Table S1 a List of 99 Plant Species Investigated in This Study, Together with Study Site

Table S1 A list of 99 plant species investigated in this study, together with study site, survey period, radiocesium concentration ([Cs]plant) and transfer factor of radiocesium

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

01EquisetaceaeEquisetum arvense L. f. arvenseR1Jul. 210 ±45(3)1760.026153

R2Apr. 848(1)1000.044113

R2Jul. 300 ±111(3)1610.016175

02DennstaedtiaceaePteridiumaquilinum (L.) Kuhn subsp. japonicumR3Oct. 282 ±75(3)1620.011187

(Nakai) Á. et D.Löve

03WoodsiaceaeAthyriumdeltoidofrons MakinoR3Oct. 3,091 ±285(6) 280.119 53excluding rhizome on ground

04Athyriumyokoscense (Franch. et Sav.) H.ChristR3Oct.18,180 ±2,769(6) 10.703 6excluding rhizome on ground

05Deparia japonica (Thunb.) M.KatoR3Oct. 3,610 ±248(3) 220.140 44

06OnocleaceaeOnocleasensibilis L. var.interrupta Maxim.R1Jul. 1,392 ±679(3) 710.174 34

R2Jul. 5,088(1) 130.264 21

07DryopteridaceaeDryopteristokyoensis (Makino) C.Chr.R3Oct.16,825 ±2,302(3) 20.650 7excluding rhizome on ground

08SaururaceaeHouttuyniacordataThunb.F1Jul. 2,936 ±614(3) 340.329 20

09DioscoreaceaeDioscoreapolystachyaTurcz. R1Jul. 274(1)1640.034130

10IridaceaeIris pseudacorus L.R3Oct. 2,501 ±161(3)370.09766

R2Jul. 38 ±38(3)2090.002210

a The classification follows Smith et al. (2006) and Haston et al. (2009) with minor modification by Yonekura and Murata (2012)

b Order of [Cs]plant is shown from the highest (no. 1) to the lowest (no. 213) among 213 samples

c [Cs]soilvalueswereshown inTable 1

d Order of [Cs]plant/[Cs]soil is shown from the highest (no. 1) to the lowest (no. 213) among 213 samples

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

11CommelinaceaeCommelinacommunis L. var. communisR1Jul. 509 ±265(3)1370.06487

R2Jul. 3,049 ±2,177(3) 310.15838

12Murdanniakeisak(Hassk.) Hand.-Mazz.R3Oct. 9,658 ±781(3) 50.37316quadrat-3 at R3

13JuncaceaeJuncusdecipiens (Buchenau) NakaiR1Apr. 821(1)1020.10363

R1Jul. 511 ±179(3)1360.06486

R1Oct. 133 ±26(3)1960.017174

R1Oct. 65 ±39(3)2050.008197quadrat-1 at R1

R2Jul. 692 ±122(3)1140.036125

R3Oct. 1,709 ±202(3)560.06685quadrat-2 at R3

R3Oct. 1,271 ±219(3)760.049108quadrat-3 at R3

14Juncusprismatocarpus R.Br.subsp. leschenaultiiR1Jul. 496 ±163(3)1410.062 93

(J.Gay ex Laharpe) Kirschner

R2Jul. 2,049(1)440.10661

15JuncustenuisWilld.R2Jul. 2,435 ±1,007(3)390.12647

16CyperaceaeCarexmaximowicziiMiq. var. maximowicziiR2Jul. 499 ±228(3)1400.026154

17Cyperusbrevifolius (Rottb.) Hassk. var. leiolepisR1Oct. 3,329 ±1,203(3)230.416 13

