نتایج جستجو برای: forest roads

تعداد نتایج: 119097  

2001
Cherry M. E. Keller Mark R. Fuller

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...

Journal: :Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 2014

Journal: :Computers & Geosciences 2014
Zhiyong Wang Sisi Zlatanova Aitor Moreno Peter van Oosterom Carlos Toro

The ability to guide relief vehicles to safety and quickly pass through environments affected by fires is critical in fighting forest fires. In this paper, we focus on route determination in the case of forest fires, and propose a data model that supports finding paths among moving obstacles. This data model captures both static information, such as the type of the response team, the topology o...

2008
Sean S. Madden George R. Robinson John G. Arnason

Studies of forested rural watersheds provide estimates of background contamination for comparison with streams and rivers in other settings. We performed a landscape analysis and measured major dissolved ions and benthic macroinvertebrates for a small rural watershed in Albany County, NY, to determine spatial variation in water quality. An estimated 73% of the surface cover is postagricultural ...

2012
Peter L. Erb William J. McShea Robert P. Guralnick

Anthropogenic effects on wildlife are typically assessed at the local level, but it is often difficult to extrapolate to larger spatial extents. Macro-level occupancy studies are one way to assess impacts of multiple disturbance factors that might vary over different geographic extents. Here we assess anthropogenic effects on occupancy and distribution for several mammal species within the Appa...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Chase D Mendenhall Cagan H Sekercioglu Federico Oviedo Brenes Paul R Ehrlich Gretchen C Daily

Growing demand for food, fuel, and fiber is driving the intensification and expansion of agricultural land through a corresponding displacement of native woodland, savanna, and shrubland. In the wake of this displacement, it is clear that farmland can support biodiversity through preservation of important ecosystem elements at a fine scale. However, how much biodiversity can be sustained and wi...

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