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Artificial canopy gaps in the restoration of boreal conservation areas: long-term effects on tree seedling establishment in pine-dominated forests

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Abstract

Creation of canopy gaps can be used as a restoration measure to aid in the diversification of structural variability and tree species composition in forests. However, it is not generally known how the specific properties of gaps influence restoration success. In this study, we examined tree seedling regeneration in 94 small canopy gaps that were established for restoration purposes in two protected Pinus sylvestris (Scots pine)-dominated forests in eastern Finland 10 years earlier. In particular, we assessed the effect of gap size, within-gap position, and soil preparation (exposure of the mineral soil) within the gaps (soil disturbance) on seedling establishment. We found that tree species composition in the sample plots consisted mainly of P. sylvestris (73 %) and Betula spp. (16 %) seedlings. Most Pinus and Betula seedlings were found in the disturbed plots, and only 6 % of the seedlings were found in the undisturbed plots (no soil preparation applied). The mean number of pooled Pinus and Betula seedlings per disturbed plot (40 × 60 cm) was 0.5 and 0.1, respectively. Mean height of the Pinus and Betula seedlings was 9.2 cm and 51.5 cm, respectively, which suggests that seedling development in the disturbed plots was very slow and is probably hindered by an insufficient amount of solar radiation reaching the forest floor, as well as by root competition with the trees that surround the gap. Both factors are affected by gap size, which was probably not large enough (mean diameter ≤23 m) in our study forests to reach a threshold value that meets the requirements of Pinus and Betula seedlings. We conclude that the creation of small canopy gaps does not appear to be an effective method to restore the age class structure and tree species composition in boreal pine-dominated forests. Further studies that manipulate the gap size more widely than this current study are needed.

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References

  • Axelsson EP, Lundmark T, Högberg P, Nordin A (2014) Belowground competition directs spatial patterns of seedling growth in Boreal forests in Fennoscandia. Forests 5:2106–2121

    Article  Google Scholar 

  • Bates D, Maechler M, Bolker B, Walker S (2014) lme4: linear mixed-effects models using Eigen and S4. R package version 1.1-7. http://CRAN.Rproject.org/package=lme4

  • Björkman E, Lundeberg G (1971) Studies on root competition in a poor pine forest by supply of labeled nitrogen and phosphorus. Stud For Suec 94:1–16

    Google Scholar 

  • Cajander AK (1949) Forest types and their significance. Acta For Fenn 56:1–71

    Google Scholar 

  • Canham CD, Denslow JS, Platt WJ, Runkle JR, Spies TA, White PS (1990) Light regimes beneath closed canopies and tree-fall gaps in temperate and tropical forests. Can J For Res 20:620–631

    Article  Google Scholar 

  • Casper BB, Jackson RB (1997) Plant competition underground. Annu Rev Ecol Syst 28:545–570

    Article  Google Scholar 

  • Chapin FS, Bloom AJ, Field CB, Waring RH (1987) Plant responses to multiple environmental factors. Bioscience 37:49–57

    Article  Google Scholar 

  • Coates KD (2000) Conifer seedling response to northern temperate canopy gaps. For Ecol Manage 127:249–269

    Article  Google Scholar 

  • Coomes DA, Grubb PJ (2000) Impacts of root competition in forests and woodlands: a theoretical framework and review of experiments. Ecol Monogr 70(2):171–207

    Article  Google Scholar 

  • Gray AN, Spies TA (1996) Gap size, within-gap position and canopy structure effects on conifer seedling establishment. J Ecol 84:635–645

    Article  Google Scholar 

  • Halme P, Allen KA, Auniņš A, Bradshaw RHW, Brūmelis G, Čada V, Clear JL, Eriksson A-M, Hannon G, Hyvärinen E, Ikauniece S, Iršėnaitė R, Jonsson BG, Junninen K, Kareksela S, Komonen A, Kotiaho JS, Kouki J, Kuuluvainen T, Mazziotta A, Mönkkönen M, Nyholm K, Oldén A, Shorohova E, Strange N, Toivanen T, Vanha-Majamaa I, Wallenius T, Ylisirniö A-L, Zin E (2013) Challenges of ecological restoration: lessons from forests in northern Europe. Biol Conserv 167:248–256