(Franch. et Sav.) T.Koyama

18Scirpusfuirenoides Maxim.R3Oct. 608 ±113(3)1240.024161

19ScirpuswichuraeBoeck.R3Oct. 619 ±45(3)1220.024158quadrat-2 at R3

R3Oct. 950 ±347(6) 930.037123quadrat-3 at R3

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

20PoaceaeAgrostisgigantea RothR1Jul. 640 ±206(6)1180.08071

R2Jul. 1,585 ±922(3) 610.08270

F1Jul. 55e(2)2070.006204emean of 0 (ND) and 110

21AlopecurusaequalisSobol. var. amurensis(Kom.) OhwiR2Jul. 221 ±52(3)1730.011186

F1Jul. 105 ±16(3)2010.012184

22Anthoxanthumodoratum L. subsp. odoratumR1Jul. 436 ±256(3)1470.055104

R2Apr. 1,415f(2)700.07379fmean of 1,188 and 1,641

R2Jul. 3,320(1)240.17235

F1Apr.8,185g(2) 70.917 4gmean of 6,700 and 9,670

F1Jul. 169(1)1860.019170

23Arthraxonhispidus (Thunb.) MakinoR3Oct. 3,013 ±349(3)320.11656quadrat-3 at R3

24Calamagrostisepigeios(L.) RothR3Oct. 950 ±16(3) 920.037122leaves

R3Oct. 822 ±42(3)1010.032135inflorescences

25Dactylisglomerata L.R3Oct. 6,753 ±400(3)100.261 22quadrat-2 at R3

R3Oct. 1,486 ±136(3)650.057 99quadrat-4 at R3

F1Jul. 279 ±33(3)1630.031138

26Digitariaciliaris (Retz.) KoelerR2Oct. 196 ±45(3)1800.010189

27Echinochloa crus-galli (L.) P.Beauv. var. crus-galliR1Oct. 98 ±21(3)2040.012182

R2Oct. 118 ±59(3)1990.006205

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

28PoaceaeElymustsukushiensisHondavar.transiens (Hack.) OsadaR1Jul. 47 ±47(3)2080.006206

R2Jul. 221 ±58(3)1720.011185

29Imperatacylindrica (L.) Raeusch. var. koenigii(Retz.) Pilg.R2Apr. 151(1)1920.008199

R2Jul. 123(1)1980.006202

30Loliummultiflorum Lam.R2Jul. 109(1)2000.006207

31MiscanthussinensisAndersson R1Jul. ND(3)2110.000211

R2Oct. 484 ±52(3)1420.025155

R3Oct. 729 ±202(3)1120.028150

F1Jul. ND(3)2120.000212

32PaspalumthunbergiiKunth ex Steud. R3Oct. 1,641 ±98(3)590.06388

33Phalarisarundinacea L. var. arundinaceaR1Jul. 604 ±243(3)1260.07676

R2Jul. 166 ±42(6)1870.009193

R2Oct. 364 ±45(3)1540.019171

34Phleumpratense L.R1Jul. 257 ±42(3)1660.032134

35Poapratensis L. subsp.pratensisvar. pratensisR1Apr. 7,340h(2) 90.918 3hmean of 3,920 and 10,760

R1Jul. 1,137 ±28(3)810.14242

R2Jul. 204 ±29(3)1770.011188

R2Oct. 575 ±51(3)1280.030143

F1Jul. 253i(2)1680.028148imean of 232 and 273

F1Oct. 183 ±74(6)1830.021168

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

36PoaceaeSchedonorusarundinaceus (Schreb.)Dumort.R1Jul. 101 ±17(3)2020.013181

R2Jul. 256 ±93(3)1670.013180

R2Oct. 142 ±45(3)1930.007200

37Setariafaberi R.A.W.Herrm.R2Oct. 179 ±111(3)1840.009191

38Setariapallidefusca (Schumach.) Stapf et C.E.Hubb.R1Oct. 925 ±114(3) 970.11659

R2Oct. 327 ±69(3)1580.017173

39Setariapumila (Poir.) Roem. et Schult.R3Oct. 1,987 ±96(3)480.07775

40Trisetumbifidum (Thunb.) OhwiR2Jul. 1,318(1)730.06884

41Vulpiamyuros (L.) C.C.Gmel. var.myurosR2Jul. 664j(2)1170.034129jmean of 183 and 1,146

