TAILIEUCHUNG - Báo cáo lâm nghiệp: "Development of species composition in long term simulations with an individual-tree growth simulator"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Development of species composition in long term simulations with an individual-tree growth simulator. | JOURNAL OF FOREST SCIENCE 55 2009 5 194-200 Development of species composition in long term simulations with an individual-tree growth simulator M. Huber H. Sterba Department of Forest and Soil Sciences Institute of Forest Growth and Yield Research BOKU - University of Natural Resources and Applied Life Sciences Vienna Austria ABSTRACT The spruce-fir-beech dominated forest stands in Litschau in the Austrian part of the Bohemian Massif were converted by former forest management practices into pure Norway spruce stands and are now discussed to be reconverted into the potential natural vegetation type. The targeted potential natural vegetation type is usually defined by experts in vegetation sciences. Because meanwhile individual-tree growth simulators are a well acknowledged tool for predicting future forest stand development in this study we investigate if PrognAus can also be used to predict the redevelopment of managed forest ecosystems into natural forest ecosystems regarding species composition. The development of 23 stands in Litschau has been simulated over 1 000 years under the no-management option. Generally the simulated species distribution agrees quite well with the expectations of the potential natural vegetation type. However the predicted amounts of silver fir and maple species are lower than expected which probably is due to browsing and management effects represented in the parameterization data for PrognAus. Keywords individual-tree growth model potential natural vegetation type forest stand development species distribution In many regions of Austria former forest management practices formed even aged pure Norway spruce stands. Due to different ecological as well as economical reasons these stands are now discussed to be converted into mixed species stands according to potential natural vegetation type sensu Tuxen 1956 . For Austrian forest sites the potential natural species distribution were described by Starlinger in Lexer 2001 . Another way to .

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