    Article  Google Scholar 

  • Hekkala A-M, Tarvainen O, Tolvanen A (2014) Dynamics of understory vegetation after restoration of natural characteristics in the boreal forests in Finland. For Ecol Manage 330:55–66

    Article  Google Scholar 

  • Hille M, den Ouden J (2004) Improved recruitment and early growth of Scots pine (Pinus sylvestris L.) seedlings after fire and soil scarification. Eur J Forest Res 123:213–218

    Article  Google Scholar 

  • Hökkä H, Repola J, Moilanen M, Saarinen M (2011) Seedling survival and establishment in small canopy openings in drained spruce mires in northern Finland. Silva Fenn 45(4):633–645

    Article  Google Scholar 

  • Hökkä H, Repola J, Moilanen M, Saarinen M (2012) Seedling establishment on small cutting areas with or without site preparation in a drained spruce mire—a case study in northern Finland. Silva Fenn 46(5):695–705

    Article  Google Scholar 

  • Hothorn T, Bretz F, Westfall P (2008) Simultaneous inference in general parametric models. Biom J 50(3):346–363

    Article  PubMed  Google Scholar 

  • Hynynen J (1993) Self-thinning models for even-aged stands of Pinus sylvestris, Picea abies and Betula pendula. Scand J For Res 8(3):326–336

    Article  Google Scholar 

  • Hynynen J, Niemistö P, Viherä-Aarnio A, Brunner A, Hein S, Velling P (2010) Silviculture of birch (Betula pendula Roth and Betula pubescens Ehrh.) in northern Europe. Forestry 83:103–119

    Article  Google Scholar 

  • Kalliokoski T, Nygren P, Sievänen R (2008) Coarse root architecture of three boreal tree species growing in mixed stands. Silva Fenn 42(2):189–210

    Article  Google Scholar 

  • Kellomäki S (2005) Metsäekologia. Silva Carelica 7. Joensuun yliopisto

  • Kuuluvainen T (1994) Gap disturbance, ground microtopography, and the regeneration dynamics of boreal coniferous forests in Finland: a review. Ann Zool Fenn 31(1):35–51

    Google Scholar 

  • Kuuluvainen T (2002) Natural variability of forests as a reference for restoring and managing biological diversity in boreal Fennoscandia. Silva Fenn 36(1):97–125

    Google Scholar 

  • Kuuluvainen T, Aakala T (2011) Natural forest dynamics in boreal Fennoscandia: a review and classification. Silva Fenn 45(5):823–841

    Article  Google Scholar 

  • Kuuluvainen T, Grenfell R (2012) Natural disturbance emulation in boreal forest ecosystem management—theories, strategies, and a comparison with conventional even-aged management. Can J For Res 42(7):1185–1203

    Article  Google Scholar 

  • Kuuluvainen T, Juntunen P (1998) Seedling establishment in relation to microhabitat variation in a windthrow gap in a boreal Pinus sylvestris forest. J Veg Sci 9(4):551–562

    Article  Google Scholar 

  • Kuuluvainen T, Kalmari R (2003) Regeneration microsites of Picea abies seedlings in a windthrow area of a boreal old-growth forest in southern Finland. Ann Bot Fenn 40:401–413

    Google Scholar 

  • Kuuluvainen T, Ylläsjärvi I (2011) On the natural regeneration of dry heath forests in Finnish Lapland: a review of V. T. Aaltonen (1919). J For Res 26(S10):34–44

    Google Scholar 

  • Lieffers VJ, Messier KJ, Stadt F, Gendron F, Comeau PG (1999) Predicting and managing light in the understory of Boreal forests. Can J For Res 29:796–811

    Article  Google Scholar 

  • Lindenmayer DB, Franklin JF, Lõhmus A, Baker SC, Bauhus J, Beese W, Brodie A, Kiehl B, Kouki J, Martinez Pastur G, Messier C, Neyland M, Palik B, Sverdrup-Thygeson A, Volney J, Wayne A, Gustafsson L (2012) A major shift to the retention approach for forestry can help resolve some global forest sustainability issues. Conserv Lett 5:421–431

