نتایج جستجو برای: distance from forest

تعداد نتایج: 5771037  

2011
Alexandro Caruso Jörgen Rudolphi Håkan Rydin

Biological edge effects are often assessed in high quality focal habitats that are negatively influenced by human-modified low quality matrix habitats. A deeper understanding of the possibilities for positive edge effects in matrix habitats bordering focal habitats (e.g. spillover effects) is, however, essential for enhancing landscape-level resilience to human alterations. We surveyed epixylic...

2012
Jesse R. Lasky

The movement of frugivores between remnant forests and successional areas is vital for tropical forest tree species to colonize successional habitats. The response of these species to the spatial structure of pasture tree cover is largely unknown. We studied avian frugivores that were found in primary forest edges and large pastures in eastern Amazonia, Brazil. We determined how the small-scale...

Determining Effective Factors on Forest Fire Using the Compound of Multivariate Adaptive Regression Spline and Genetic Algorithm, a Case Study: Golestan, Iran    Pahlavani, P., Assistant professor at School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran Raei, A., PhD Candidate of GIS at School of Surveying and Geospatial Engineering, College of Engineeri...

Determining Effective Factors on Forest Fire Using the Compound of Multivariate Adaptive Regression Spline and Genetic Algorithm, a Case Study: Golestan, Iran    Pahlavani, P., Assistant professor at School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran Raei, A., PhD Candidate of GIS at School of Surveying and Geospatial Engineering, College of Engineeri...

Information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of Caspian forests. Skidding and road construction costs are expensive forest operations. Determining the optimum forest road network density is one of the most important factors in sustainable forest management. Logging me...

Journal: :جغرافیا و مخاطرات محیطی 0
حسن فرامرزی سید محسن حسینی مهدی غلامعلی فرد

1. introduction extensive fires in the forests are examples of natural crises (hosseinali, 2005) and forest fire events are increasing in the conditions of changing climate and global warming; (azizi and yousefi, 2005). this phenomenon is considered one of the most destructive factors for forest ecosystems, causing irreparable damages (marozas et al, 2007). some of these damages include land us...

2012
Carolina Levis Priscila Figueira de Souza Juliana Schietti Thaise Emilio José Luiz Purri da Veiga Pinto Charles R. Clement Flavia R. C. Costa

BACKGROUND Native Amazonian populations managed forest resources in numerous ways, often creating oligarchic forests dominated by useful trees. The scale and spatial distribution of forest modification beyond pre-Columbian settlements is still unknown, although recent studies propose that human impact away from rivers was minimal. We tested the hypothesis that past human management of the usefu...

2015
Lars T. Waser Christoph Fischer Zuyuan Wang Christian Ginzler Joanne C. White

Forest mapping is an important source of information for assessing woodland resources and a key issue for any National Forest Inventory (NFI). In the present study, a detailed wall-to-wall forest cover map was generated for all of Switzerland, which meets the requirement of the Swiss NFI forest definition. The workflow is highly automated and based on digital surface models from image-based poi...

2014
Grażyna Łaska Aneta Sienkiewicz

Variability of green biomass quantity in plant communities found in study transects established along selected traffic routes in Białystok was studied. The study was conducted in a total of four transects including three in non-forest plant communities and one in a forest community located in the vicinity of Białystok’s main outbound roads. The effect of different distance of the study fields f...

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