Application and limitations of growth models for silvicultural purposes in heterogeneously structured forest in Sweden
| Autor: | B. Elfving, N. Fahlvik, L. Drössler |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
040101 forestry
Stand development Forest inventory 010504 meteorology & atmospheric sciences Thinning Agroforestry Forest management Taiga Soil Science Forestry 04 agricultural and veterinary sciences 01 natural sciences Basal area 0401 agriculture forestry and fisheries Secondary forest Environmental science 0105 earth and related environmental sciences Undergrowth |
| Zdroj: | Journal of Forest Science. 59:458-473 |
| ISSN: | 1805-935X 1212-4834 |
| DOI: | 10.17221/33/2013-jfs |
| Popis: | The paper addresses the problem of estimating future stand development in heterogeneously structured forests in Sweden; specifically, multi-layered spruce stands and mature pine stands with advanced spruce undergrowth. We first introduce various supporting concepts and models with their empirical databases, model validation and con - straints. Secondly, Swedish single-tree growth functions designed for more heterogeneously structured forest are tested using data from inventory plots, a thinning experiment in an uneven-aged forest stand, and yield plots in pristine forest. Future growth of a managed, multi-layered forest was simulated and is compared with other selected functions. Simulation results, expected errors and time constraints are discussed. For most models, projected stand basal area growth deviated 10-20% from the observed growth in individual stands. In single stands, the deviation ranged from 0 to 60%. Validation periods were often 5-15 years, sometimes even more than 30 years. For Swedish single-tree basal area growth functions, on average, a 5% overestimate was found for heterogeneously structured forest across Sweden. Observed growth in a boreal single-tree selection forest was underestimated by 12.5% fifteen years after thinning from above. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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