Supplementary material
Table S1 Correlations among soil characteristics in horizons A, cor. coefficients > 0.5 displayed in bold. Abbreviations: SBD = soil bulk density, AWC = available water capacity, CEC = cation-exchange capacity. See Material and methods section for details.
Organic matter / Soluble salts / pH / NO3 / NH4 / Ca / Mg / K / Na / Al / Fe / Mn / Cu / Zn / B / P / acidity / CEC / AWC / SBD / C/N ratio1.00 / -0.01 / -0.07 / -0.16 / -0.02 / 0.12 / -0.11 / 0.07 / 0.13 / 0.57 / 0.17 / 0.42 / 0.23 / 0.14 / -0.15 / 0.01 / 0.12 / 0.17 / -0.11 / 0.60 / -0.33 / Organic matter
-0.01 / 1.00 / -0.02 / 0.40 / -0.06 / 0.05 / 0.11 / 0.08 / -0.13 / 0.07 / -0.35 / 0.07 / -0.18 / -0.03 / -0.10 / 0.25 / 0.13 / 0.22 / 0.17 / -0.12 / -0.05 / Soluble salts
-0.07 / -0.02 / 1.00 / 0.01 / 0.00 / 0.58 / 0.29 / 0.78 / 0.18 / -0.51 / -0.19 / 0.25 / -0.08 / 0.48 / -0.35 / 0.44 / -0.72 / -0.09 / -0.22 / 0.01 / 0.03 / pH
-0.16 / 0.40 / 0.01 / 1.00 / 0.37 / 0.24 / 0.23 / 0.12 / 0.13 / -0.32 / -0.35 / -0.19 / 0.00 / -0.06 / 0.05 / -0.03 / -0.09 / 0.37 / 0.30 / -0.42 / 0.25 / NO3
-0.02 / -0.06 / 0.00 / 0.37 / 1.00 / 0.12 / 0.12 / 0.01 / 0.24 / -0.11 / -0.03 / -0.03 / 0.30 / 0.06 / 0.11 / -0.05 / -0.09 / 0.18 / 0.30 / -0.05 / 0.04 / NH4
0.12 / 0.05 / 0.58 / 0.24 / 0.12 / 1.00 / 0.66 / 0.53 / 0.14 / -0.28 / -0.26 / 0.23 / -0.11 / 0.26 / -0.46 / 0.33 / -0.55 / 0.55 / -0.10 / 0.01 / 0.07 / Ca
-0.11 / 0.11 / 0.29 / 0.23 / 0.12 / 0.66 / 1.00 / 0.18 / -0.09 / -0.34 / -0.28 / -0.08 / -0.27 / 0.06 / -0.48 / 0.10 / -0.37 / 0.44 / -0.10 / -0.27 / 0.14 / Mg
0.07 / 0.08 / 0.78 / 0.12 / 0.01 / 0.53 / 0.18 / 1.00 / 0.13 / -0.22 / -0.08 / 0.47 / 0.13 / 0.40 / -0.33 / 0.41 / -0.57 / 0.04 / -0.15 / 0.20 / -0.16 / K
0.13 / -0.13 / 0.18 / 0.13 / 0.24 / 0.14 / -0.09 / 0.13 / 1.00 / -0.01 / 0.10 / 0.07 / 0.16 / 0.06 / 0.13 / 0.03 / -0.30 / -0.07 / 0.12 / 0.17 / 0.00 / Na
0.57 / 0.07 / -0.51 / -0.32 / -0.11 / -0.28 / -0.34 / -0.22 / -0.01 / 1.00 / 0.49 / 0.44 / 0.24 / -0.11 / 0.06 / -0.01 / 0.54 / 0.12 / -0.03 / 0.66 / -0.45 / Al
0.17 / -0.35 / -0.19 / -0.35 / -0.03 / -0.26 / -0.28 / -0.08 / 0.10 / 0.49 / 1.00 / 0.16 / 0.35 / -0.01 / 0.21 / -0.11 / 0.14 / -0.18 / -0.19 / 0.42 / -0.27 / Fe
0.42 / 0.07 / 0.25 / -0.19 / -0.03 / 0.23 / -0.08 / 0.47 / 0.07 / 0.44 / 0.16 / 1.00 / 0.36 / 0.37 / -0.21 / 0.20 / -0.02 / 0.11 / 0.00 / 0.59 / -0.36 / Mn
