Supplementary Figures and Tables:

Observed Chao1 ACE Shannon InvSimpson Fisher 1200 1200

1000 40

4 900 900 750 30

100

600 600 500 3 20 Alpha Diversity Measure

300 50 250 300 10

2

0 0 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40

Distance from edge (m) Supplementary Figure. 1 Boxplots of fungal community richness (Observed) and alpha diversity calculated using Chao1, ACE, Shannon, Simpson inverse (1/D), and Fisher indexes across all soil fractions in response to distance from the forest edge (where negative distance values represent the interior of the undisturbed forest and positive distance values represent the reclaimed area). Each point represents one sample. The Chao1 and ACE estimates

also depict standard errors as defined by Chiu et al. (2014) and O’Hara (2005), respectively. The Shannon index was defined as H = -sum pi ln( pi ), where pi

is the proportional abundance of species i. The Simpson index was based on D = sum pi2.

Supplementary Figure. 2 Dissimilarity analyses of the relative abundances of fungal taxa with variance greater than 0.000,01 across samples (197 taxa across all soil fractions, 112 taxa from coarse soil samples, 102 taxa from fine soil samples, 171 taxa from forest floor samples, and 136 taxa from root samples) at various distances from the forest edge across three transects (A, B, and C). Heatmaps of Bray-Curtis community dissimilarity using non- metric multi-dimensional scaling ordination-based ordering of samples on the x-axis (where samples are labeled by transect, distance from edge, and soil fraction) and displaying a log4 color scale were created for samples from coarse soils, fine soils, the forest floor, roots, or all samples combined. Sample order was automatically generated from the radial coordinate angles of ordination axes 1 and 2.

Supplementary Figure. 3 Dissimilarity analyses of the relative abundances of fungal trophic functions in soil samples at various distances from the forest edge across three transects (A, B, and C). Heatmaps of Bray-Curtis community dissimilarity using non-metric multi-dimensional scaling ordination- based ordering of samples on the x-axis (where samples are labeled by transect, distance from edge, and soil fraction) and displaying a log4 color scale were created for samples from coarse soils, fine soils, the forest floor, roots or all samples combined. Sample order was automatically generated from the radial coordinate angles of ordination axes 1 and 2. AM, arbuscular mycorrhiza; AP, animal parasite; APG, animal pathogen; AS, animal endosymbiont; EM, ectomycorrhiza; EP, endophyte; ER, ericoid fungus; L, lichenized fungus; LC, lichenicolous fungus; MP, mycoparasite; PP, plant pathogen; SBR, saprotrophic brown rot; SFY, saprotrophic facultative yeast; ST, saprotroph; SWR, saprotrophic white rot; SY, saprotrophic yeast; UK, unknown.

0 .2 0 5 .1 0 -08 -4e - 0 0 0 .1 0 .3 . .1 0 1 -8e 5 .2 -08 - 0 0 0 -0.2 . .1 1 0 . .1 -0 5 0.2 0 -6e-08 -0 .1 0 Northing 5 4 -0. 2 . e-0 -0 8 0 -0.15 -0 .3 .3 0 - PCNM 1 PCNM 2 PCNM 3 PCNM 4 6058175 6058215 6058255

-1 0 e 0.2 - 08 1 1 0. .5 - e - 0 - 3e-0 08 5 0 8 - . 0 9 0 8 0 8 e 0 -0 -0 1 2 - e 5e . 1 0 - 9 -1.5e-08 -0 0 1 -2e-08 e Northing e -1e-08 - 5 0 -3e-08 8 0 PCNM 5 PCNM 6 PCNM 7 PCNM 8

6058175538800 6058215 6058255 538840 538880 538800 538840 538880 538800 538840 538880 538800 538840 538880

Easting Supplementary Figure. 4 Principal coordinates of neighborhood matrices (PCNMs) of the spatial coordinates where soil samples were collected. The point size in each plot is proportional to the PCNM value. Data for PCNM 9 are not shown.

