SUPPLEMENTARY MATERIAL:

Evolution of temperature, major and trace element concentration with

time in three mesocosmes

Figure S1. Evolution of temperature in the course of mesocosm experiments: A, lichen;

B, peat; C, ash of lichen. Left column, large lake and right column, small lake.

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Figure S2. Al evolution in large (A) and small (B) lake water mesocosm in the course of experiment.

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242526

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Figure S3. Many trace elements demonstrated a pattern of concentration on time

dependence that followed either DOC, S.C. or Fe : A, B, C, D, E, F, G, H for Si, K, Ca,

Mg, Ni, Pb, Zn and U element.

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Figure S3. Continued

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Table S1. Chemical composition of peat, lichen and ash used in the mesocosm experiments (ppm of dry weight, unless indicated) .

Component Peat Lichen Ash of Lichen

C, % 46.2 44.9 20.4N, % 0.69 0.49 0.434

B 3.99 6.55 8.07Li 0.568 0.107 1.83Na 310 54.8 386Mg 400 143 2233Al 2042 277 4752Si N.D. N.D. 1162P 331 39.8 3695S 361 161 N.D.K 786 729 10510Ca 1157 248 7575Ti 153 7.09 83V 3.04 0.49 8.07Cr 4.39 0.80 5.24Mn 13.9 16.6 571Fe 1135 85.0 3252Co 0.30 0.068 1.22Ni 2.25 0.563 8.87Cu 2.83 0.842 21.8Zn 19.7 13.7 163Ga 0.60 0.076 0.770As 1.58 0.183 0.874Rb 2.83 2.41 37.1Sr 8.39 1.71 21.2Y 0.600 0.084 1.20Zr 3.19 0.393 1.14Nb 0.402 0.046 0.442Mo 0.150 0.023 0.405Cd 0.172 0.071 0.414Sb 0.383 0.026 0.203Cs 0.189 0.078 1.62Ba 23.8 3.87 55.8La 1.07 0.133 2.58Ce 2.15 0.248 5.02Pr 0.241 0.031 0.573Nd 0.902 0.080 2.13Yb 0.064 0.008 0.097Hf 0.093 0.012 0.122W 0.075 0.018 0.392Pb 11.1 1.35 0.245Th 0.233 0.026 23.4U 0.072 0.009 0.467

Table S2-A. Results of non-parametric statistical tests of the difference between peat, lichen and ash addition in both lakes, considering full duration of the experiment.

5

5051

5253

component

Kruskal-Wallis(H-test)

peat-ash-lichenMann-Whitney (U-test)

H p-levelpeat-lichen peat-ash ash-lichen

U Z p-level U Z p-level U Z p-levelS.C. 22.9 < 0.0001 336 -0.918 0.359 145 -4.06 < 0.0001 141 4.11 < 0.0001pH 47.7 < 0.0001 381 -0.188 0.851 28 -5.96 < 0.0001 28 5.96 < 0.0001

DOC 12.6 0.0018 376 0.0421 0.966 196 2.91 0.0036 168 -3.26 0.0011DIC 44.9 < 0.0001 305 -0.802 0.423 28 -5.82 < 0.0001 21 5.73 < 0.0001

SUVA 33.3 < 0.0001 52 5.05 < 0.0001 62 4.54 < 0.0001 184 1.94 0.0524Li 57.3 < 0.0001 263 2.11 0.0345 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001B 24.9 < 0.0001 363 0.475 0.635 154 -3.9 < 0.0001 108 4.65 < 0.0001

Na 12.9 0.0016 291 1.66 0.0979 272 -1.97 0.0493 175 3.56 0.0004Mg 59.4 < 0.0001 209 -3 0.0027 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Al 59.2 < 0.0001 204 3.08 0.0021 3.5 -6.37 < 0.0001 < 0.0001 6.42 < 0.0001Si 33.1 < 0.0001 392 < 0.0001 1 87 -5 < 0.0001 91 4.93 < 0.0001P 55.3 < 0.0001 384 0.131 0.896 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001K 56.7 < 0.0001 285 -1.75 0.0795 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001

Ca 54.4 < 0.0001 260 -2.17 0.0299 20 -6.1 < 0.0001 < 0.0001 6.42 < 0.0001Ti 55.4 < 0.0001 363 0.475 0.635 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001V 57.8 < 0.0001 250 2.33 0.02 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Cr 0.116 0.944 375 0.279 0.781 375 0.279 0.781 382 0.164 0.87

