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Table 1 Replicated retention and restoration experiments in Fennoscandia. Note that abbreviations or names may not be official. Numbers after each abbreviation indicate source for information (see footnote). Establ = year of establishing the experiment; Durat = realized or planned duration (Long-term = more than 10 years); Type = dominant tree species (Mixed = deciduous and coniferous); the subsequent six columns explain applied treatments as follows: Rete = retention trees in clear felled sites; Gap = gap felling (diameter up to about 50 m); Select = selection felling; CWD = coarse dead wood manipulation (usually high stumps); Fire = prescribed burning applied; Other = possible other variables included in the experimental design. The bottom-part columns show studied taxa or other assessed aspects: Veget = understory vegetation (vascular plants, forest floor mosses and lichens); Epiph = epiphytic and epixylic lichens and bryophytes (epix = epixylic species distinguished); Polyp = polypore fungi; Ground = ground-dwelling beetles and spiders; Saprox = saproxylic and other actively-flying beetles; Other = other taxa; CWD = coarse woody debris inventoried; Timber = timber production assessed; Social = aesthetic or recreational values assessed; and Econ. = economic viability of the applied operations assessed. * = to our knowledge, results not yet published in peer-reviewed English-language journals

From: Experimental evidence on biodiversity impacts of variable retention forestry, prescribed burning, and deadwood manipulation in Fennoscandia

General information about experiments
AbbreviationExperiment nameCountryEstablDuratTypeReteGapSelectCWDFireOther
NaturKultur 1NaturKultur (2050–2061)Sweden1989Long-termMixed  X  Planting
Härjedalen 2Conventional clear-cutting and variable thinningSweden1989Long-termPine, Spruce  X   
Fagerön 3High-stump experimentSweden19945 yearsMixed  XX  
MONTA 4Biodiversity in the regeneration of managed forestsFinland1995Long-termSpruceXXXX  
Snöberget 5Selection cutting experimentSweden19975 yearsSpruce  X   
RETREE 6Effect of the size of retention tree groups on biodiversity in forest regenerationFinland1998Long-termSpruceX    Moisture
FIRE 7Boreal forest fire experimentFinland2000Long-termPineX   X 
Medelpad-Ångermanland 8Retention tree group size and biodiversitySweden2000UnknownMixedX     
EVO 9Rehabilitating boreal forest structure and species compositionFinland2001Long-termSpruceX  XXMoisture
Oak forest 10Partial cutting in mixed oak forestsSweden2001Long-termOak, mixed  X   
Deadwood 11Deadwood addition follow-upFinland2002Long-termPine, spruce   X Felling, girdling
Hedmark 12High-stump experimentNorway20042 yearsMixed     Edge distance
PuroMONTA 13Importance of valuable boreal brook habitats in conserving species richnessFinland2004Long-termSpruce  XX Brook sides
UPM experiment 14Effects of logging, mounding, and removal of logging residues and stumpsFinland20053 yearsSpruceX  X  
DISTDYN 15Forest management inspired by natural disturbance dynamicsFinland2009Long-termPine, spruceXXXX  
AbbreviationExperiment nameCountryEstablDuratTypeReteGapSelectCWDFireOther
Eriksköp 16Target diameter cuttingSweden2009Long-termPine, spruce  X   
Future Forest 17Restoration strategies for the futureSweden2010Long-termPine, spruce X  X 
Spruce CWD 18Addition of spruce CWDSweden2011UnknownSpruce   X  
Rogberga 19Target diameter cuttingSweden2012Long-termMixed XX   
Shelterwood 20Shelterwood cutting experimentEstonia2012Long-termPine  X  Shelterwood
Effaråsen 21Economic and ecological impact of partial cutting, CWD creation and prescribed burning in boreal pine forestSweden2012Long-termPineX  XX 
UNEVEN 22The efficiency of uneven-aged forestry as a conservation toolSweden2013Long-termSpruce  X   
Sampled species groups and other aspects
NaturKulturX*      XX*X*
Fagerön    X     
MONTAXXepixX*XXAnts*, snails*, soil fauna, decomposers, small mammals*XX X
Snöberget X        
RETREEXXepix X Snails*XX*  
FIREXXXXXFlat bugs, flies, pollinators, bats, mycorrhizaX   
Medelpad-Ångermanland Xepix        
Oak forestXXX XFungus gnatsX   
Deadwood  X       
Hedmark    X     
UPM experimentXXepix    X   
DISTDYNX X XAnts*, birds*XX*XX*
EriksköpX*      X  
Future ForestXXX XFlat bugsX   
Spruce CWD  X       
RogbergaX*      X*  
EffaråsenXXX XMycorrhiza*XX X
  1. 1 Djupström and Weslien 2019; 2 Hagner 1992; 3 Lindhe and Lindelöw 2004; 4 Kaila 1998; 5 Hedenås and Ericson 2003; 6 Matveinen-Huju et al. 2006, Vanha-Majamaa and Hautala. 2010; 7 Hyvärinen et al. 2005; Kouki 2019; 8 Perhans et al. 2009; 9 Toivanen et al. 2004, Lilja et al. 2005, Vanha-Majamaa et al. 2007; 10 Götmark 2007; 11 Pasanen 2017; 12 Fossestol and Sverdrup-Thygeson 2009; 13 Toivanen et al. 2004, Selonen and Kotiaho 2013; 14 Rabinowitsch-Jokinen and Vanha-Majamaa 2010; 15 Koivula et al. 2014; 16 Drössler 2016; 17 Hägglund et al. 2015; 18 Olsson et al. 2011; 19 Drössler 2016; 20 Tullus et al. 2019; 21 Djupström and Weslien 2019; 22 Joelsson et al. 2017