    Article  Google Scholar 

  • Liu Q-H, Hytteborn H (1991) Gap structure, disturbance and regeneration in a primeval Picea abies forest. J Veg Sci 2:391–402

    Article  Google Scholar 

  • Long JN (2009) Emulating natural disturbance regimes as a basis for forest management: a North American view. For Ecol Manag 257:1868–1873

    Article  Google Scholar 

  • McCarthy J (2001) Gap dynamics of forest trees: a review with particular attention to boreal forests. Environ Rev 9:1–59

    Article  Google Scholar 

  • Mitchell SJ (2012) Wind as a natural disturbance agent in forests: a synthesis. Forestry 86:147–157

    Article  Google Scholar 

  • Nilsson M-C, Wardle DA (2005) Understory vegetation as a forest ecosystem driver: evidence from the northern Swedish boreal forest. Front Ecol Environ 3(8):421–428

    Article  Google Scholar 

  • Perera AH, Buse LJ, Weber MG (eds) (2004) Emulating natural forest landscape disturbances: concepts and applications. Columbia University Press, New York

    Google Scholar 

  • Pirinen J, Kersalo J (eds) (2009) Suomen maakuntien ilmasto. Yliopistopaino, Helsinki

    Google Scholar 

  • Puettmann KJ, Wilson SMG, Baker SC, Donoso PJ, Drössler L, Amente G, Harvey BD, Knoke T, Yuanchang L, Nocentini S, Putz FE, Yoshida T, Bauhus J (2015) Silvicultural alternatives to conventional even-aged forest management-what limits global adoption? For Ecosyst 2:8

    Article  Google Scholar 

  • R Core Team (2014) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. http://www.R-project.org/

  • Rouvinen S, Kouki J (2011) Tree regeneration in artificial canopy gaps established for restoring natural structural variability in a Scots pine stand. Silva Fenn 45(5):1079–1091

    Article  Google Scholar 

  • Ruuska J, Siipilehto J, Valkonen S (2008) Effect of edge stands on the development of young Pinus sylvestris stands in southern Finland. Scand J For Res 23:214–226

    Article  Google Scholar 

  • Ruxton GD (2006) The unequal variance t-test is an underused alternative to Student’s t-test and the Mann-Whitney U test. Behav Ecol 17:688–690

    Article  Google Scholar 

  • Similä M, Junninen K (eds) (2012) Ecological restoration and management in Boreal forests: best practices from Finland. Metsähallitus, Natural Heritage Services, Vantaa

    Google Scholar 

  • Steijlen I, Nilsson M-C, Zackrisson O (1995) Seed regeneration of Scots pine in boreal forest stands dominated by lichen and feather moss. Can J For Res 25:713–723

    Article  Google Scholar 

  • Ulanova NG (2000) The effects of windthrow on forests at different spatial scales: a review. For Ecol Manag 135(1):155–167

    Article  Google Scholar 

  • Yli-Vakkuri P (1962) Emergence and initial development of tree seedlings on burnt-over forest land. Acta For Fenn 74(1):1–50

    Google Scholar 

  • Zackrisson O, Nilsson M-C, Steijlen I, Hörnberg G (1995) Regeneration pulses and climate vegetation interactions in nonpyrogenic boreal Scots pine stands. J Ecol 83:469–483

    Article  Google Scholar 

Download references

Acknowledgments

We thank Metsähallitus for creating the canopy gaps in both study areas and Lauri Mehtätalo for assistance in statistical analyses.

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Authors and Affiliations

  1. School of Forest Sciences, University of Eastern Finland, P.O. Box 111, 80101, Joensuu, Finland

    Hannes Pasanen, Seppo Rouvinen & Jari Kouki

Authors
  1. Hannes Pasanen
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  2. Seppo Rouvinen
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  3. Jari Kouki
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Correspondence to Hannes Pasanen.

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Communicated by Dr. Gediminas Brazaitis.

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Pasanen, H., Rouvinen, S. & Kouki, J. Artificial canopy gaps in the restoration of boreal conservation areas: long-term effects on tree seedling establishment in pine-dominated forests. Eur J Forest Res 135, 697–706 (2016). https://doi.org/10.1007/s10342-016-0965-8

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  • DOI: https://doi.org/10.1007/s10342-016-0965-8

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