References
- Angelstam, P., Kuuluvainen, T. 2004. Boreal forest disturbance regimes, successional dynamics and landscape structures – a European perspective. – Ecological Bulletins, 51, 117–136.
- Barbier, S., Gosselin, F., Balandier, P. 2008. Influence of tree species on understory vegetation diversity and mechanisms involved – A critical review for temperate and boreal forests. – Forest Ecology and Management, 254, 1–15. https://doi.org/10.1016/j.foreco.2007.09.038.10.1016/j.foreco.2007.09.038
- Bušs, K. 1976. Basis of forest classification in SSR of Latvia. LRZTIPI, Riga. 73 p. (In Latvian).
- Clarke, K.R. 1993. Non-parametric multivariate analysis of changes in community structure. – Australian Journal of Ecology, 18(1), 117–143. https://doi.org/10.1111/j.1442-9993.1993.tb00438.x.10.1111/j.1442-9993.1993.tb00438.x
- Cronberg, N., Wyatt, R., Odrzykoski, I.J., Andersson, K. 2005. Genetic diversity of the moss Plagiomnium affine in forests of contrasting age. – Lindbergia, 30(2), 49–58.
- Egnell, G. 2011. Is the productivity decline in Norway spruce following whole-tree harvesting in the final felling in boreal Sweden permanent or temporary? – Forest Ecology and Management, 261(1), 148–153. https://doi.org/10.1016/j.foreco.2010.09.045.10.1016/j.foreco.2010.09.045
- Egnell, G., Jurevics, A., Peichl, M. 2015. Negative effects of stem and stump harvest and deep soil cultivation on the soil carbon and nitrogen pools are mitigated by enhanced tree growth. – Forest Ecology and Management, 338, 57–67. https://doi.org/10.1016/j.foreco.2014.11.006.10.1016/j.foreco.2014.11.006
- Egnell, G., Leijon, B. 1997. Effects of different levels of biomass removal in thinning on short term production of Pinus sylvestris and Picea abies stands. – Scandinavian Journal of Forest Research, 12, 17–26. https://doi.org/10.1080/02827589709355379.10.1080/02827589709355379
- Ellenberg, H. 1988. Vegetation Ecology of Central Europe. 4th Ed. Cambridge, Cambridge University Press. 731 pp.
- Engelmark, O., Hytteborn, H. 1999. Coniferous forests. – Sjögren, E. (ed.). Swedish plant geography. Uppsala, Opulus Press, 55–75.
- Grime, J.P. 2006. Plant strategies, vegetation processes and ecosystem properties. Chichester, John Wiley & Sons Ltd. 456 pp.
- Hakkila, P. (ed.). 2004. Developing technology for large-scale production of forest chips. Wood Energy Technology Programme 1999-2003. Helsinki, Tekes. 99 pp.
- Hart, S.A., Chen, H.Y.H. 2008. Fire, logging, and overstory affect understory abundance, diversity, and composition in boreal forest. – Ecological Monographs, 78(1), 123–140. https://doi.org/10.1890/06-2140.1.10.1890/06-2140.1
- Hyvönen, R., Kaarakka, L., Leppälammi-Kujansuu, J., Olsson, B.A., Palviainen, M., Vegerfors-Persson, B., Helmisaari, H.-S. 2016. Effects of stump harvesting on soil C and N stocks and vegetation 8–13 years after clear-cutting. – Forest Ecology and Management, 371, 23–32. https://doi.org/10.1016/j.foreco.2016.02.002.10.1016/j.foreco.2016.02.002
- Jonsson, B.G., Essen, P.A. 1990. Treefall disturbance maintains high bryophyte diversity in a boreal spruce forest. – Journal of Ecology, 78, 924–936. https://doi.org/10.2307/2260943.10.2307/2260943
- Kneeshaw, D.D., Bergeron, Y. 1998. Canopy gap characteristics and tree replacement in the Southeastern boreal forest. – Ecology, 79(3), 783–794. https://doi.org/10.2307/176578.10.2307/176578
- Kolstad, A.L., Asplund, J., Nilsson, M.C., Ohlson, M., Nybakken, L. 2016. Soil fertility and charcoal as determinants of growth and allocation of secondary plant metabolites in seedlings of European beech and Norway spruce. – Forest Ecology and Management, 131, 39–46. https://doi.org/10.1016/j.envexpbot.2016.06.013.10.1016/j.envexpbot.2016.06.013
- Krebs, C.J. 2014. Species diversity measures. – Krebs, C.J. (ed.). Ecological methodology. Vancouver, University of British Columbia, 532–593.