Mn 68 < 0.0001 < 0.0001 -6.42 < 0.0001 5 -6.34 < 0.0001 56 5.51 < 0.0001Fe 8.1 0.017 306 1.41 0.159 282 -1.8 0.0715 231 2.64 0.0083Co 7.21 0.027 383 0.147 0.883 246 -2.39 0.0167 255 2.24 0.0248Ni 4.88 0.049 306 -1.41 0.159 257 -2.21 0.027 353 0.639 0.523Cu 3.66 0.161 345 -0.778 0.436 281 -1.82 0.0689 316 1.25 0.213Zn 1.63 0.442 350 0.688 0.491 343 -0.803 0.422 321 1.16 0.245Ga 54.2 < 0.0001 320 -1.18 0.238 2 -6.39 < 0.0001 11 6.24 < 0.0001Ge 50.4 < 0.0001 209 -1.80 0.0714 < 0.0001 -5.93 < 0.0001 < 0.0001 6.12 < 0.0001As 59.6 < 0.0001 203 3.1 0.002 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Rb 56.2 < 0.0001 307 -1.39 0.164 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Sr 57.4 < 0.0001 239 2.51 0.0122 6 -6.33 < 0.0001 < 0.0001 6.42 < 0.0001Y 29.1 < 0.0001 336 -0.918 0.359 87 -5 < 0.0001 136 4.2 < 0.0001Zr 7.81 0.02 264 2.1 0.0359 370 -0.36 0.718 229 2.67 0.0076Nb 23.5 < 0.0001 344 0.787 0.432 150 -3.97 < 0.0001 128 4.33 < 0.0001Mo 52.2 < 0.0001 297 1.56 0.12 < 0.0001 -6.42 < 0.0001 28 5.96 < 0.0001Cd 7.18 0.0277 237 -2.54 0.0111 269 -2.02 0.0438 366 -0.434 0.664Sb 62 < 0.0001 157 -3.85 0.0001 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Cs 19.1 0.0001 264 -2.1 0.0359 137 -4.18 < 0.0001 234 2.59 0.0096Ba 0.249 0.883 377 0.246 0.806 375 -0.279 0.781 363 0.483 0.629La 0.137 0.934 376 0.262 0.793 377 0.246 0.806 371 -0.344 0.731Ce 0.038 0.981 375 0.279 0.781 390 0.0328 0.974 391 -0.0164 0.987Pr 33.9 < 0.0001 325 -1.1 0.272 78 -5.15 < 0.0001 99 4.8 < 0.0001Nd 41.3 < 0.0001 321 -1.16 0.245 37 -5.82 < 0.0001 78 5.15 < 0.0001Sm 40.2 < 0.0001 308 -1.38 0.169 43 -5.72 < 0.0001 84 5.05 < 0.0001Eu 10.9 0.0044 360 -0.524 0.6 210 -2.98 0.0029 230 2.65 0.0079Tb 25.9 < 0.0001 287 -1.72 0.0853 108 -4.65 < 0.0001 162 3.77 0.0002Gd 9.81 0.0074 340 -0.852 0.394 206 -3.05 0.0023 261 2.15 0.0318Dy 28.4 < 0.0001 282 -1.8 0.0715 82 -5.08 < 0.0001 169 3.65 0.0003Ho 31.5 < 0.0001 290 -1.67 0.0946 61 -5.42 < 0.0001 157 3.85 0.0001Er 22.5 < 0.0001 303 -1.46 0.145 109 -4.64 < 0.0001 200 3.15 0.0017Tm 24.9 < 0.0001 311 -1.33 0.184 89 -4.97 < 0.0001 192 3.28 0.001Yb 31.2 < 0.0001 361 -0.508 0.611 70.5 -5.27 < 0.0001 129 4.31 < 0.0001Lu 29.5 < 0.0001 388 -0.074 0.941 110 -4.62 < 0.0001 102 4.75 < 0.0001Hf 0.147 0.929 372 0.328 0.743 384 0.139 0.889 373 0.311 0.756W 66.1 < 0.0001 93 -4.9 < 0.0001 < 0.0001 -6.42 < 0.0001 < 0.0001 6.42 < 0.0001Tl 14 0.0009 320 -1.19 0.235 105 -4.7 < 0.0001 359 0.541 0.589Pb 17.2 0.0002 159 -3.82 0.0001 301 -1.49 0.136 209 -3 0.0027Th 54 < 0.0001 142 -4.1 < 0.0001 28 -5.96 < 0.0001 40 5.77 < 0.0001U 61.8 < 0.0001 154 -3.91 0.0001 1 -6.41 < 0.0001 2 6.39 < 0.0001

Table S2-B. Results of non-parametric statistical tests of the difference between peat, lichen and ash addition in both lakes, considering only the beginning (first 10 h) of the experiment.

