نتایج جستجو برای: forest range

تعداد نتایج: 766089  

2011
Catherine I Cullingham Janice E K Cooke Sophie Dang Corey S Davis Barry J Cooke David W Coltman

The current epidemic of the mountain pine beetle (MPB), an indigenous pest of western North American pine, has resulted in significant losses of lodgepole pine. The leading edge has reached Alberta where forest composition shifts from lodgepole to jack pine through a hybrid zone. The susceptibility of jack pine to MPB is a major concern, but there has been no evidence of host-range expansion, i...

2003
JAMES H. MILLER MICHAEL NEWTON

Miller, J.H. and Newton, M., 1983. Nutrient loss from disturbed forest watersheds in Oregon’s Coast Range. Agro-Ecosystems, 8: 153-167. Dissolved nutrients were monitored bi-weekly in stream water draining 14 upland watetzhcds in Oregon’s Coast Range after sprayin g with 2,4:5-T + 2,4-D, clrarcut harvesting and slash burning. Anion generation and leaching were primarily studied. The nitrate con...

Journal: :Bulletin of environmental contamination and toxicology 1976
L A Norris M L Montgomery W L Webb H J Schroeder F Gross

Logan A. Norris', Marvin L. Montgomery 2 , Warren L. Webb3, Henry J. Schroeder, Jr. 3, and Fred Grosso 'Pacific Northwest Forest and Range Experiment Station Forest Service, U.S. Department of Agriculture Corvallis, Ore. 97331 'Department of Agricultural Chemistry 'Department of Forest Management Oregon State University Corvallis, Ore. 97331 °Bonneville Power Administration U.S. Department of t...

2013
Michael T Ter-Mikaelian Stephen J Colombo Jiaxin Chen

Carbon stocks in managed forests of Ontario, Canada, and in harvested wood products originated from these forests were estimated for 2010-2100. Simulations included four future forest harvesting scenarios based on historical harvesting levels (low, average, high, and maximum available) and a no-harvest scenario. In four harvesting scenarios, forest carbon stocks in Ontario's managed forest were...

Journal: :Remote Sensing 2012
Paul M. Treitz Kevin Lim Murray Woods Doug Pitt Dave Nesbitt Dave Etheridge

Over the past two decades there has been an abundance of research demonstrating the utility of airborne light detection and ranging (LiDAR) for predicting forest biophysical/inventory variables at the plot and stand levels. However, to date there has been little effort to develop a set of protocols for data acquisition and processing that would move governments or the forest industry towards co...

2014
J. Parkman CARTER Jonas BRAASCH

“Measuring” the soundscape is like trying to measure the ocean, the forest, or the city—one dimensional metrics and color-coded maps are inadequate to meaningfully describe the myriad complex conditions, relationships, and effects which comprise the soundscape’s impact upon us, and our impact upon it. In order to better understand the subjective experience of the soundscape, we need new methods...

1999
William J. McShea Peter Leimgruber Myint Aung Steven L. Monfort Christen Wemmer

The thamin (Cervus eldi) is an endangered species of deer whose present range is greatly reduced from its original distribution covering the deciduous forests throughout south-east Asia. We mapped the present distribution of thamin using ground surveys and tied this information to habitat types derived from satellite images in order to detect patterns that might indicate the landscape features ...

2003
RALPH J. ALIG JAMES G. WYANT

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...

2007
Holly K Gibbs Sandra Brown John O Niles Jonathan A Foley

Reducing carbon emissions from deforestation and degradation in developing countries is of central importance in efforts to combat climate change. Key scientific challenges must be addressed to prevent any policy roadblocks. Foremost among the challenges is quantifying nations’ carbon emissions from deforestation and forest degradation, which requires information on forest clearing and carbon s...

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