نتایج جستجو برای: forest grazing

تعداد نتایج: 120565  

Journal: :Journal of phycology 2013
Kyle VanMeter Matthew S Edwards

Recent studies have indicated that long-distance dispersal by kelp zoospores may play an important role in the colonization of newly exposed rocky habitats and in the recovery of recently disturbed kelp forests. This may be facilitated by the vertical transport of zoospores into the shallower portions of the water column where they are exposed to greater alongshore currents that increase their ...

Journal: :caspian journal of environmental sciences 2013
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...

Mohammad kazem Parsapour Yousef Askari, Zahra Hosseni

To modeling of Suitability Iranian Oak site to establish coppice regenerations, chahartagh forest reserve, Ardal region, chaharmehal and Bakhtiari Province, southern Zagros forest, and southwest Iranian state was selected. To modeling Suitability Iranian Oak used the physiographic element, soil depth, climatology and distance from village selected. To this study used the raster formats by pixel...

Journal: :American journal of primatology 2014
Nelly Ménard Peggy Motsch Alexia Delahaye Alice Saintvanne Guillaume Le Flohic Sandrine Dupé Dominique Vallet Mohamed Qarro Mohamed Ibn Tattou Jean-Sébastien Pierre

Barbary macaques live in extreme temperate environments characterized by strongly seasonal resource availability. They are mainly terrestrial while foraging, harvesting food from the herbaceous layer. These monkeys are threatened mainly because of anthropogenic habitat degradation. We studied the adaptive capacities of wild groups of Barbary macaques that lived in different cedar forests underg...

2008
Amarnath Giriraj Mohammed Irfan-Ullah Manchi Sri Ramachandra Murthy Carl Beierkuhnlein

This study used time series remote sensing data from 1973, 1990 and 2004 to assess spatial forest cover change patterns in the Kalakad-Mundanthurai Tiger Reserve (KMTR), South Western Ghats (India). Analysis of forest cover changes and its causes are the most challenging areas of landscape ecology, especially due to the absence of temporal ground data and comparable space platform based data. C...

2006
Tairone Paiva Leão Álvaro Pires da Silva

Measurements of soil penetration resistance (SR) have been frequently used for the evaluation of soil structural quality for plant growth. However, different data analysis approaches have been used, without a previous evaluation of their statistical quality. In this study we tested the hypothesis that the mean is the parameter with best statistical properties to evaluate alterations in soil pen...

Journal: :Preventive veterinary medicine 2014
Tim E Carpenter Victor L Coggins Clinton McCarthy Chans S O'Brien Joshua M O'Brien Timothy J Schommer

Bighorn sheep currently occupy just 30% of their historic distribution, and persist in populations less than 5% as abundant overall as their early 19th century counterparts. Present-day recovery of bighorn sheep populations is in large part limited by periodic outbreaks of respiratory disease, which can be transmitted to bighorn sheep via contact with domestic sheep grazing in their vicinity. I...

2006
Temuulen Tsagaan Sankey Cliff Montagne Lisa Graumlich Rick Lawrence Jerry Nielsen

We studied 20th century lower forest–grassland ecotone shift in the Centennial Valley in southwestern Montana and investigated the effects of livestock herbivory on ecotone shift at a local spatial scale and a decadal time scale. A total of 525 aspen (Populus tremuloides) and 1703 Douglasfir (Pseudotsuga menziesii) trees were cored and 10,168 saplings were mapped along the ecotone at five sites...

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