TE Kruskal-Wallis(H-test)

Mann-Whitney (U-test)

6

545556

peat-ash-lichen

H p-levelpeat-lichen peat-ash ash-lichen

U Z p-level U Z p-level U Z p-levelS.C. 8.84 0.0121 80.5 -1.79 0.0734 55.5 -2.73 0.0063 87 1.55 0.122pH 24.2 < 0.0001 113 0.584 0.559 16 -4.22 < 0.0001 16 4.22 < 0.0001

DOC 8.24 0.0163 103 0.942 0.346 64 2.41 0.0159 64 -2.41 0.0159DIC 29.2 < 0.0001 108 0.474 0.635 8 -4.52 < 0.0001 < 0.0001 4.74 < 0.0001

SUVA 12.2 0.0022 38 3.08 0.0021 43 2.87 0.0041 92 0.276 0.783Li 33.2 < 0.0001 74 2.04 0.0418 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001B 31.5 < 0.0001 111 0.641 0.522 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001

Na 10.8 0.0046 79 1.85 0.0648 92 -1.36 0.175 41 3.28 0.0010Mg 31.6 < 0.0001 108 -0.754 0.451 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Al 32.1 < 0.0001 88 1.51 0.132 1 -4.79 < 0.0001 < 0.0001 4.82 < 0.0001Si 10.5 0.0053 126 0.075 0.94 56 -2.71 0.0067 52 2.86 0.0042P 31.5 < 0.0001 115 0.49 0.624 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001K 31.4 < 0.0001 123 -0.188 0.851 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001

Ca 31.6 < 0.0001 107 -0.791 0.429 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Ti 31.7 < 0.0001 106 0.829 0.407 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001V 33.1 < 0.0001 76 1.96 0.05 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Cr 0.276 0.871 117 0.415 0.678 115 0.49 0.624 126 0.075 0.94

