Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2010
Abstract
No abstract has been registered
Abstract
All the Norwegian CLC2006 classes are documented through descriptive statistical “profiles” of the actual contents in each class. The CLC2006 profiles are worked through based on an overlay operation between CLC2006 and AR5 (under the timberline) and AR50 (above the timberline). Based on this dataset statistics are generated, that shows the percent distribution of AR5 and AR50 classes in each CLC2006 class. The study was carried out with funding from the Norwegian Space Centre.
Authors
Roman Gebauer Josef Urban Isabella Børja Vladimir Gryc H Vavrcik Daniel Volarik Petra RychteckaAbstract
The drought stress presents a significant threat for the forest ecosystems. The climate change brings some extreme climatic conditions including longer and more common periods of the drought into the still more forest stands. Current forest management and consecutively wood processing industry in the Czech Republic is nowadays dependent mostly on the Norway spruce. In the same hand, Norway spruce is probably the most threatened tree species by the climate change. Therefore there is a demand for the suitable methodology to monitor the direct effect of the drought on the trees. Presented publication puts together different methods of the evaluation of the water stress and tries to assess their value for the study of the water stress. Of course, there are dozen of the methods to study the water stress. In this handbook we skipped the difficult and expensive techniques and focused rather on the simple methods, suitable for the field use. Methodology begins with the description of the meteorological measurements with current widely available instrumental techniques (i.e. measurements of the intensity of global radiation, air temperature and humidity, wind speed and precipitation) and continues with the monitoring of the soil water content and soil water potential. Then there is a focus on the direct effect of the water stress on the plant. We began with the plant root system since we believed that the fine roots were the most susceptible part of the tree. The focus was on their morphology, anatomy and biological activity. In the aboveground part of the tree we focused on the development of the hydraulic architecture of the tree on the microscopic level. This theoretical analysis was validated by the in-situ measurements of the sap flow. Direct and immediate effect of the water stress on the plant water status is described in the means of the plant water potential. Similarly to the hydraulic architecture we dealt with both the xylogenesis (on the cellular level) and the stem increment measured (on the tree level) by the logging band dendrometers. Finally we discussed the effect of the plant water status on the mineral nutrition of the tree. To conclude, none of the methods alone can implicate the complexity of the water stress, however the combination of the different views gives rather good insight on the tree condition and enable to predict the further tree development.
Authors
Karl ThunesAbstract
No abstract has been registered
Editors
Helmer BelboAbstract
The OSCAR network was formed in 2005 and includes five Nordic forest research institutes Metla (Finland), Mesäteho (Finland), Skogforsk (Sweden), Skov & Landskab (Denmark) and Skog og Landskap (Norway) and SILAVA (Latvia). The network is open for all relevant research bodies in the Nordic and Baltic countries. OSCAR is one of five virtual centres of advanced research financed by the Nordic Forest Research Cooperation Committee (SNS). The main target of OSCAR is increasing the excellence and critical mass of R&D within the field of forest operations research by integrating research resources and expertise, besides promoting and developing efficient, competitive and environmentally friendly forest operation systems on a joint Nordic basis....
Authors
Alhaji S. Jeng Wilkson Makumba Jeremiah OkoyoAbstract
No abstract has been registered
Abstract
No abstract has been registered
2009
Abstract
No abstract has been registered
Abstract
No abstract has been registered
2008
Authors
David Bredström Patrik Flisberg Linda Rud Mikael Rönnqvist Mikael RönnqvistAbstract
No abstract has been registered