Individual-tree diameter growth model for sugar maple trees in uneven-aged northern hardwood stands under selection system

Autor:	Ralph D. Nyland, Eddie Bevilacqua, Diane H. Kiernan
Rok vydání:	2008
Předmět:	Maple Mixed model biology Ecology Forestry Vegetation Management Monitoring Policy and Law engineering.material biology.organism_classification Basal area Deciduous Aceraceae Statistics Hardwood engineering Nature and Landscape Conservation Woody plant Mathematics
Zdroj:	Forest Ecology and Management. 256:1579-1586
ISSN:	0378-1127
DOI:	10.1016/j.foreco.2008.06.015
Popis:	An individual-tree diameter model was developed for sugar maple (Acer saccharum Marsh.) in northern hardwood stands managed under selection system. We fitted long-term remeasurement data to a linear mixed model to account for the temporal autocorrelation of the remeasurements. The model was evaluated using independent data from two physiographic regions and representing a range of tree diameter classes, residual basal areas and years since cut. We compared our model to several individual-tree models based on data from stands with varied management histories. Several competition indices were also tested for an improvement in model fitting and prediction. Our model had lower bias and prediction error when compared to two previous models, as it better accounted for the increased diameter growth that occurred in trees from appropriately managed stands. The addition of a tree-specific competition index failed to improve model fit and predictive ability over stand-level basal area.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::06a45505f2e9d843f358372da4763f6c https://doi.org/10.1016/j.foreco.2008.06.015 Zobrazit plný text záznamu Full Text from ScienceDirect