Shrub Cover Models

Two models for estimating shrub cover percentage are available in Heureka.

Bilberry and lingonberry cover models by Bohlin

version 1.0 updated 25.4.2023

Model calculates the estimated bilberry and lingonberry shrub cover (%) based on the common stand attributes. Cover models are created based on the field data from Swedish NFI using general linear mixed effect models. Bilberry shrub cover is divided in two models, one for when site index is pine and one for when site index is spruce.

Model estimates should be used as an indication of the potential shrub cover, not as absolute measure.

Variables in Bilberry shrub cover models: - When Site index for pine: Vegetation type class, temperature sum, soil moisture class, basal area, stand age, site index class, time since thinning - When Site index for spruce: Vegetation type class, temperature sum, basal area, stand age, site index class, time since thinning Variables used in Lingonberry shrub cover model: - Vegetation type, temperature sum, basal area, basal area for pine, stand age, site index, time since thinning and time since clearcut. Report including detailed description of the model will be published soon!

Hedwall

requires a database containing data for inventoried cover for respective species and the carbon:nitrogen-ratio in the humus layer. To be updated.