0.23 / -0.18 / -0.08 / 0.00 / 0.30 / -0.11 / -0.27 / 0.13 / 0.16 / 0.24 / 0.35 / 0.36 / 1.00 / 0.24 / 0.30 / 0.00 / -0.07 / -0.15 / 0.05 / 0.27 / -0.17 / Cu
0.14 / -0.03 / 0.48 / -0.06 / 0.06 / 0.26 / 0.06 / 0.40 / 0.06 / -0.11 / -0.01 / 0.37 / 0.24 / 1.00 / -0.19 / 0.19 / -0.35 / -0.11 / -0.05 / 0.25 / -0.24 / Zn
-0.15 / -0.10 / -0.35 / 0.05 / 0.11 / -0.46 / -0.48 / -0.33 / 0.13 / 0.06 / 0.21 / -0.21 / 0.30 / -0.19 / 1.00 / -0.23 / 0.17 / -0.30 / 0.18 / -0.14 / 0.01 / B
0.01 / 0.25 / 0.44 / -0.03 / -0.05 / 0.33 / 0.10 / 0.41 / 0.03 / -0.01 / -0.11 / 0.20 / 0.00 / 0.19 / -0.23 / 1.00 / -0.26 / 0.05 / -0.06 / 0.22 / -0.20 / P
0.12 / 0.13 / -0.72 / -0.09 / -0.09 / -0.55 / -0.37 / -0.57 / -0.30 / 0.54 / 0.14 / -0.02 / -0.07 / -0.35 / 0.17 / -0.26 / 1.00 / 0.34 / 0.23 / 0.10 / -0.09 / acidity
0.17 / 0.22 / -0.09 / 0.37 / 0.18 / 0.55 / 0.44 / 0.04 / -0.07 / 0.12 / -0.18 / 0.11 / -0.15 / -0.11 / -0.30 / 0.05 / 0.34 / 1.00 / 0.17 / -0.02 / 0.06 / CEC
-0.11 / 0.17 / -0.22 / 0.30 / 0.30 / -0.10 / -0.10 / -0.15 / 0.12 / -0.03 / -0.19 / 0.00 / 0.05 / -0.05 / 0.18 / -0.06 / 0.23 / 0.17 / 1.00 / -0.07 / 0.03 / AWC
0.60 / -0.12 / 0.01 / -0.42 / -0.05 / 0.01 / -0.27 / 0.20 / 0.17 / 0.66 / 0.42 / 0.59 / 0.27 / 0.25 / -0.14 / 0.22 / 0.10 / -0.02 / -0.07 / 1.00 / -0.54 / SBD
-0.33 / -0.05 / 0.03 / 0.25 / 0.04 / 0.07 / 0.14 / -0.16 / 0.00 / -0.45 / -0.27 / -0.36 / -0.17 / -0.24 / 0.01 / -0.20 / -0.09 / 0.06 / 0.03 / -0.54 / 1.00 / C/N ratio
Table S2 Correlations among litter characteristics, cor. coefficients > 0.5 displayed in bold. See Material and methods section for details.
bare soil / litter depth / litter / solid compound / P / N / C / cellulose / lignin1.00 / -0.11 / 0.02 / 0.24 / -0.10 / -0.22 / -0.51 / -0.01 / -0.37 / bare soil
-0.11 / 1.00 / 0.19 / -0.11 / -0.20 / -0.19 / 0.38 / 0.36 / 0.09 / litter depth
0.02 / 0.19 / 1.00 / -0.24 / -0.28 / -0.61 / 0.31 / 0.21 / -0.28 / litter
0.24 / -0.11 / -0.24 / 1.00 / 0.00 / -0.14 / -0.58 / -0.29 / 0.08 / solid compound
-0.10 / -0.20 / -0.28 / 0.00 / 1.00 / 0.69 / -0.12 / 0.04 / -0.02 / P
-0.22 / -0.19 / -0.61 / -0.14 / 0.69 / 1.00 / -0.01 / -0.14 / 0.27 / N
-0.51 / 0.38 / 0.31 / -0.58 / -0.12 / -0.01 / 1.00 / 0.38 / 0.23 / C
-0.01 / 0.36 / 0.21 / -0.29 / 0.04 / -0.14 / 0.38 / 1.00 / -0.04 / cellulose
-0.37 / 0.09 / -0.28 / 0.08 / -0.02 / 0.27 / 0.23 / -0.04 / 1.00 / lignin
Table S3 Correlations among activity of enzymes, cor. coefficients > 0.5 displayed in bold. See Material and methods section for details.