F1Jul. 193 ±112(3)1820.022165

42RanunculaceaeRanunculus silerifolius H.Lév. var. glaber(H.Boissieu) TamuraR1Jul. 1,273 ±110(6)750.15937

R2Jul. 390k(2)1520.020169kmean of 0 (ND) and 780

43CrassulaceaeSedum bulbiferum MakinoR1Jul. 1,656 ±148(3)580.20729

44Sedum sarmentosumBungeR2Jul.11,094 ±543(3) 30.576 10

R2Oct. 4,368 ±1,459(3)170.22726

45FabaceaePuerarialobata (Willd.) Ohwi subsp. lobataR3Oct. 785(1)1060.030142quadrat-4 at R3

R3Oct. 391 ±62(3)1510.015178

46Trifoliumpratense L. R1Jul. 3,658 ±209(3) 210.458 12

R2Jul. 1,930 ±704(3)490.10064

R2Oct. 553 ±126(3)1310.029146

F1Jul. 56 ±29(3)2060.006203

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

47FabaceaeTrifoliumrepens L.R1Apr. 1,877(1)510.23525leaves

R1Jul.10,341 ±2,240(4) 41.294 1leaves

R1Oct. 2,784 ±97(3)350.34819leaves

R2Apr. 2,308(1)410.12052leaves

R2Jul. 2,732 ±110(3)360.142 43leaves

R2Jul. 2,442 ±296(3)380.12746scapes

R2Oct. 1,455 ±120(5)660.07677leaves

F1Jul. 218(1)1740.024157leaves

F1Jul. 213(1)1750.024160scapes

48RosaceaePotentillafreynianaBornm.R1Apr. 1,081(1)870.13545

R2Apr. 1,103(1)850.057100

R2Jul. 1,520 ±126(3)640.07974

49CannabaceaeHumulusscandens (Lour.) Merr. R2Jul. 156 ±16(3)1900.008196

50CelastraceaeCelastrusorbiculatusThunb. var. orbiculatus R2Jul. 1,540 ±324(3)620.08072

51SalicaceaeSalix caprea L. R2Jul. 155 ±9(3)1910.008198

R2Oct. 158 ±32(3)1890.008195

R3Oct. 348 ±9(3)1560.013179quadrat-2 at R3

52Salix integraThunb.R2Jul. NDl(2)2130.000213lboth values ND

53Salix miyabeanaSeemen subsp. miyabeanaR2Jul. 100 ±80(3)2030.005208

R2Oct. 123 ±54(3)1970.006201

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

54HypericaceaeHypericumerectumThunb. var. erectumF1Jul. 135 ±79(3)1940.015176

55Hypericumlaxum (Blume) Koidz.R1Jul. 3,075m(2)300.38515mmean of 2,563 and 3,588

56GeraniaceaeGeranium thunbergiiSiebold ex Lindl. et PaxtonR2Jul. 1,009(1)900.052106

R3Oct. 1,635 ±241(3)600.063 90

57OnagraceaeEpilobiumpyrricholophumFranch. et Sav.R3Oct. 2,187 ±107(3)420.08569

58Oenotherabiennis L.F1Apr. 5,750(1)120.645 8

F1Jul. 135 ±38(3)1950.015177

59BrassicaceaeBarbarea vulgaris R.Br.R2Apr. 1,035(1)890.054105

R2Jul. 592 ±27(3)1270.031140

60CardaminescutataThunb. var. scutataR2Apr. 770n(2)1090.040119nmean of 765 and 775

61Drabanemorosa L.F1Apr. 1,127(1)820.12648

62PolygonaceaePersicariahydropiper (L.) DelarbreR2Oct. 233 ±78(3)1710.012183

63Persicarialapathifolia (L.) Delarbre var. lapathifoliaR1Jul. 1,317 ±281(3)740.16536

