نتایج جستجو برای: forest stands

تعداد نتایج: 123621  

سوسنی, جواد, عرفانی‌فرد, سید یوسف, فرهادی, پیمان,

It is so important to know about ecological characteristics of trees of a stand, in forest management. The first step to achieve this knowledge is to recognize the spatial pattern of trees. Therefore, regarding the enviro-economic  importance of F. orientalis in hyrcanian forests, this study checked spatial pattern of these trees. In order to do this research, 5 one-hectare plots with homogeneo...

Journal: :Remote Sensing 2017
Henrik Persson Håkan Olsson Maciej J. Soja Lars M. H. Ulander Johan E. S. Fransson

This paper report experiences from the processing and mosaicking of 518 TanDEM-X image pairs covering the entirety of Sweden, with two single map products of above-ground biomass (AGB) and forest stem volume (VOL), both with 10 m resolution. The main objective was to explore the possibilities and overcome the challenges related to forest mapping extending a large number of adjacent satellite sc...

Journal: :Tree physiology 2008
James D Lewis Jeff Licitra Amy R Tuininga Abby Sirulnik Gregory D Turner Jacqui Johnson

Invasive, non-indigenous, phytophagous insects have caused widespread declines in several dominant tree species. The decline in dominant tree species may lead to cascading effects on other tree and microbial species and their interactions, affecting forest recovery following the decline. In the eastern USA, eastern hemlock (Tsuga canadensis (L.) Carr) is declining because of infestation by the ...

2012
Wesley Tack Maxime Madder Lander Baeten Margot Vanhellemont Robert Gruwez Kris Verheyen

A large fraction of the forests in northern Belgium consists of homogeneous pine stands on nutrientpoor and acid sandy soils. However, in common with many other parts of Europe, the current forest management aims at increasing the share of deciduous and mixed forests. This might create favourable habitats for the tick Ixodes ricinus, which is Europe’s main vector of Borrelia burgdorferi sensu l...

2016
Olalla Díaz-Yáñez Blas Mola-Yudego Rune Eriksen José Ramón González-Olabarria

The re-measurement of permanent forest inventories offers a unique opportunity to assess the occurrence and impact of forest disturbances. The present study aims at exploring the main forest damages in Norway based on the extensive data of several consecutive national forest inventories during the period 1995-2014. Five of the most common disturbance agents in Norway are selected for analysis: ...

Journal: :Известия СПбЛТА 2018

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