Mn 41.8 < 0.0001 < 0.0001 -4.82 < 0.0001 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Fe 1.61 0.447 127 0.038 0.97 96 -1.21 0.228 102 0.98 0.327Co 9.66 0.008 121 -0.264 0.792 49 -2.98 0.0029 66 2.34 0.0195Ni 2.52 0.284 116 -0.452 0.651 86 -1.58 0.113 101 1.02 0.309Cu 2.38 0.304 120 -0.302 0.763 93 -1.32 0.187 93 1.32 0.187Zn 5.38 0.049 106 0.829 0.407 80 -1.81 0.0704 74 2.04 0.0418Ga 31.5 < 0.0001 112 0.603 0.546 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Ge 32.6 < 0.0001 71 -1.94 0.053 < 0.0001 -4.74 < 0.0001 < 0.0001 4.82 < 0.0001As 32.9 < 0.0001 78 1.88 0.06 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Rb 31.3 < 0.0001 126 0.075 0.94 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Sr 32.6 < 0.0001 80 1.81 0.0704 1 -4.79 < 0.0001 < 0.0001 4.82 < 0.0001Y 20 < 0.0001 108 -0.754 0.451 19 -4.11 < 0.0001 35 3.51 0.0005Zr 6.53 0.0383 104 0.905 0.366 80 -1.81 0.0704 65 2.37 0.0176Nb 14.5 0.0007 121 -0.264 0.792 43 -3.2 0.0014 39 3.35 0.0008Mo 27.6 < 0.0001 111 0.641 0.522 < 0.0001 -4.82 < 0.0001 16 4.22 < 0.0001Cd 3.2 0.202 105 -0.867 0.386 86 -1.58 0.113 94.5 1.26 0.207Sb 33.3 < 0.0001 73 -2.07 0.0382 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Cs 14.9 0.0006 115 -0.49 0.624 35 -3.51 0.0005 46 3.09 0.002Ba 1.68 0.432 115 0.49 0.624 107 -0.81 0.418 94.5 1.26 0.207La 0.473 0.79 111 0.641 0.522 122 -0.226 0.821 114 0.528 0.598Ce 0.433 0.805 115 0.49 0.624 117 -0.415 0.678 114 0.528 0.598Pr 20.5 < 0.0001 117 -0.415 0.678 17 -4.18 < 0.0001 33 3.58 0.0003Nd 23.1 < 0.0001 105 -0.867 0.386 12 -4.37 < 0.0001 27 3.81 0.0001Sm 22.3 < 0.0001 115 -0.49 0.624 10 -4.45 < 0.0001 32 3.62 0.0003Tb 17.7 0.0001 88 -1.51 0.132 23 -3.96 0.0001 51 2.9 0.0037Gd 6.13 0.0468 125 -0.113 0.91 61 -2.53 0.0116 83 1.7 0.0899Dy 20.9 < 0.0001 87 -1.55 0.122 14 -4.3 < 0.0001 43 3.2 0.0014Ho 19.4 0.0001 95 -1.24 0.214 15 -4.26 < 0.0001 48 3.02 0.0026Er 15.1 0.0005 99 -1.09 0.274 30 -3.69 < 0.0001 55 2.75 0.0059Tm 16.6 0.0002 89 -1.47 0.142 24 -3.92 0.0001 57 2.68 0.0075Yb 18.6 0.0001 107 -0.791 0.429 17 -4.18 < 0.0001 46 3.09 0.002Lu 19.7 0.0001 126 0.075 0.94 27 -3.81 0.0001 26 3.84 0.0001Hf 3.50 0.174 116 0.452 0.651 90.5 -1.41 0.158 82 1.73 0.083W 36.3 < 0.0001 40 -3.32 0.0009 < 0.0001 -4.82 < 0.0001 < 0.0001 4.82 < 0.0001Tl 20.3 < 0.0001 123 -0.188 0.851 2 -4.75 < 0.0001 51 2.9 0.0037Pb 9.31 0.0095 52 -2.86 0.0042 73 -2.07 0.0382 97 -1.17 0.243Th 28.3 < 0.0001 46 -3.09 0.002 16 -4.22 < 0.0001 16 4.22 < 0.0001U 34.4 < 0.0001 51.5 -2.88 0.0039 1 -4.79 < 0.0001 2 4.75 < 0.0001

Table S2-C. Results of non-parametric statistical tests of the difference between peat, lichen and ash addition in both lakes, at the end of the experiment.

component

Kruskal-Wallis(H-test)

peat-ash-lichenMann-Whitney (U-test)

H p-levelpeat-lichen peat-ash ash-lichen

U Z p-level U Z p-level U Z p-levelS.C. 18.2 0.0001 63.5 0.491 0.624 13.5 -3.38 0.0007 4.5 3.9 0.0001pH 23.7 < 0.0001 58.5 -0.779 0.436 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001

7

575859

DOC 5.52 0.0481 49 -1.05 0.295 36 1.58 0.114 24 -2.18 0.029DIC 16.9 0.0002 34 -1.71 0.086 5 -3.63 0.0003 9 3.1 0.0019

SUVA 20.2 < 0.0001 < 0.0001 3.76 0.0002 < 0.0001 3.46 0.0005 16 2.31 0.0208Li 24 < 0.0001 52 1.15 0.248 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001B 2.36 0.307 68 0.231 0.817 57 -0.866 0.386 43 1.67 0.0941

Na 5.81 0.049 62 0.577 0.564 36 -2.08 0.0377 37 2.02 0.0433Mg 28.9 < 0.0001 11 -3.52 0.0004 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Al 27.4 < 0.0001 20 3 0.0027 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Si 21.1 < 0.0001 68 0.231 0.817 < 0.0001 -4.16 < 0.0001 7 3.75 0.0002P 23.4 < 0.0001 66 -0.346 0.729 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001K 25.8 < 0.0001 32 -2.31 0.0209 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001

Ca 23.7 < 0.0001 24 -2.77 0.0056 8 -3.7 0.0002 < 0.0001 4.16 < 0.0001Ti 23.4 < 0.0001 67 -0.289 0.773 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001V 24.2 < 0.0001 48 1.39 0.166 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Cr 0.137 0.934 64 -0.462 0.644 70 -0.115 0.908 71 -0.058 0.954

