نتایج جستجو برای: natural forest
تعداد نتایج: 576922 فیلتر نتایج به سال:
Long-range regional projections of the changes in forest type areas are important in public and private forest resources planning. The combination of natural forces and human activities, which are shaped by socioeconomic forces such as population and income trends, has led to striking changes in forest cover types for the three major types of private owners. A model for the U.S. Southeast is pr...
JOHN A. STANTURF1, BRIAN J. PALIK2, MARY I. WILLIAMS3, R. KASTEN DUMROESE4, and PALLE MADSEN5 1Center for Forest Disturbance Science, Southern Research Station, U.S. Forest Service, Athens, Georgia, USA 2Center for Research on Ecosystem Change, Northern Research Station, U.S. Forest Service, Grand Rapids, Minnesota, USA 3School of Forest Resources and Environmental Sciences, Michigan Technologi...
Nacrtak Model development and use play a significant role in research and forest management of Slovenian forests. As co-natural and sustainable forest management is traditional, it is essential to rely on available knowledge of the composition of natural plant associations. This paper describes the need for stumpage price modelling, and the basic concept of developing models which can behave dy...
in this research with using of obtained information from a natural fraxinus the variation of quantities and qualitative measures of current stand in an 8 year period was conducted in chelir part of kheyroud forest. data collection was conducted by full callipering method in two periods of 1384 and 1392. during the period of study the parameters of dominant mean height and relative crown height ...
Optimized forest degradation model (OFDM): an environmental decision support system for environmental impact assessment using an artificial neural network Ali Jahani, Jahangir Feghhi, Majid F. Makhdoum & Mahmoud Omid a Environment and Natural Resources Sciences Department, University of Environment, Karaj, Iran b Department of Forestry and Forest Economic, Faculty of Natural Resources, Universi...
Forest exploitation in British Columbia is currently unsustainable. Economic analysis is frequently used to justify the high rate of cut by documenting the revenue, job and wage benefits of current industrial forestry. However, Hicks’ definition of income implies that it is poor accounting practice to count the consumption of natural capital as income. Yet in BC, economic analysis fails to make...
Since warning of the global warming by carbon dioxide, the biomass distribution of forest has been concerned and its study has been requested. Much expectation has focused on the remote sensing corresponding to wide area. We noticed small area and estimated the spatial distribution of the forest volume using the actual GIS and remote sensing data. We comprehended the spatial distribution of the...
A large carbon sink in northern land surfaces inferred from global carbon cycle inversion models led to concerns during Kyoto Protocol negotiations that countries might be able to avoid efforts to reduce fossil fuel emissions by claiming large sinks in their managed forests. The greenhouse gas balance of Canada's managed forest is strongly affected by naturally occurring fire with high interann...
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