MUFG / MUFP / MUFC / MUFX / MUFN / MUFU / MUFA / MUFL / AMCA / AMCL / total1.00 / 0.55 / 0.93 / 0.72 / 0.70 / 0.57 / 0.58 / 0.61 / 0.46 / 0.34 / 0.83 / MUFG
0.55 / 1.00 / 0.55 / 0.80 / 0.85 / 0.82 / 0.80 / 0.56 / 0.22 / 0.13 / 0.78 / MUFP
0.93 / 0.55 / 1.00 / 0.79 / 0.64 / 0.62 / 0.70 / 0.73 / 0.59 / 0.36 / 0.87 / MUFC
0.72 / 0.80 / 0.79 / 1.00 / 0.76 / 0.88 / 0.91 / 0.54 / 0.47 / 0.25 / 0.84 / MUFX
0.70 / 0.85 / 0.64 / 0.76 / 1.00 / 0.69 / 0.75 / 0.66 / 0.22 / 0.10 / 0.79 / MUFN
0.57 / 0.82 / 0.62 / 0.88 / 0.69 / 1.00 / 0.89 / 0.49 / 0.38 / 0.23 / 0.77 / MUFU
0.58 / 0.80 / 0.70 / 0.91 / 0.75 / 0.89 / 1.00 / 0.70 / 0.52 / 0.30 / 0.85 / MUFA
0.61 / 0.56 / 0.73 / 0.54 / 0.66 / 0.49 / 0.70 / 1.00 / 0.40 / 0.22 / 0.76 / MUFL
0.46 / 0.22 / 0.59 / 0.47 / 0.22 / 0.38 / 0.52 / 0.40 / 1.00 / 0.86 / 0.69 / AMCA
0.34 / 0.13 / 0.36 / 0.25 / 0.10 / 0.23 / 0.30 / 0.22 / 0.86 / 1.00 / 0.56 / AMCL
0.83 / 0.78 / 0.87 / 0.84 / 0.79 / 0.77 / 0.85 / 0.76 / 0.69 / 0.56 / 1.00 / total
Table S4 List of all full species names in herb layer found on plots during three years of study (2013–2015). The species presented in less than 3 cases (at least on one plot during three years or at three plots in one year) were excluded from the analysis. Plant species nomenclature follows Kubát et al. (2002).
Full name / AbbreviationAcer platanoides / Acerplat
Acer pseudoplatanus / Acerpseu
Athyriumfilix-femina / Athyfili
Carexdigitata / Caresp.
Carpinusbetulus / Carpbetu
Circaealutetiana / Circlute
Dryopterisdilatata / Dryodila
Dryopterisfilix-mas / Dryofili
Elymuscaninus / Elymcani
Epilobiummontanum / Epilmont
Fagussylvatica / Fagusylv
Fallopia convolvulus / Fallconv
Festucagigantea / Festgiga
Fraxinus excelsior / Fraxexce
Galeobdolonmontanum / Galemont
Galeobdolonluteum / Galelute
Galeopsis bifida / Galebifi
Galeopsispubescens / Galepube
Galeopsisspeciosa / Galespec
Galeopsistetrahit / Galetetr
Galiumaparine / Galiapar
Geranium robertianum / Gerarobe
Geumurbanum / Geumurba
Glechomahederacea / Glechede
Heracleumsphondylium / Heraspho
Hieraciumlachenalii / Hierlach
Hypericumperforatum / Hypeperf
Impatiens glandulifera / Impaglan
Impatiens noli-tangere / Impanoli
Impatiens parviflora / Impaparv
Lysimachianummularia / Lysinumm
Melicanutans / Melinuta
Menthaarvensis / Mentarve
Moehringiatrinervia / Moehtrin
Oxalis acetosella / Oxalacet
Oxalis fontana / Oxalfont
Persicariahydropiper / Pershydr
Poanemoralis / Poanemo
Poatrivialis / Poatriv
Populustremula / Poputrem
Prunusserotina / Prunsero
Qercusrobur / Qercrobu
Ranunculusrepens / Ranurepe
Rubusfruticosusagg. / Rubufrut
Rubusidaeus / Rubuidae
Rumexobtusifolius / Rumeobtu
Sambucusnigra / Sambnigr
Sorbusaucuparia / Sorbaucu
Scrophularianodosa / Scronodo
Stellaria media / Stelmedi
Tiliacordata / Tilicord
Torilis japonica / Torijapo
Urticadioica / Urtidioi
Vacciniummyrtillus / Vaccmyrt
Veronica chamaedrys / Verocham
Viola reichenbachiana / Violreic
Fig. S1 Soil characteristics in relation to dominant canopy tree (oak and spruce), year treatment (UN – uninvaded, RE – invader removal, IN –invaded plots) and soil horizon (A = 0–5cm, B = 5–10cm). Height of bars show mean value of each variable; error bars standard error of mean.
Fig. S2 Litter, herb community composition and other environmental characteristics in relation to dominant canopy tree (oak and spruce), year treatment (UN – uninvaded, RE – invader removal, IN invaded plots). Height of bars represent mean value of each variable; error bars show standard error of mean.
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