نتایج جستجو برای: selective felling
تعداد نتایج: 199877 فیلتر نتایج به سال:
Timber harvesting on steep terrain has always been, and will remain, a challenge in terms of economic viability, safety and environmental performance. For almost a century motor-manual felling coupled with cable yarding has been the most appropriate harvesting system, but new technologies and innovations have led to machines and systems being developed that are modernising the way we operate on...
Planting new forests has received scientific and political attention as a measure to mitigate climate change. Large, have been planted in places like China Ethiopia and, over time, billion hectares could become available globally for planting forests. Sustainable management of forests, which are wood production, less despite these covering at least two globally. Better existing would improve fo...
Ecological degradation within areas of remnant forest may be amplified if the effects of fragmentation interact with the effects of other environmental disturbances such as wind storms. We used before-after comparisons to assess the effects of Tropical Cyclone Larry on remnant and continuous rainforest in the Wet Tropics uplands of north-eastern Australia. Vegetation structure was measured thre...
The Onega Peninsula is located in the north-west of Russia Arkhangelsk Region, juts out into White Sea, an area a transitional climate from oceanic to continental temperate climatic zone, belongs central sector northern taiga zone. flora and fauna peninsula are very diverse. A significant part natural complexes highly preserved ideal for biosphere monitoring. In connection with intensive indust...
Abstract Recent outbreaks of the European spruce bark beetle ( Ips typographus ) in Norway Picea abies forests Central Europe highlight importance timely detection and sanitation infested trees for pest management efficacy. This study provides novel quantitative evidence on manifestation infestation symptoms their visual detectability, to guide accelerated, optimized terrestrial monitoring, as ...
The paper analyzes the growth of Pinus sylvestris L. and koraiensis Siebold et Zucc. Bonitet, age, diameter height, density resources were determined on 11 sample plots. analysis state artificial plantations pinus sylvestris, planted from 1954 to 1980, indicates their low preservation, which after 25-40 years, depending location research object, decreases 14-25%, confirms need for expanding rec...
Most tropical forests are government-owned, with timber being harvested under concession agreements awarded to private logging companies. Those agreements tend to be short-term harvesting licenses lasting no more than one to a few years. In the absence of regulation, loggers can be expected to ignore the negative environmental impacts of logging, as they derive little or no financial gain from ...
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