Mn 26.8 < 0.0001 < 0.0001 -4.16 < 0.0001 0 -4.16 < 0.0001 24 2.77 0.0056Fe 15.1 0.0005 19 3.06 0.0022 46 -1.5 0.133 14 3.35 0.0008Co 0.704 0.703 66 0.346 0.729 63 -0.52 0.603 58 0.808 0.419Ni 6.7 0.0352 35 -2.14 0.0327 32 -2.31 0.0209 67 -0.289 0.773Cu 3.49 0.175 48 -1.39 0.166 41 -1.79 0.0735 68 0.231 0.817Zn 0.456 0.796 70 -0.115 0.908 62 0.577 0.564 62 -0.577 0.564Ga 23.2 < 0.0001 34 -2.19 0.0282 < 0.0001 -4.16 < 0.0001 9 3.64 0.0003Ge 17.5 0.0002 34 -0.533 0.594 < 0.0001 -3.46 0.0005 < 0.0001 3.67 0.0002As 25.5 < 0.0001 34 2.19 0.0282 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Rb 25.9 < 0.0001 31 -2.37 0.0179 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Sr 24.2 < 0.0001 42 1.73 0.083 2 -4.04 0.0001 < 0.0001 4.16 < 0.0001Y 10.4 0.0056 64 -0.462 0.644 21 -2.94 0.0032 28 2.54 0.0111Zr 6.17 0.0458 31 2.37 0.0179 47 1.44 0.149 51 1.21 0.225Nb 9.59 0.0083 52 1.15 0.248 32 -2.31 0.0209 24 2.77 0.0056Mo 24.4 < 0.0001 45 1.56 0.119 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Cd 9.4 0.009 27 -2.6 0.0094 41 -1.79 0.0735 35 -2.14 0.0327Sb 28.6 < 0.0001 13 -3.41 0.0007 0 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Cs 7.77 0.0206 28 -2.54 0.0111 33 -2.25 0.0243 67 0.289 0.773Ba 0.799 0.671 68 -0.231 0.817 60 0.693 0.488 58 -0.808 0.419La 3.79 0.0499 54 -1.04 0.299 69 0.173 0.862 34 -2.19 0.0282Ce 2.72 0.257 56 -0.924 0.356 71 0.058 0.954 40 -1.85 0.0647Pr 17.8 0.0001 44 -1.62 0.106 13 -3.41 0.0007 9 3.64 0.0003Nd 20.8 < 0.0001 53 -1.1 0.273 4 -3.93 0.0001 6 3.81 0.0001Sm 20.7 < 0.0001 41 -1.79 0.073 7 -3.75 0.0002 6 3.81 0.0001Tb 10.8 0.0044 57 -0.866 0.386 26 -2.66 0.0079 21 2.94 0.0032Gd 8 0.0183 41 -1.79 0.0735 24 -2.77 0.0056 55 0.981 0.326Dy 9.66 0.008 52 -1.15 0.248 21 -2.94 0.0032 36 2.08 0.0377Ho 11.8 0.0027 52 -1.15 0.248 15 -3.29 0.001 32 2.31 0.0209Er 7.34 0.0254 56 -0.924 0.356 23 -2.83 0.0047 47 1.44 0.149Tm 10.8 0.0045 68 -0.231 0.817 16 -3.23 0.0012 31 2.37 0.0179Yb 13.4 0.0012 71 0.058 0.954 16 -3.23 0.0012 19 3.06 0.0022Lu 7.76 0.0206 67 -0.289 0.773 34 -2.19 0.0282 27 2.6 0.0094Hf 2.93 0.231 72 < 0.0001 1 47 1.44 0.149 46 -1.5 0.133Ta 2.63 0.269 35 -0.444 0.657 25 -1.63 0.102 26 0.962 0.336W 29.7 < 0.0001 7 -3.75 0.0002 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001Tl 6.81 0.0332 38 -1.96 0.0496 43 -1.67 0.094 35 -2.14 0.0327Pb 9.96 0.0069 32 -2.31 0.0209 67 -0.289 0.773 18 -3.12 0.0018Th 26.7 < 0.0001 25 -2.71 0.0067 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001U 26.4 < 0.0001 27 -2.6 0.0094 < 0.0001 -4.16 < 0.0001 < 0.0001 4.16 < 0.0001

Table S2-D. Results of non-parametric statistical tests of the difference between initial and final stage of experiment in mesocosm with peat, lichen and ash addition in both lakes.