- −1 + −1 −1 NO3 (μg g ) NH4 (μg g ) Total N (%) P (μg g ) Forest floor Forest 0.5 1.0 1.5 5101520 10 15 20 25 30 35 40 0 20 40 60 80 100 120 140

-10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 Mineral soil Mineral 5678910 4 6 8 10121416 0.05 0.10 0.15 0.20 10 20 30 40 50 60

-10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40 -10 -5 0 5 10 20 40

Distance from edge (m)

Supplementary Figure. 5 Boxplot of nitrate (NO3–), ammonium (NH4+), total nitrogen (N), and phosphorus (P) concentrations in forest floor and fine soil fractions in relation to distance from the forest edge (where negative distance values represent the interior of the undisturbed forest and positive distance values represent the reclaimed area).

Supplementary Table 1: Fungal taxa detected using pyrosequencing of DNA from aspen roots and Illumina sequencing of soil DNA collected along transects crossing from the interior of the undisturbed forest into the reclaimed area, ordered by total read number (RN) across all soil fractions. Taxa for which relative abundance (Rel. abun.) or presence or absence (Pres. / abs.) was significantly associated with the reclaimed area or the forest interior when the response of these 92 taxa was modeled across all soil fractions are identified. Taxa deemed highly variable (variance greater than 0.000,01 across all soil fractions) are also identified. The associated trophic function (TF) is listed for each taxon. Pres. / Highly RN Fungal taxon TF* Rel. abun. abs. variable 122,627 Cortinarius glandicolor EM Interior yes 46,697 Thelephora terrestris EM Interior yes 31,559 Mycena sp. GK-2010 ST Interior yes 30,916 Sebacina epigaea EM Interior yes 29,191 Piloderma sphaerosporum EM Interior Interior yes 28,740 Cryptococcus terricola SY Reclaimed yes 25,529 Acremonium sp. HUA1 ST Reclaimed yes 24,189 Piloderma olivaceum EM Interior yes 19,749 Phialocephala fortinii ST yes 19,517 Venturia hystrioides PP Reclaimed yes 14,507 Leucosporidium sp. 1 RB-2011 SY yes 14,327 Xenopolyscytalum pinea ST Reclaimed yes 12,486 Cladophialophora chaetospira SFY yes 10,745 Epicoccum nigrum PP yes 10,103 Mycena alnetorum ST Interior yes 9084 Hypochnicium geogenium SWR yes 7794 Phialophora sp. C16 SFY yes 7759 Alternaria alternata PP Reclaimed yes 6837 Syzygospora effibulata MP Interior 6491 Paraphoma sp. L13 UK Reclaimed Reclaimed yes 5683 Mortierella alpina ST yes 5188 Mycena metata ST Interior yes 4452 Mortierella sp. 12NJ01 ST Reclaimed yes 4053 Cadophora sp. 9232S2 ST Reclaimed Reclaimed yes 2421 Basidioascus undulatus SY Reclaimed 2275 Geomyces sp. DU19 ST 1592 Trichosporon porosum SP Interior Interior 1563 Lewia infectoria PP Reclaimed 1538 Oidiodendron rhodogenum ER Interior 1475 Trichocladium opacum ST Reclaimed 1464 Cryptococcus gastricus SY Reclaimed 1314 Lecanicillium fungicola var. flavidum AP Interior Interior 1001 Truncatella angustata PP Reclaimed Reclaimed 807 Cryptococcus wieringae SY 776 Scleroconidioma sphagnicola PP Interior 704 Devriesia pseudoamericana PP 668 Pochonia bulbillosa AP Interior 547 Cryptococcus stepposus SY Reclaimed Reclaimed 485 Cenococcum geophilum EM Interior yes 471 Meliniomyces variabilis ER Interior 416 Phoma sp. Rr38 PP Reclaimed 370 Tricholoma equestre EM Interior Interior 353 Tuber pacificum EM Interior 336 Rhodotorula laryngis ST 304 Hypocrea pachybasioides MP 298 Thysanophora penicillioides ST 266 Cryptococcus sp. BEN2013a SY 262 Umbelopsis isabellina ST Interior Interior 254 Russula xerampelina EM Interior Interior 196 Ganoderma applanatum PP Reclaimed 193 Taphrina carnea PP Reclaimed 190 Ceratobasidium sp. 257 SBR Reclaimed 169 Mycena stylobates ST 141 Malassezia restricta ST 125 Beauveria bassiana AP 125 Cryptococcus sp. D22 SY Reclaimed 123 Mucor hiemalis ST Reclaimed Reclaimed 84 Taphrina carpini PP 81 Ambomucor seriatoinflatus UK 71 Cryptococcus oeirensis SY Reclaimed 67 Phoma medicaginis PP 65 Bullera alba SY 58 Schizophyllum commune ST Reclaimed Reclaimed 57 Aureobasidium pullulans SFY 57 Cystofilobasidium capitatum SFY 51 Knufia cryptophialidica UK 48 Sporobolomyces sp. AsA5.1 MP 48 Umbelopsis sp. II GK-2010 ST Interior Interior 43 Pilidium sp. BRO-2013 PP Reclaimed 39 Lophiostoma corticola ST Interior 31 Paraphoma chrysanthemicola UK Reclaimed Reclaimed 30 Phaeosphaeriopsis sp. TMS-2011 ST Interior 30 Sporobolomyces gracilis MP 29 Verticillium sp. EXP0564F PP Interior Interior 26 Hebeloma leucosarx EM Interior Interior 24 Phialocephala lagerbergii ST 23 Penicillium brevicompactum ST 21 Geomyces sp. APA-2013 ST Reclaimed 19 Dendrothyrium longisporum UK 17 Umbelopsis ramanniana ST Interior Interior 16 Neurospora crassa ST Reclaimed 14 Fusarium solani PP Interior Interior 14 Sporormiella vexans ST 13 Exobasidium miyabei PP Interior 13 Plectosphaerella cucumerina PP 7 Taphrina johansonii PP 5 Cryptococcus magnus SY 5 Mrakiella aquatica ST 5 Taphrina pruni PP Interior Interior 4 Cortinarius parvannulatus EM Interior 3 Mycoarthris corallina ST Reclaimed 1 Tomentella lilacinogrisea EM Note: *AP, animal parasite; EM, ectomycorrhiza; ER, ericoid; MP, mycoparasite; PP, plant pathogen; SBR, saprotrophic brown rot; SFY, saprotrophic facultative yeast; ST, saprotroph; SWR, saprotrophic white rot; SY, saprotrophioc yeast; UK, unknown

