262 results on '"FOREST management"'
Search Results
252. Forest research in the north -the province of Åland.
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FORESTS & forestry , *TREES , *FOREST management , *SILVICULTURAL systems , *RESEARCH - Abstract
Reports on forest research in the province of Aland, a group of islands between Sweden and the mainland of Finland which is a demilitarized, Swedish-speaking part of Finland with a wide degree of autonomy. Regional forest program with the goal of ensuring sustainable economic, ecological and social development of the forest resources; Statistical data on Aland's forests.
- Published
- 2005
253. Perspectives on development of definitions and values related to old-growth forests.
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Frelich, Lee E and Reich, Peter B
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FORESTS & forestry , *NATURAL resources , *TREES , *FOREST management - Abstract
Old-growth forests are those that meet some threshold(s) determined by a scientific and political process. The main issue is what criteria to use to determine these thresholds; they must be practical enough to allow managers to delimit and manage old-growth stands in the field. People value forests with old and (or) big trees and primary forests that have a continuous heritage of natural disturbance and regeneration, even though the latter may include all stages of stand development and succession. We advocate uniting these two and using "primary forest", also called "natural heritage forest", as the criterion for delimiting old growth in regions where primary forest still exists. This criterion recognizes that the stage of development with big, old trees is part of a cycle of development, and it is necessary to have all the parts to continue to produce new examples of the older stages. The best available second-growth stands can be used in regions where primary forests are not available. Alternatively, threshold criteria for delimiting old growth can be based on tree size and age, but arbitrary criteria based on human size and age scales should be avoided in favour of criteria that specify stands dominated by trees relatively large and old for the species and site. Such criteria allow for old growth to occur across a variety of levels of site productivity, with trees of widely varying stature and with varying life-history characteristics, such as longevity, shade tolerance, and successional status. In any case, managers and scientists should work together to make sure that definitions work in the field but also include the ecological processes necessary to maintain the unique biological resources of old growth. The biological resources present in old growth may help to restore the second-growth landscape and allow reconstitution of forests in new places after global warming. Old-growth forests provide a baseline for comparison of effects of logging and natural disturbance, with respect to resilience to climatic change and disturbance, maintenance of species richness, and natural genetic structure of tree populations, which respond to different selective regimes in old growth and harvested forests. The species in old-growth remnants, their interactions and the resilience of the system after disturbance are as important or perhaps more so than the age and size of the trees at a given point in time. Key words: dwarf forest, Minnesota, old-growth processes, tree height.Les vieilles forêts sont celles qui rencontrent un ou des seuils déterminés par un processus scientifique ou politique. Le défi est de déterminer quels critères utiliser pour déterminer ces seuils; ils doivent être assez pratiques pour permettre aux aménagistes de délimiter et d'aménager les vieux peuplements sur le terrain. Le public valorise les forêts avec des arbres âgés ou de fortes dimensions, ainsi que les forêts primaires avec une histoire ininterrompue de perturbations naturelles et de régénérations. Nous proposons d'unir ces deux approches en utilisant le terme « forêt primaire » encore appelée « forêt patrimoniale naturelle », comme critère pour délimiter les vieilles forêts dans les régions où la forêt primaire existe toujours. Ce critère reconnaît que le stade de développement avec de gros arbres anciens constitue une partie du cycle de développement, et qu'il est nécessaire de disposer de toutes les parties du cycle pour continuer à produire de nouveaux exemples des stades les plus âgés. On peut utiliser les meilleures forêts de seconde venue, dans les régions où la forêt primaire n'existe plus. Comme alternative, les critères de seuil pour délimiter les vieilles forêts peuvent être basés sur la dimension et l'âge, mais les critères empiriques déterminés sur la base de dimension et d'âge à l'échelles humaines devraient être évités en faveurs de critères qui visent des peuplements dominés par des arbres relativement gros et âgés pour l'espèce et pour le site. De tels critères permettent de repérer des vieilles forêts pour un ensemble de niveaux de productivité des sites, avec des arbres de statures très variées, avec des caractéristiques variées de cycle de vie, tels que la longévité, la tolérance à l'ombre, et la place dans la succession. En toute éventualité, les aménagistes et les scientifiques devraient travailler ensemble pour s'assurer que les définitions sont utilisables sur le terrain, mais tiennent également compte du processus écologique nécessaire pour maintenir les ressources uniques de la vieille forêt. Les ressources biologiques présentes dans les vieilles forêts pourraient permettre de restaurer le paysage de seconde venue et de reconstituer des forêts en de nouveaux endroits, suite au réchauffement global. Les vieilles forêts fournissent une ligne de base pour comparer les effets à long terme de la récolte et des perturbations naturelles, en tenant compte de la résilience au changements de climat et de la perturbation, du maintient de la richesse en espèces, et de la richesse de la structure génétique des populations d'arbres, en réaction aux différents régimes sélectifs appliqués aux forêts âgées ou récoltées. Les espèces des vieilles forêts vestigiales, leurs interactions, et la résilience du système après perturbation sont aussi importantes, et peut-être plus importantes, que l'âge et la dimension des arbres, à un moment donné dans le temps. Mots clés : forêt naine, Minnesota, processus de vieillissement forestier, hauteur des arbres.[Traduit par la rédaction] [ABSTRACT FROM AUTHOR]
- Published
- 2003
- Full Text
- View/download PDF
254. IN A RACE AGAINST TIME, MICHAEL STEWARTT TAKES WING ON AN AERIAL MISSION TO SAVE AMERICA'S VANISHING FORESTS.
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Abrahams, Andrew and Young, Stanley
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RACIAL differences , *SEARCH & rescue operations , *MILITARY missions , *FOREST management , *NATURAL resources management - Published
- 1990
255. Growing better trees.
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FOREST management , *FORESTS & forestry , *FORESTRY innovations , *PRUNING , *FOREST thinning , *TREES - Abstract
Observes how the new forestry specialty of trimming and pruning young trees could help revitalize the timber-dependent economy of the United States Pacific Northwest. Advantages of the procedure over the common practice of planting; Recommendations for policy makers in the region.
