نتایج جستجو برای: forest types

تعداد نتایج: 587788  

Journal: :Remote Sensing 2015
Boris Thies Alexander Groos Martin Schulz Ching-Feng Li Shih-Chieh Chang Jörg Bendix

The relationship between satellite-derived low cloud frequency and the occurrence of tropical montane cloud forest (TMCF) in Taiwan was investigated. From daily MODIS cloud mask products between 2003 and 2012 the low cloud class was extracted and mean low cloud frequency was calculated for Taiwan. This low cloud frequency map was blended with an existing plot-based vegetation classification for...

2017
Rodrigo B. Ferreira Karen H. Beard Martha L. Crump

Understanding the response of species with differing life-history traits to habitat edges and habitat conversion helps predict their likelihood of persistence across changing landscape. In Brazil’s Atlantic Forest, we evaluated frog richness and abundance by breeding guild at four distances from the edge of a reserve: i) 200 m inside the forest, ii) 50 m inside the forest, iii) at the forest ed...

2018
Hongliu Cao Simon Bernard Laurent Heutte Robert Sabourin

Breast cancer is one of the most common types of cancer and leading cancer-related death causes for women. In the context of ICIAR 2018 Grand Challenge on Breast Cancer Histology Images, we compare one handcrafted feature extractor and five transfer learning feature extractors based on deep learning. We find out that the deep learning networks pretrained on ImageNet have better performance than...

Journal: :جنگل و فرآورده های چوب 0
زهرا قربانی دانشجوی کارشناسی ‏ارشد مهندسی جنگل، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران مقداد جورغلامی دانشیار گروه جنگل داری و اقتصاد جنگل، دانشکدة منابع طبیعی، دانشگاه تهران، کرج، ایران

the log damage and value loss were examined by felling and bucking function, species, and damage type, in kheyrud forest in namkhaneh district in the hyrcanian forest of iran. in order to calculate the wood value following tree felling and bucking, 250 trees and 167 logs consisting of beech and hornbeam species were measured. there were five types of damage recorded following the tree felling o...

2015
Dávid Bogyó Tibor Magura Dávid D. Nagy Béla Tóthmérész

We studied the distribution of millipedes in a forest interior-forest edge-grassland habitat complex in the Hajdúság Landscape Protection Area (NE Hungary). The habitat types were as follows: (1) lowland oak forest, (2) forest edge with increased ground vegetation and shrub cover, and (3) mesophilous grassland. We collected millipedes by litter and soil sifting. There were overall 30 sifted lit...

2011
E. Menaka

Forest fires are a chief environmental concern, causing economical and ecological damage. The application of remote sensing is at present a significant method for forest fires monitoring, particularly in vast and remote areas. Different methods have been presented by the researchers for finding forest types and fire detection. In this study, we propose polygon segmentation for adaptive regional...

2013
Joseph L. Ganey Scott C. Vojta

Down logs provide important ecosystem services in forests and affect surface fuel loads and fire behavior. Amounts and kinds of logs are influenced by factors such as forest type, disturbance regime, forest management, and climate. To quantify potential short-term changes in log populations during a recent globalclimate-change type drought, we sampled logs in mixed-conifer and ponderosa pine (P...

2015
Diana Laarmann Henn Korjus Allan Sims Ahto Kangur Andres Kiviste John A. Stanturf

Post-mining restoration sites often develop novel ecosystems as soil conditions are completely new and ecosystem assemblage can be spontaneous even on afforested sites. This study presents results from long-term monitoring and evaluation of an afforested oil-shale quarry in Estonia. The study is based on chronosequence data of soil and vegetation and comparisons are made to similar forest site-...

2013
Ivar Vleut Samuel Israel Levy-Tacher Willem Frederik de Boer Jorge Galindo-González Luis-Bernardo Vazquez

Most studies on frugivorous bat assemblages in secondary forests have concentrated on differences among successional stages, and have disregarded the effect of forest management. Secondary forest management practices alter the vegetation structure and fruit availability, important factors associated with differences in frugivorous bat assemblage structure, and fruit consumption and can therefor...

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