1. The impact of habitat disturbance on biodiversity conservation and animal health is poorly understood. Selective logging results in a suite of alterations that may increase infection risk and susceptibility to infection in resident populations. 2. The aim of this study was to improve our understanding of this interplay by examining the effects of logging on infection risk and gastrointestina...

hyrcanian (caspian) forest in northern iran with many endemic and endangered species is a rich area for biodiversity. the use of ground-based skidding is well accepted practice for the extraction of timber from the forest, but this has tended to cause the greatest environmental problems. the aim of the study was to evaluate and comparison of environmental impacts, residual stand damage, regener...

BACKGROUND There is a need for new satellite remote sensing methods for monitoring tropical forest carbon stocks. Advanced RADAR instruments on board satellites can contribute with novel methods. RADARs can see through clouds, and furthermore, by applying stereo RADAR imaging we can measure forest height and its changes. Such height changes are related to carbon stock changes in the biomass. We...

assessment and management of the environmental impacts of forest harvesting operations have become increasingly critical factors in practicing commercial forestry. this study investigated soil disturbance from a forest logging system operation on an 8-hectare mixed broadleaved stand in compartment no. 309 in gorazbon district in kheyrud educational and research forest. the objective of this stu...

forest harvesting operations for extracting of forest products in these trails, causing extensive damage in a wide range of soil and its productivity every year, therefore it is necessary to research about degradation of soil properties should be down. the aim of this study was investigate changes in the skid trails soil physical characteristics due to wheeled cable skidder traffic by measuring...

This paper reviews LiDAR ground filtering algorithms used in the process of creating Digital Elevation Models. We discuss critical issues for the development and application of LiDAR ground filtering algorithms, including filtering procedures for different feature types, and criteria for study site selection, accuracy assessment, and algorithm classification. This review highlights three featur...

A review of the challenges and opportunities in estimating above ground forest biomass using treelevel models Hailemariam Temesgen, David Affleck, Krishna Poudel, Andrew Gray & John Sessions a Department of Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR 97333, USA b College of Forestry and Conservation, The University of Montana, 32 Campus Drive, Missoula, ...

A land manager's guide to improving habitat for forest thrushes. The Cornell Lab of Ornithology. and federal and state wildlife agencies for discussions of forest-bird management and for helping us improve this document. Special thanks to Cristina Faustino for her numerous contributions to the data analysis and Barb Kott for her coordination of the project in conjunction with the Forest Service...

These effects on tree growth, which may persist for several decades (Hatchell et al. 1970, Butt 1987, Miller et al. 1996), may lead to shortand long-term reductions in tree growth and forest productivity. The level of soil disturbance will vary with soil texture, forest floor thickness, and soil water content at time of harvest (Miller and Sirois 1986, Corns 1988). In addition, machine type, si...

As people penetrate the Amazon interior, they build roads and clear large expanses of land. Over time, this process of deforestation creates forest fragments, islands of trees surrounded by a sea of pastures, farmland, and other degraded habitats. Laurance and his colleagues at the Smithsonian Tropical Research Institute are studying what happens to the forests when trees lose ground to agricul...