نتایج جستجو برای: forest

تعداد نتایج: 106136  

A. Salehi, al. et

The purpose of this study was to investigate the impacts of forest-based activities on the conditions of the Ganaveh woodland in the southern Zagros, Iran, and to suggest strategies for improving the implementation of forest resource management plans. Woodland inventory data was gathered in 2003, accompanied with data from interviews in 2008, were used in this study. The results show that there...

توانکار, فرزام, نیکوی, مهرداد,

Rotten and dead trees are the main component of forest ecosystems and play an important role in maintaining forest biodiversity. In this research frequency and characteristics of large diameter trees (normal, rotten, and dead trees) with diameter at breast height greater than 60 cm were studied in two compartments (selective logged and protected) in Asalem-Nav forest. Random systematic sampling...

2016
Shonil A. Bhagwat Sandra Nogué Katherine J. Willis

Sacred forest groves in the Western Ghats of India are small fragments of tropical forest that have received protection due to religious beliefs and cultural practices. These forest fragments are an example of community-based conservation and they serve as refugia for many forest-dwelling species in otherwise highly anthropogenic tropical forest-agriculture landscapes of the Indian Western Ghat...

2015
John Devaney Brian Barrett Frank Barrett John Redmond John O`Halloran Ben Bond-Lamberty

Quantification of spatial and temporal changes in forest cover is an essential component of forest monitoring programs. Due to its cloud free capability, Synthetic Aperture Radar (SAR) is an ideal source of information on forest dynamics in countries with near-constant cloud-cover. However, few studies have investigated the use of SAR for forest cover estimation in landscapes with highly sparse...

2009
Jean P. Elbers J. L. Bossart

The willingness of a species to leave a forest fragment is a prerequisite for subsequent dispersal across the intervening non-forested landscape. Species with stringent fidelity to the forest patch will be isolated from populations in other fragments and predisposed to factors that promote extinction of local populations. Here, we document which fruit-feeding, forest-dwelling butterflies occur ...

2013
C. W. Woodall K. Zhu J. A. Westfall C. M. Oswalt A. W. D’Amato B. F. Walters H. E. Lintz

USDA Forest Service, Northern Research Station, Forest Inventory and Analysis Program, St. Paul, MN 55108, USA Nicholas School of the Environment, Duke University, Durham, NC 27708, USA USDA Forest Service, Northern Research Station, Forest Inventory and Analysis Program, Newtown Square, PA 19073, USA USDA Forest Service, Southern Research Station, Forest Inventory and Analysis Program, Knoxvil...

2008
G. Pinter

We show how the Hopf algebra structure of renormalization discovered by Kreimer can be found in the Epstein-Glaser framework without using an analogue of the forest formula of Zimmermann.

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