64Persicarialongiseta (Bruijn) Kitag.R2Oct. 170 ±60(3)1850.009192

F1Oct. 199 ±27(3)1790.022163

65Persicariamuricata (Meisn.) NemotoR2Jul. 812(1)1030.042114

66Persicariasagittata (L.) H.Gross var. sibirica (Meisn.) MiyabeR3Oct. 1,807 ±557(3) 530.07082

67Persicariathunbergii (Siebold et Zucc.) H.Gross var.thunbergiiR2Jul. 573 ±85(3)1290.030144

R3Oct. 3,200 ±487(3)260.124 50

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

68PolygonaceaeRumexacetosa L.R1Apr. 929o(2) 960.11658losette leaves

omean of 854 and 1,003

R2Apr. 606(1)1250.031137losette leaves

R2Jul. 889 ±242(3) 980.046109losette leaves

R2Oct. 402 ±84(3)1500.021167losette leaves

R3Oct. 3,120 ±105(3)270.121 51losette leaves

69Rumexacetosella L. subsp.pyrenaicus(Pourret ex Lapeyr.)R1Jul. 792 ±52(3)1050.09965fertile shoots

Akeroyd

70Rumexobtusifolius L.R1Apr. 506(1)1380.06389losette leaves

R1Jul. 316 ±102(3)1590.040120fertile shoots

R1Oct. 473 ±40(3)1440.059 96fertile shoots

R2Apr. 552p(2)1320.029147losette leaves

pmean of 535 and 568

R2Jul. 194 ±27(9)1810.010190fertile shoots

R2Oct. 671 ±52(3)1150.035126fertile shoots

F1Jul. 28 ±16(3)2100.003209fertile shoots

71CaryophyllaceaeSagina japonica (Sw.) OhwiR2Jul. 417(1)1480.022164

72Stellariaaquatica (L.) Scop.R2Apr. 629(1)1190.033131

R2Jul. 476(1)1430.025156

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

73CaryophyllaceaeStellaria media (L.) Vill.R1Apr. 3,300(1)250.413 14

R1Jul. 332 ±147(3)1570.041115

F1Jul. 202 ±29(3)1780.023162

74Stellariauliginosa Murray var. undulata (Thunb.) FenzlR2Apr. 521(1)1350.027151

R2Jul. 729 ±223(3)1110.038121

75PhytolaccaceaePhytolaccaamericana L.R2Jul. 405 ±133(3)1490.021166

76ConvoluvulaceaeCalystegiapubescensLindl.R1Jul. 234 ±44(3)1700.029145

77PlantaginaceaePlantagoasiatica L. var. densiusculaPilg.R1Oct. 1,534 ±331(3)630.192 30leaves

R1Oct. 1,427 ±62(3)680.179 33scapes

R2Jul. 629 ±127(3)1200.033132leaves

R2Oct. 612 ±102(6)1230.032136leaves

R2Oct. 363 ±53(4)1550.019172scapes

78Plantago major L.R3Oct. 4,898 ±423(3) 150.189 32leaves

R3Oct. 2,045 ±301(3)450.07973scapes

79Veronica persicaPoir.R1Apr. 1,904(1) 500.238 24

80LamiaceaeLamiumpurpureum L.R1Apr. 1,729(1)550.21627

81Prunella vulgaris L. subsp. asiatica(Nakai) H.HaraR2Jul. 2,007(1)470.104 62

var.lilacinaNakai

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

82MazaceaeMazusmiquelii MakinoR1Jul. 2,981 ±553(3)330.37317

R3Oct. 9,450 ±942(3) 60.36518quadrat-2 at R3

83AsteraceaeArtemisia indicaWilld. var. maximowiczii(Nakai) H.HaraR1Apr.4,740q(2) 160.593 9qmean of 3,860 and 5,620