componentMann-Whitney (U-test)

peat ash lichenU Z p-level U Z p-level U Z p-level

S.C. 62.5 -1.56 0.12 72.5 1.09 0.275 77.5 0.859 0.39pH 86 0.464 0.642 12 3.9 0.0001 78 -0.836 0.403

DOC 55 -1.90 0.057 48 -2.23 0.0259 35 -2.62 0.0089DIC 54 1.95 0.0512 < 0.0001 4.46 < 0.0001 70 -0.277 0.782

SUVA 37 -1.98 0.0475 7 -3.53 0.0004 26 2.79 0.0052

8

6061626364

Li 53 2 0.0459 < 0.0001 4.46 < 0.0001 52 2.04 0.0411B 50 -2.14 0.0327 95 -0.046 0.963 52 -2.04 0.0411

Na 55 1.9 0.057 33 2.92 0.0034 81 0.696 0.486Mg 35 2.83 0.0046 < 0.0001 4.46 < 0.0001 92 0.186 0.853Al 60 1.67 0.0947 < 0.0001 4.46 < 0.0001 51 2.09 0.0367Si 64 1.49 0.137 23 3.39 0.0007 68 1.3 0.194P 74 1.02 0.307 < 0.0001 4.46 < 0.0001 96 < 0.001 1K 65 1.44 0.15 < 0.0001 4.46 < 0.0001 57 -1.81 0.0702

Ca 40 2.6 0.0093 12 3.9 0.0001 78 0.836 0.403Ti 33 2.92 0.0034 < 0.0001 4.46 < 0.0001 72 1.11 0.265V 89 -0.325 0.745 < 0.0001 4.46 < 0.0001 91 0.232 0.816Cr 55 1.9 0.057 56 1.86 0.0633 63 1.53 0.126

Mn 32 2.97 0.003 < 0.0001 4.46 < 0.0001 75 0.975 0.33Fe 38 2.69 0.0071 25 3.3 0.001 9 4.04 0.0001Co 46 2.32 0.0203 15 3.76 0.0002 47 2.27 0.0229Ni 52 2.04 0.0411 24 3.34 0.0008 74 1.02 0.307Cu 67 1.35 0.178 39 2.65 0.0081 71 1.16 0.246Zn 79 0.789 0.43 53 2 0.0459 90 -0.279 0.781Ga 49.5 2.16 0.0309 < 0.0001 4.46 < 0.0001 73 -1.07 0.286Ge 52 -0.516 0.606 < 0.0001 3.92 0.0001 78 0.105 0.916As 69 -1.25 0.21 < 0.0001 4.46 < 0.0001 87 0.418 0.676Rb 87 0.418 0.676 < 0.0001 4.46 < 0.0001 38 -2.69 0.0071Sr 73 1.07 0.286 3 4.32 < 0.0001 77 0.882 0.378Y 79.5 0.77 0.444 4 4.27 < 0.0001 74 1.02 0.307Zr 25 -3 0.001 48 -2.23 0.0259 71 -1.16 0.246Nb 44.5 -2.39 0.0168 57 1.81 0.0702 85 -0.511 0.61Mo 82 -0.65 0.516 < 0.0001 4.46 < 0.0001 83 0.604 0.546Cd 47 2.27 0.0229 25 3.3 0.001 94 0.093 0.926Sb 45 2.37 0.0179 < 0.0001 4.46 < 0.0001 90 0.279 0.781Cs 63 -1.53 0.126 48 2.23 0.0259 17 -3.67 0.0002Te 19 -0.943 0.346 < 0.0001 3.1 0.0019 19 -1.59 0.111Ba 95 0.046 0.963 80.5 0.72 0.472 93 0.139 0.889La 56 1.86 0.0633 50 2.14 0.0327 78 0.836 0.403Ce 48 2.23 0.0259 42 2.51 0.0122 77 0.882 0.378Pr 60 1.67 0.0947 17 3.67 0.0002 80 0.743 0.458Nd 62 1.58 0.114 1 4.41 < 0.0001 61 1.62 0.104Sm 69 1.25 0.21 < 0.0001 4.46 < 0.0001 92 0.186 0.853Tb 70 1.21 0.227 7 4.13 < 0.0001 65.5 1.42 0.157Gd 50 2.14 0.0327 16 3.71 0.0002 82 0.65 0.516Dy 88 0.371 0.71 4 4.27 < 0.0001 74 1.02 0.307Ho 80 0.743 0.458 2 4.36 < 0.0001 80 0.743 0.458Er 83 0.604 0.546 12 3.9 0.0001 86 0.464 0.642

