نتایج جستجو برای: natural forest
تعداد نتایج: 576922 فیلتر نتایج به سال:
investigation on structure and dynamics of natural forest ecosystems is an important issue for silvicultural decisions. the aim of this study is to analysis dynamics and structure of a beech stand during 5-year period in the shast kalateh forest in the caspian region, north of iran. data were collected from a 16.9ha permanent research plot established in a natural unlogged stand in 2006. all li...
15 The endemic pine, Pinus canariensis, forms one of the main forest ecosystems in the 16 Canary Islands. In this archipelago, pine forest is a mosaic of natural stands (remnants 17 of past forest overexploitation) and artificial stands planted from the 1940’s. The 18 genetic makeup of the artificially regenerated forest is of some concern. The use of 19 reproductive material with uncontrolled ...
Sustainable forest management standards and measurement instruments subject and use them as the main tool is very important for monitoring and control in forest management. Sustainable progress monitoring and measuring possible by tools and standards. Tools and standards to help sustainable forest management can be more accurate and better information provided to forest managers and decision-ma...
چکیده ندارد.
Southeast Asia has some of the highest deforestation rates globally, with Malaysia being identified as a deforestation hotspot. The Malayan tiger, a critically endangered subspecies of the tiger endemic to Peninsular Malaysia, is threatened by habitat loss and fragmentation. In this study, we estimate the natural forest loss and conversion to plantations in Peninsular Malaysia and specifically ...
Shifts of functional traits are important because phenotypic responses of species to environmental changes caused by natural and anthropogenic disturbances are fundamental in determining the risk of population extinction. This study tested the effect of forest thinning on the body shape and male genital size of an endemic ground beetle species Carabus masuzoi (Imura and Satô 1989) (Coleoptera,...
Denys Yemshanov ([email protected]), Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, Sault Ste. Marie, ON, Canada Frank H. Koch, USDA Forest Service, Eastern Forest Environmental Threat Assessment Center, Research Triangle Park, NC USA Mark Ducey, University of New Hampshire, Department of Natural Resources and the Environment, Durham, NH USA Manuel Colunga-Ga...
Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, ON P6A 2E5, Canada, USDA Forest Service, Southern Research Station, Eastern Forest Environmental Threat Assessment Center 3041 Cornwallis Road, Research Triangle Park, NC 27709, USA, Department of Natural Resources and the Environment, University of New Hampshire, 114 James ...
The aim of this study is to analyze the effects of forest gaps on the variations of soil properties in Castanopsis kawakamii natural forest. Soil physical and chemical properties in various sizes and development stages were studied in C. kawakamii natural forest gaps. The results showed that forest gaps in various sizes and development stages could improve soil pore space structure and water ch...
Is active restoration the best approach to achieve ecological restoration success (the return to a reference condition, that is, old-growth forest) when compared to natural regeneration in tropical forests? Our meta-analysis of 133 studies demonstrated that natural regeneration surpasses active restoration in achieving tropical forest restoration success for all three biodiversity groups (plant...
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