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- 1991
256. Protecting our forests should be a top economic priority.
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Harrington, Bob
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FOREST protection , *FOREST conservation , *TREES , *FOREST management , *FOREST restoration , *ECONOMICS - Abstract
The article explores the importance of trees as well as notes the implication of proper care of forests. It notes that righting the exploitation to trees could lead to positive environment-related outcomes including climatic change prevention and improvement on air quality and water supply. Moreover, forest conservation efforts may also lead to development in a nation's economic activity.
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- 2009
257. Race to protect WA's last tuarts from extinction.
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TREES , *ENVIRONMENTAL protection , *EXTINCTION of plants , *BIOLOGICAL extinction , *CONSERVATION of natural resources , *FORESTS & forestry & the environment , *FOREST management - Abstract
The article reports on a three-year study on the cause of slated extinction of native tuart trees at the Ludlow Tuart Forest National Park in Western Australia by Paul Barber of Tuart Health Research Group at the Murdoch University. The state has been considered the only place on earth where such trees grow; thus, their slated extinction is feared of. Study shows that tuart forests have declined at about 110,000 to 30,000 hectares, beginning in 1990s. Barber found out that despite the drought and insects, the cause was due to the lack of fine root mass that has led to less mycorrhizal pads, which are considered the beneficial fungi that help the tree nourish itself with nutrients and water. To address such problem, replanting has been done through a seed collection program.
- Published
- 2007
258. MORE COMPLETE THINNINGS NEEDED.
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FOREST thinning , *PRESCRIBED burning , *WILDFIRES , *TREES , *MORTALITY , *FOREST management , *FORESTS & forestry - Abstract
The article states that two recent studies by the U.S. Forest Service on the effects of major wildfires showed that forests that were thinned but not treated with prescribed burning suffered much greater tree mortality than forests that were thinned and prescribe-burned or forests that were not treated at all. The studies focused on the 2002 Biscuit fire in Oregon and the 2002 Hayman fire in Colorado. They showed that in the Biscuit fire, 80 to 100 percent of the trees died in forests that had only been thinned, while 5 percent of the trees died in forests that had been thinned and prescribe-burned. In the Hayman fire, 90 percent of the trees died in a forest that had only been thinned, while 50 percent of the trees died in an untreated or natural forest.
- Published
- 2007
259. BLAZES MAY PROVE A GOOD THING.
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WILDFIRES , *FOREST management , *FIRES , *FOREST ecology , *WILDFIRE prevention , *REMNANT vegetation , *TREES - Abstract
The article focuses on the summer wildfires of Idaho. Forest managers in Idaho told the Associated Press that fires followed historic patterns that will aid forest ecology that's been destabilized after more than a century of fire suppression. The fires burned more than 800,000 acres in the state but destroyed only a few homes. Since the fires burned at different temperatures, the forest remnants they left vary in age, from old growth to young trees. The resulting variety of trees will help protect the forest from disease and insects
- Published
- 2006
260. SUSTAINABLE MANAGEMENT NOT BEING SUSTAINED.
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FOREST management , *SUSTAINABLE forestry , *FORESTS & forestry , *TIMBER , *RAIN forests , *TREES , *HUMAN ecology - Abstract
This article states that efforts to sustainably manage the world's rainforests are falling short, according to a new report by the International Tropical Timber Organization. The total area of tropical timber under sustainable management has grown from less than 10,000 square kilometers in 1988 to 360,000 square kilometers at present. However, according to the report a large gas exists between sustainable management plans and their actual implementation. Tropical countries have drawn up management plans for a quarter of the total area designated as production forests, but just seven per cent of the total area is actually being managed sustainably.
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- 2006
261. The True Value of Forests.
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Gangloff, Deborah
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FOREST management , *ASSOCIATIONS, institutions, etc. , *EROSION , *AIR quality , *TREES - Abstract
Discusses several programs proposed by the American Forests organization aimed to promote the value of trees and forest management in the U.S., as of January 2005. Criticisms against the traditional focus of forest management initiatives in the country; Benefits of demanding that forest management should protect and grow the total value of forests, including less erosion and cleaner air; Consequences of the failure to recognize financial and ecological benefits from trees.
- Published
- 2005
262. Ohio Turns Trees Into Supplies For Poor School Districts.
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SCHOOL supplies , *TREES , *FOREST management , *SCHOOL districts - Abstract
Reports on the funding of school supplies for the poorest school districts in Ohio through the state's Trees to Textbooks forest management program. Reason for subsidizing schools through the sales of timber from state and federal lands; Other beneficiaries of state timber sales.
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- 2002
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