R1Jul. 1,219 ±254(3)770.152 40

R1Oct. 756 ±39(6)1100.09567quadrat-1 at R1

R2Apr. 1,739(1)540.09068

R2Jul. 1,101 ±55(3)860.057101

R2Oct. 695 ±49(3)1130.036124

R3Oct. 3,086 ±522(3)290.11954quadrat-2 at R3

R3Oct. 4,929 ±115(3) 140.191 31quadrat-3 at R3

R3Oct. 1,039 ±162(3)880.040118quadrat-4 at R3

F1Jul. 234 ±92(3)1690.026152

84Aster microcephalus (Miq.) Franch. et Sav. var. ovatusR3Oct. 1,426 ±110(3)690.055103quadrat-2 at R3

(Franch. et Sav.) Soejima et Mot.Ito

85Bidensfrondosa L.R1Oct. 559 ±144(3)1300.07081

R3Oct. 800 ±102(3)1040.031139quadrat-3 at R3

86Bidenstripartita L. var. tripartitaR1Oct. 505 ±100(3)1390.063 91

87Conyzacanadensis (L.) CronquistR3Oct. 3,758 ±370(3) 200.145 41quadrat-3 at R3

F1Jul. 274 ±165(3)1650.031141

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

88AsteraceaeErigeron annuus (L.) Pers.R1Oct. 2,043 ±540(3)460.256 23

R2Jul. 671 ±189(3)1160.035127

R2Oct. 1,343 ±14(3) 720.07083

F1Jul. 310 ±120(3)1600.035128

89Erigeron philadelphicus L.R1Apr. 8,140(1) 81.018 2

F1Jul. 535 ±61(3)1340.060 94

90Hemisteptalyrata BungeR2Jul. 164(1)1880.009194

91Ixerisstolonifera A.Gray var. stolonifera R2Oct. 1,446 ±260(3)670.07578

92Petasitesjaponicus (Siebold et Zucc.) Maxim. subsp.japonicusR2Jul. 1,121 ±345(3)830.058 97

R2Oct. 992 ±144(3) 910.051107

93Pseudognaphalium affine (D.Don) Anderb.R2Jul. 2,395 ±253(3) 400.12449

94Senecio vulgaris L.R2Apr. 1,202(1)780.062 92

95Solidagoaltissima L. R1Apr. 4,365r(2) 180.54611rmean of 4,330 and 4,400

R1Oct. 929 ±177(3) 950.11657

R1Oct. 455 ±44(6)1460.057102quadrat-1 at R1

R2Apr. 2,138(1) 430.11160

R2Jul. 782 ±45(7)1070.041116

R2Oct. 1,116 ±156(3)840.058 98

R3Oct. 1,821 ±175(3) 520.070 80quadrat-2 at R3

R3Oct. 4,049 ±289(3)190.157 39quadrat-3 at R3

R3Oct. 1,142 ±234(3) 800.044112quadrat-4 at R3

Table S1 Continued

IDFamilyaSpeciesSitePeriod[Cs]plantTransfer factorNotes

mean ± SE (n)Orderb[Cs]plant/[Cs]soilcOrderd

96AsteraceaeSonchusoleraceus L.R2Jul. 460 ±98(3)1450.024159

97Taraxacumofficinale Weber ex F.H.Wigg.R1Apr. 5,920(1)110.741 5

R1Jul. 365 ±114(3)1530.046110

R2Apr. 777(1)1080.040117

R2Jul. 860 ±233(3) 990.045111

R2Oct. 626 ±66(3)1210.032133

98Youngia japonica (L.) DC.R2Jul. 1,153 ±205(3)790.060 95

99ApiaceaeOenanthejavanica (Blume) DC. subsp. javanicaR1Apr. 934(1) 940.11755

R1Jul. 1,662 ±508(3)570.20828

R2Jul. 545 ±169(3)1330.028149