A model bridging distance-dependent and distance-independent tree models to simulate the growth of mixed forests
• It is widely believed that distance-independent tree models fail to take into account the complexity of mixed stands due to the fact that spatial structure often has a greater impact on growth and dynamics in mixed stands than in pure stands. On the other hand, distance-dependent tree models are d...
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Veröffentlicht in: | Annals of forest science. 2010, Vol.67 (5), p.502-502 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | • It is widely believed that distance-independent tree models fail to take into account the complexity of mixed stands due to the fact that spatial structure often has a greater impact on growth and dynamics in mixed stands than in pure stands. On the other hand, distance-dependent tree models are difficult to use because they require a map of the stand, which is not only very costly but also impracticable in a routine management context.
• This paper reports the development of a model bridging distance-dependent and distanceindependent tree models, and that is designed to simulate the growth of a mixed forest. The model used distributions of the number of neighbours to reconstruct tree neighbourhoods and compute the competition indices needed as inputs to the growth model.
• Data were collected from a mixed forest of sessile oak and Scots pine in central France. The study showed that local competition indices explained a significant proportion of growth variability and that intraspecific competition was greater than interspecific competition. The model based on neighbourhood distributions gave consistent predictions compared to a distance-dependent model.
• This type of model could be used instead of distance-dependent models in management contexts. |
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ISSN: | 1286-4560 1297-966X |
DOI: | 10.1051/forest/2010004 |