نتایج جستجو برای: natural forest

تعداد نتایج: 576922  

Journal: :Revista de biologia tropical 2012
M Mohitul Hossain

The destruction of natural forest is increasing due to urbanization, industrialization, settlement and for the agricultural expansion over last few decades, and studies for their recovery need to be undertaken. With this aim, this comparative study was designed to see the effects of deforested soil on germination and growth performance of five different tree species. In the experiment, five spe...

2017
Tibor Magura Gábor L Lövei Béla Tóthmérész

Most edges are anthropogenic in origin, but are distinguishable by their maintaining processes (natural vs. continued anthropogenic interventions: forestry, agriculture, urbanization). We hypothesized that the dissimilar edge histories will be reflected in the diversity and assemblage composition of inhabitants. Testing this "history-based edge effect" hypothesis, we evaluated published informa...

Journal: :جنگل و فرآورده های چوب 0
الهه علی بابایی عمران دانشجوی کارشناسی ارشددانشگاه تهران مهدی قربانی استادیار دانشگاه تهران محمدرضا مروی مهاجر استاد دانشگاه تهران محمد عواطفی همت استادیار دانشگاه تهران

forest management as one of the important source of production is crucial and critical. in taking over the forest resources as one of the most important of natural resources in the world, it is essential to consider local stakeholders to implement forest action plan for forest co-management. therefore, this study aims at achieving to proper management of forests based on evaluating the stakehol...

جعفرزاده, علی اکبر, مهدوی, علی, میرزایی زاده, وحید, کرمشاهی, عبدالعلی,

In order to optimize the planning and management of natural resources and the environment, it is essential to know the status of land cover changes over the past decades. Modeling land cover change can provide valuable information for better understanding of this process, determining of effective factors and forecasting of regions subject to change. This study aimed to determine and simulate th...

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...

2017
Diego Pizzeghello Ornella Francioso Giuseppe Concheri Adele Muscolo Serenella Nardi Miroslava Mitrovic

Soil carbon sequestration is strongly affected by soil properties, climate, and anthropogenic activities. Assessing these drivers is key to understanding the effect of land use on soil organic matter stabilization. We evaluated land use and soil depth influencing patterns of soil organic matter stabilization in three types of soil profiles located under the same pedogenetic matrix and alpine co...

2013
David L. A. Gaveau Mrigesh Kshatriya Douglas Sheil Sean Sloan Elis Molidena Arief Wijaya Serge Wich Marc Ancrenaz Matthew Hansen Mark Broich Manuel R. Guariguata Pablo Pacheco Peter Potapov Svetlana Turubanova Erik Meijaard

Combining protected areas with natural forest timber concessions may sustain larger forest landscapes than is possible via protected areas alone. However, the role of timber concessions in maintaining natural forest remains poorly characterized. An estimated 57% (303,525 km²) of Kalimantan's land area (532,100 km²) was covered by natural forest in 2000. About 14,212 km² (4.7%) had been cleared ...

A. Parsakhoo M.A. Eshaghi Sh. Shataee Joybari

Helicopter landing sites in proximity to the forest fire-risk zones are necessary for the delivery of supplies and fire emergency response teams. In this paper, we initially prepared forest fire risk map using Random Forest algorithm by overlaying the effective factors on fire occurring including vegetation types, physiographic, climatic and human factors. Then, three variants of natural candid...

2009
Sándor F. Tóth Robert G. Haight Stephanie A. Snyder Sonney George James R. Miller Mark S. Gregory Adam M. Skibbe

College of Forest Resources, University of Washington, Box 352100, Seattle, WA 98195, United States USDA Forest Service, Northern Research Station, 1992 Folwell Ave., St. Paul, MN 55108, United States c School of Forest Resources, Penn State University, 203 Forest Resources Bldg., University Park, PA 16802, United States Department of Natural Resources and Environmental Sciences, University of ...

2014
Denys Yemshanov Frank H. Koch Bo Lu Barry Lyons Jeffrey P. Prestemon Taylor Scarr Klaus Koehler

a Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, ON P6A 2E5, Canada b USDA Forest Service, Southern Research Station, Eastern Forest Environmental Threat Assessment Center, 3041 Cornwallis Road, Research Triangle Park, NC 27709, USA c USDA Forest Service, Southern Research Station, 3041 Cornwallis Road, Research Triangle...

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