Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests
Empirical models for the abundance and berry yield of V. myrtillus were constructed using generalized linear mixed model (GLMM) techniques. The percentage coverage of bilberry was predicted as a function of site and stand characteristics using the permanent sample plots of the National Forest Invent...
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ftdoajarticles:oai:doaj.org/article:df0240307df74ad2b83a5a1181aa5adf 2023-05-15T17:00:15+02:00 Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests Miina, Jari Hotanen, Juha-Pekka Salo, Kauko 2009-01-01T00:00:00Z https://doi.org/10.14214/sf.181 https://doaj.org/article/df0240307df74ad2b83a5a1181aa5adf EN eng Finnish Society of Forest Science https://www.silvafennica.fi/article/181 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.181 https://doaj.org/article/df0240307df74ad2b83a5a1181aa5adf Silva Fennica, Vol 43, Iss 4 (2009) Forestry SD1-669.5 article 2009 ftdoajarticles https://doi.org/10.14214/sf.181 2022-12-31T04:22:05Z Empirical models for the abundance and berry yield of V. myrtillus were constructed using generalized linear mixed model (GLMM) techniques. The percentage coverage of bilberry was predicted as a function of site and stand characteristics using the permanent sample plots of the National Forest Inventory (NFI) in 1995. The number of bilberries was predicted as a function of percentage coverage and stand characteristics using a sub-sample of the NFI plots in North Karelia. The between-year variation in the bilberry yield was analysed using the permanent experimental plots (MASI) established in different areas of Finland and measured in 2001â2007. The highest coverage of bilberry was found on mesic heath sites; on sub-xeric and herb-rich heath sites the values were 62% of that for mesic sites. The decreasing effect of deciduous trees (compared to spruce) was significant only on herb-rich heath sites. The coverage increased along with stand development up to certain stand ages and basal areas. The bilberry yields were higher in pine-dominated stands than in spruce-dominated ones. In spruce stands, the coverage of bilberry and stand basal area significantly affected the number of berries, whereas in pine stands only the coverage was a significant predictor. In the MASI data, the bilberry yield of pine stands was two times higher than that of spruce stands; however, the between-year variation in bilberry yield was higher in the spruce than in the pine stands. The estimated models were used to predict the bilberry coverage and yield along with stand development. On mesic heath sites in southern Finland (1200 dd.), the predicted annual yield of bilberry was about 25 kg ha (95% confidence interval 9â73 kg ha) in a mature pine stand and about 10 kg ha (3â35 kg ha) in a mature spruce stand. The models can be included in stand simulators, where they would facilitate the prediction of bilberry abundance and yields for silvicultural and forest planning purposes.â1â1â1â1 Article in Journal/Newspaper karelia* Directory of Open Access Journals: DOAJ Articles Masi ENVELOPE(23.666,23.666,69.444,69.444) Silva Fennica 43 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Forestry SD1-669.5 |
spellingShingle |
Forestry SD1-669.5 Miina, Jari Hotanen, Juha-Pekka Salo, Kauko Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
topic_facet |
Forestry SD1-669.5 |
description |
Empirical models for the abundance and berry yield of V. myrtillus were constructed using generalized linear mixed model (GLMM) techniques. The percentage coverage of bilberry was predicted as a function of site and stand characteristics using the permanent sample plots of the National Forest Inventory (NFI) in 1995. The number of bilberries was predicted as a function of percentage coverage and stand characteristics using a sub-sample of the NFI plots in North Karelia. The between-year variation in the bilberry yield was analysed using the permanent experimental plots (MASI) established in different areas of Finland and measured in 2001â2007. The highest coverage of bilberry was found on mesic heath sites; on sub-xeric and herb-rich heath sites the values were 62% of that for mesic sites. The decreasing effect of deciduous trees (compared to spruce) was significant only on herb-rich heath sites. The coverage increased along with stand development up to certain stand ages and basal areas. The bilberry yields were higher in pine-dominated stands than in spruce-dominated ones. In spruce stands, the coverage of bilberry and stand basal area significantly affected the number of berries, whereas in pine stands only the coverage was a significant predictor. In the MASI data, the bilberry yield of pine stands was two times higher than that of spruce stands; however, the between-year variation in bilberry yield was higher in the spruce than in the pine stands. The estimated models were used to predict the bilberry coverage and yield along with stand development. On mesic heath sites in southern Finland (1200 dd.), the predicted annual yield of bilberry was about 25 kg ha (95% confidence interval 9â73 kg ha) in a mature pine stand and about 10 kg ha (3â35 kg ha) in a mature spruce stand. The models can be included in stand simulators, where they would facilitate the prediction of bilberry abundance and yields for silvicultural and forest planning purposes.â1â1â1â1 |
format |
Article in Journal/Newspaper |
author |
Miina, Jari Hotanen, Juha-Pekka Salo, Kauko |
author_facet |
Miina, Jari Hotanen, Juha-Pekka Salo, Kauko |
author_sort |
Miina, Jari |
title |
Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
title_short |
Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
title_full |
Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
title_fullStr |
Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
title_full_unstemmed |
Modelling the abundance and temporal variation in the production of bilberry (Vaccinium myrtillus L.) in Finnish mineral soil forests |
title_sort |
modelling the abundance and temporal variation in the production of bilberry (vaccinium myrtillus l.) in finnish mineral soil forests |
publisher |
Finnish Society of Forest Science |
publishDate |
2009 |
url |
https://doi.org/10.14214/sf.181 https://doaj.org/article/df0240307df74ad2b83a5a1181aa5adf |
long_lat |
ENVELOPE(23.666,23.666,69.444,69.444) |
geographic |
Masi |
geographic_facet |
Masi |
genre |
karelia* |
genre_facet |
karelia* |
op_source |
Silva Fennica, Vol 43, Iss 4 (2009) |
op_relation |
https://www.silvafennica.fi/article/181 https://doaj.org/toc/2242-4075 2242-4075 doi:10.14214/sf.181 https://doaj.org/article/df0240307df74ad2b83a5a1181aa5adf |
op_doi |
https://doi.org/10.14214/sf.181 |
container_title |
Silva Fennica |
container_volume |
43 |
container_issue |
4 |
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1766052893731848192 |