Tm 76 0.928 0.353 3 4.32 < 0.0001 61 1.62 0.104Yb 87 0.418 0.676 3 4.32 < 0.0001 78 0.836 0.403Lu 88 -0.371 0.71 13 3.85 0.0001 80 -0.743 0.458Hf 78 -0.836 0.403 89 -0.325 0.745 68 -1.3 0.194W 41 2.55 0.0107 < 0.0001 4.46 < 0.0001 79 0.789 0.43Tl 86 -0.464 0.642 31 3.02 0.0025 37 -2.74 0.0062Pb 82 0.65 0.516 55 1.9 0.057 94 -0.093 0.926Th 71 -1.16 0.246 12 3.9 0.0001 70 -1.21 0.227U 23 3.39 0.0007 < 0.0001 4.46 < 0.0001 63 1.53 0.126

Table S3. Correlation coefficient between elements in mesocosm experiments for peat, lichen and ash (N = 27, 23 and 27, respectively). Marked (bold) positive correlations are significant at p < 0.05.

 Peat

S.C. DOC Fe

Li -0.430 -0.540 0.064Na -0.097 -0.172 0.436Mg 0.354 0.371 0.815Al -0.153 -0.176 0.635P 0.080 0.044 0.575Ca 0.246 0.108 0.408

9

6566

676869

Ti 0.230 0.250 0.884V -0.128 -0.238 -0.385Cr -0.015 -0.072 0.521Mn 0.263 0.309 0.903Co 0.092 0.071 0.715Ni -0.084 -0.141 0.515Ga -0.184 -0.144 0.410As 0.691 0.740 0.470Sr 0.563 0.528 0.795Y -0.579 -0.663 -0.037Zr -0.145 -0.234 -0.490Nb 0.684 0.785 0.231Sb -0.026 -0.125 0.509Nd -0.140 -0.183 0.441Dy -0.632 -0.683 -0.076Yb -0.582 -0.642 0.024U -0.190 -0.234 0.603

 Lichen SC DOC FeMg 0.717 0.680 0.015Si 0.314 0.447 0.052K -0.354 0.565 -0.176Ca 0.430 0.004 0.217Cr -0.097 -0.208 0.986Mn 0.384 -0.173 0.439Co 0.232 -0.064 0.589Ni 0.172 -0.050 0.439As 0.170 0.722 0.103Rb -0.448 0.616 -0.188Sr 0.465 0.127 0.193Y -0.219 -0.604 0.117Zr -0.634 -0.649 0.140Nb 0.120 0.536 0.023Mo -0.124 -0.224 0.977Sb -0.033 -0.545 0.119Yb -0.175 -0.626 0.184Tl -0.064 0.711 -0.002Th -0.538 0.282 -0.029

Table S1, continued.

Ash S.C. DOC FeLi 0.718 -0.109 -0.365B 0.399 0.423 0.184Mg 0.496 0.421 0.167Al -0.136 0.679 0.764Si 0.374 0.504 0.325P 0.575 0.213 -0.106K 0.499 0.255 -0.023Ca 0.515 0.442 0.287

10

70

71

72

Ti 0.298 0.722 0.515V 0.568 -0.109 -0.370Cr -0.464 -0.085 0.392Mn 0.132 0.715 0.511Co -0.586 0.376 0.788Zn -0.425 -0.025 0.464As 0.401 0.655 0.342Rb 0.528 0.228 -0.114Y -0.462 0.078 0.546Zr -0.055 0.449 0.476Nb 0.259 0.823 0.545Mo 0.462 0.276 0.009Sb 0.688 0.210 -0.061Ba -0.361 0.108 0.512La -0.334 0.092 0.476Ce -0.392 0.050 0.464Pr -0.393 0.442 0.790Nd -0.403 0.534 0.846Sm -0.418 0.362 0.686Eu -0.489 0.150 0.614Tb -0.491 0.154 0.624Gd -0.447 0.029 0.496Dy -0.359 0.105 0.480Ho -0.488 0.190 0.582Tm -0.586 -0.345 0.139Pb -0.386 -0.003 0.480Th 0.232 0.760 0.495U 0.220 0.458 0.444

11

73

74

75

76

77