Projects / Programmes source: ARIS

Growth response of pedunculate oak (Quercus robur L.) and european larch (Larix decidua Mill.) to environmental changes

Research activity

Code Science Field Subfield
4.01.00  Biotechnical sciences  Forestry, wood and paper technology   

Code Science Field
B270  Biomedical sciences  Plant ecology 
B430  Biomedical sciences  Sylviculture, forestry, forestry technology 
Ecophysiology, dendroecology, pedunculate oak, european larch, climate change impact, Slovenia
Evaluation (rules)
source: COBISS
Researchers (11)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  15493  PhD Matjaž Čater  Forestry, wood and paper technology  Researcher  2007 - 2010  298 
2.  22609  PhD Jožica Gričar  Forestry, wood and paper technology  Researcher  2007 - 2010  527 
3.  29831  Špela Jagodic    Technical associate  2008 - 2010 
4.  21543  PhD Tjaša Kanduč  Geology  Researcher  2007 - 2010  479 
5.  07127  PhD Hojka Kraigher  Forestry, wood and paper technology  Researcher  2007 - 2010  1,321 
6.  17333  Robert Krajnc    Technical associate  2007 - 2010  55 
7.  11595  PhD Tomislav Levanič  Forestry, wood and paper technology  Head  2007 - 2010  610 
8.  11279  PhD Nives Ogrinc  Control and care of the environment  Researcher  2007 - 2010  1,120 
9.  28230  Peter Ogrinc    Technical associate  2007  11 
10.  10264  PhD Primož Simončič  Forestry, wood and paper technology  Researcher  2007 - 2010  691 
11.  15729  Stojan Žigon    Technical associate  2007 - 2010  312 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  88,063 
2.  0404  Slovenian Forestry Institute  Ljubljana  5051673000  11,726 
With proposed project a key physiological processes will be studied in two tree species (Pedunculate oak Quercus robur L.) and European Larch (Larix decidua Mill.) on extreme and optimal sites in connection with enviromental parameters and climatic extremes. Special emphasis will be put on defining the parameters, which significantly affect growth and could become the limiting factors for the future development of both species in case of further change and increase of stress conditions. On established research plots within two growing seasons continuous measurements of increment with automatic dendrometers, measurements of cambial activity and sapflow measurements will be performed. In defined time intervals measurements of photosynthesis, transpiration and potential evapotranspiration, water potential, soil respiration and light condition will be performed in parallel, compared to data from closest national meteorological stations and from microclimatic measurements on plots. Long term growth and tree ring analysis with content of stabile carbon isotope ( ) will give a possibility for the retrospective reconstruction of enviromental conditions (water stress) in the past, while comparison with other measured parameters will make possible to model short term scenarios of growth response in observed species for the future. Achieved knowledge willbe potentionally used to predict future response of the trees and forest sites with climate change and human induced enviromental stress impacts. This knowledge will be important in developing strategies and forest management plans for optimal and sustainable management of Slovenisn forests in the future.
Significance for science
Project was focused on effects caused by climate changes in ecologically important and extreme forest sites of upper timberline and lowland forests. Focus of recent research was oriented either towards single tree or on wider spatial unit, which were too large for more in-depth interpretation of results as well as for some forecasts or future scenarios of process development. Within this research ecophysiological, wood-anatomical and dendroecological data were compared with meteorological parameters. In such way tree responses in the past will be defined and with modelling some possible scenarios of future growth responses to environmental / climatic changes will be established. Database of research measurements will make a significant contribution in broadening the basic knowledge of forest biology, ecology and technology research program, especially in view of modelling and predicting tree response reactions to environmental stress conditions. Research is giving an important contribution to other projects; cooperation with foreign research team from Great Britain is giving us access to knowledge, technology and instruments which are not available in Slovenia (carbon isotope analysis). In particular we would like to stress the following achievement of the project (all below described research work is done only at our institution (except pinning)): 1. measurement of the radial increment with automatic dendrometers 2. measurement of the sap flow on adult trees 3. measurement of the photosynthetic activity and respiration in the crown of adult trees 4. pinning of the cambium zone, response of it to climate change and research done in this field is in the top of the world knowledge related to this topic 5. research of stable carbon isotope in tree rings is new in Slovenia, it is only done in frame of this and 6.FP project MILLENNIUM
Significance for the country
Forests are important part of national identity - only healthy forests could provide all its benefits without obstructions. Forecasted climatic changes could significantly change structure and function of forests on extreme sites, so it is of crucial importance to know what would be the most possible response to predicted climate changes. The role of upper timberline forest is mainly protective; water supply, protection against avalanches and erosions are just some of critical aspects, important for well being of all inhabitants in Slovenia. On the other hand is the area of lowland oak forests becoming narrower because of the intensive settlement in the past, conflicts in land use and climatic extremes. Their main role is to provide high quality timber and to protect and conserve special habitats (according to Natura 2000, Ramsar Convention on Wetlands and Bird Directive). One of the mains goals of European community is to preserve these types of forests, especially in environments with severe impacts. In time of global environmental changes is preservation of forest on extreme sites important also in view of carbon assimilation and fixation and Slovenia's effort to fulfil demands of the KYOTO protocol.
Most important scientific results Annual report 2008, 2009, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2008, 2009, final report, complete report on dLib.si
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