- Kubin, E. 1983. Nutrients in the soil, ground vegetation and tree layer in an old spruce forest in Northern Finland. – Annales Botanici Fennici, 20(4), 361–390.
- Luzuriaga, A.L., Escudero, A., Olano, J.M., Loidi, J. 2005. Regenerative role of seed banks following an intense soil disturbance. – Acta Oecologica, 27(1), 57–66. http://doi.org/10.1016/j.actao.2004.09.003.10.1016/j.actao.2004.09.003
- Miles, J. 1985. The pedogenic effects of different species and vegetation types and the implications of succession. – Journal of Soil Science, 36(4), 571–584. https://doi.org/10.1111/j.1365-2389.1985.tb00359.x.10.1111/j.1365-2389.1985.tb00359.x
- Nikodemus, O., Kļaviņš, M., Krišjāne, Z., Zelčs, V. 2018. Latvija. Zeme, Daba, Tauta, Valsts. Rīga, Latvijas Universitātes Akadēmiskais apgāds. 752 pp. (In Latvian).
- Nilsson, M.C., Wardle, D.A. 2005. Understory vegetation as a forest ecosystem driver: evidence from the northern Swedish boreal forest. – Frontiers in Ecology and the Environment, 3(8), 421–428.
- Oksanen, J., Blanchet, F.G., Friendly, M., Kindt, R., Legendre, P., McGlinn, D., Minchin, P.R., O’Hara, R.B., Simpson, G.L., Solymos, P., Henry, M., Stevens, H., Szoecs, E., Wagner, H. 2013. Vegan: Community Ecology Package. [WWW document]. – URL http://CRAN.R-project.org/package=vegan/. [Accessed 27 December 2018]
- Packham, J.R. 1978. Biological flora of the British Isles. Oxalis Acetosella L. – Journal of Ecology, 66, 669–693.
- R Core Team. 2017. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. [WWW document]. – URL https://www.R-project.org/. [Accessed 27 December 2018].
- Rytter, L., Johansson, K., Karlsson, B., Stener, L.-G. 2013. Tree Species, Genetics and Regeneration for Bioenergy Feedstock in Northern Europe. – Kellomäki, S., Kilpeläinen, A., Alam, S. (eds.). Forest BioEnergy Production. New York, Springer, 7–16.
- Saetre, P., Saetre, L.S., Brandtberg, P.-O., Lundkvist, H., Bengtsson, J. 1997. Ground vegetation composition and heterogeneity in pure Norway spruce and mixed Norway spruce-birch stands. – Canadian Journal of Forest Research, 27, 2034–2042. https://doi.org/10.1139/x97-177.10.1139/x97-177
- Saksa, T. 2013. Regeneration after stump harvesting in southern Finland. – Forest Ecology and Management, 290, 79–82. https://doi.org/10.1016/j.foreco.2012.08.014.10.1016/j.foreco.2012.08.014
- Sirén, M. 1955. The development of spruce forest on raw humus sites in Northern Finland and its ecology. – Acta Forestalia Fennica, 62(4), 1–408. https://doi.org/10.14214/aff.7453.
- Uotila, A., Kouki, J. 2005. Understorey vegetation in spruce-dominated forests in eastern Finland and Russian Karelia: Successional patterns after anthropogenic and natural disturbances. – Forest Ecology and Management, 215(1–3), 113–137. https://doi.org/10.1016/j.foreco.2005.05.008.10.1016/j.foreco.2005.05.008
- Vanha-Majamaa, I., Shorohova, E., Kushnevskaya, H., Jalonen, J. 2017. Resilience of understory vegetation after variable retention felling in boreal Norway spruce forests – A ten-year perspective. – Forest Ecology and Management, 393, 12–28. https://doi.org/10.1016/j.foreco.2017.02.040.10.1016/j.foreco.2017.02.040
- Vellak, K., Paal, J., Liira, J. 2003. Diversity and distribution pattern of bryophytes and vascular plants in a boreal spruce forest. – Silva Fennica, 37(1), 3–13. https://doi.org/10.14214/sf.508.
- Walmsley, J.D., Jone, D.L., Reynolds, B., Price, M.H., Healey, J.R. 2009. Whole tree harvesting can reduce second rotation forest productivity. – Forest Ecology and Management, 257(3), 1104–1111. https://doi.org/10.1016/j.foreco.2008.11.015.