteristics (example : The different varieties of apples). Variété
Variety Specifically within forestry, any clone or product of breeding given a separate name. Variété
Vector Any DNA-containing structure that is used to transfer DNA into an organism. The most commonly used vectors are plasmid DNA and bacteriophages or other viruses. Vecteur
Vegetative propagation Reproduction by other than sexually produced seed. Includes grafting, budding, rooting of cuttings, and tissue and cell culture, including embryogenesis. Multiplication végétative
Venation Distribution of veins on the wings of an insect or on a leaf. Nervation
Veneer A thin layer of wood (usually wide and long) prepared by peeling or slicing a log. Feuilles de placage
Vertical diversity The diversity in a stand that results from the complexity of the above-ground structure of the vegetation. Diversité verticale
Vertical structure The structure formed by different layers of vegetation in a forest. Structure verticale
Vesicle Small, bladder-like structure. Vésicule
Vestigial Organ that is diminished in size and often nonfunctional. Vestigial
Viability Of a seed, spore, or pollen grain, its capacity to germinate and develop, under given conditions. Viabilité
Vigor class Assumption of the health of a tree based on observation of the foliage. Classe de vigueur
Virgin forest Natural forest, the development of which has been virtually uninfluenced by modern human activity. Forêt vierge
Virulence Measure of a pathogen's ability to multiply in a living organism and harm it. Virulence
Viruses Primitive microorganisms that must infect the living cells of animals, plants, or bacteria in order to replicate. When outside the host cells, viruses adopt a form consisting, most of the time, of a RNA or DNA molecule surrounded by a protein matrix. Virus
Viviparous Bringing forth living, fully formed individuals that are capable of feeding. Said of producing bulbils on young plants, instead of and in place of flowers. Vivipare
Volume-based tenures They allow licensees to harvest specific volumes of timber from a broadly defined area. Several licensees can hold such rights within the same area. The provincial regulatory agency is usually responsible for management planning, but tenure holders may be obliged to assume forest management responsibilities. Tenures fondées sur le volume
Volunteer growth Natural regeneration following site preparation and seeding or planting that could either supplement or completely obscure the trees being planted or seeded on the area. Régénération subséquente
Volva Cup-like sheath surrounding the stem base in some fungi, eg, Amanita; it is a remnant of the universal veil. Volve
Vulnerable species A species that is considered at risk because it exists in low numbers or in restricted ranges, due to loss of habitat or other factors. Espèce vulnérable
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