landscape metrics quantifies structural features of the landscape. one of the advantages of these metrics is a possibility to use them in fast cumulative assessment of the development activities in the environment. in this paper, the cumulative effects of road network expansion on the tree cover of gorgan, kordkuy, aliabad townships in golestan province were investigated. to prepare the require...

Safety risk study on road transportation of hazardous chemicals is a reliable basis for the government to formulate transportation planning and preparing emergent schemes, but also is an important reference for safety risk managers to carry out dangerous chemicals safety risk managers. Based on the analysis of the transport safety risk of dangerous chemicals at home and abroad, this paper studi...

1 USDA Forest Service, Rocky Mountain Research Station, Fort Collins, CO 80526, USA 2 USDA Forest Service, Alaska Region, Anchorage, AK 99503, USA; and Department of Zoology & Physiology, University of Wyoming, Laramie, WY 80271, USA 3 Department of Environmental Science, Policy & Management, University of California, Berkeley, CA 94720, USA 4 School of Biological and Biomedical Sciences, Durha...

Steven G. McNulty, Jennifer A. Moore USDA Forest Service, Southern Global Change Program 920 Main Campus Dr., Venture Ctr. II, Ste. 300, Raleigh, NC 27606 USA Louis Iverson, and Anantha Prasad USDA Forest Service Northeastern Forest Experiment Station 359 Main Road, Delaware, OH 43015 USA Robert Abt North Carolina State University 3126 Jordan Hall, Raleigh, NC 27695 USA Bryan Smith, Ge Sun, Mic...

Roadside point counts are generally used for large surveys to increase the number of samples. We examined differences in species detected from roadside versus off-road (200-m and 400-m) point counts in the Shenandoah National Park. We also compared the list of species detected in the first 3 minutes to those detected in 10 minutes for potential species biases. Results from 81 paired roadside an...

State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Xiangshan, 100093 Beijing, China, Biodiversity, Macroecology and Conservation Biogeography Group, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Büsgenweg 1, 37077 Göttingen, Germany, Ministry of Education Key Laboratory of Poyang Lake Wetland and...

Roads can fragment animal populations, which can lead to decreased gene flow between populations. This causes increased genetic differentiation and decreased genetic diversity between and among populations. These affects are well documented in studies focusing upon the effects of urbanization on salamander populations, however, little is known about the effects of rural roads on fragmented popu...

In this study, CBR PLUS was used on gravel roads to reduce erosion and consequently maintenance costs of forest road network. Nano-polymer CBR PLUS with weight percentages of 0.25, 0.50, 0.75 and 1.00% in water were added to the surfacing materials of a forest road in Nekachoob Company of Iran. A comparative soil chemical and mechanical test for untreated and treated soil was carried out to obs...

The Amazon is a globally important system, providing a host of ecosystem services from climate regulation to food sources. It is also home to a quarter of all global diversity. Large swathes of forest are removed each year, and many models have attempted to predict the spatial patterns of this forest loss. The spatial patterns of deforestation are determined largely by the patterns of roads tha...

This paper represents a study on land-cover classification using different polarimetric SAR features. The experiment is carried out using Cand L-band fully polarimetric EMISAR data acquired on July 5 and 6, 1995 over an agricultural area in Fjärdhundra, near Uppsala, Sweden. The polarimetric features investigated are coherency matrix, intensity of both Cand L-band SAR, and Cloud decomposition p...