Supplementary Table 2: Fungal taxa detected in only one of the four soil fractions. Taxa are ordered by total read number (RN) across all soil fractions.

RN Coarse soil RN Fine soil RN Forest floor RN Root Cryptococcus 52 Gyromitra gigas 39 1002 Marchandiobasidium aurantiacum 237 Phialocephala sp. N48 agrionensis Paraphaeosphaeria 19 23 Cortinarius orasericeus 834 Exidiopsis effuse 122 Mycena abramsii sp. Hygrocybe sp. GDGM 10 Thelonectria sinensis 10 561 Magnaporthaceae sp. CPC 26245 40 Lactarius pseudohatsudake 40050 Clathrosphaerina Sporobolomyces vouchered mycorrhizae 9 8 467 29 Phaeosphaeria sp. B3B zalewskii symmetricus (Humaria) Fusicolla 7 8 Leptosphaeria doliolum 334 Heyderia abietis 27 Gymnopus barbipes aquaeductuum Aspergillus Paraphaeosphaeria 7 8 216 Neournula pouchetii 27 Massarina albocarnis fumigatus neglecta Bacidia sp. WSL Lactarius sp. 2 KW- 6 7 216 Aquapeziza globispora 14 Clavaria atrofusca DF72 2015 Auricularia 5 7 Squamanita paradoxa 159 Hirsutella sp. B YA-2015 12 Tuber cf. fulgens TG-2008 fuscosuccinea Psilocybe cf. 5 Xylaria berteri 7 subviscida/crobula X- 158 Hysterangium nephriticum 12 Rhizophagus irregularis DAOM 181602 45 Tomentella cf. Tuber sp. EC261 5 6 120 Junghuhnia fimbriatella 10 Hohenbuehelia auriscalpium botryoides B293 zygomycete sp. Artz 4 Mucor sp. JJP-2009a 6 99 Ramularia major 10 Trichopeziza sulphurea 73 Orbilia sp. HOB- Cryptococcus sp. 4 6 95 Neobarya sp. GJS 06-171 10 Phaeocryptopus gaeumannii 2016ad MD76-1BY leaf litter ascomycete 4 Volvariella dunensis 6 82 Keissleriella yonaguniensis 9 Cantharellales sp. DR Cloro-01 strain its012 Togninia sp. CMW 3 5 Amanita xerocybe 76 Microdochium sp. 6/97-20 9 leaf litter ascomycete strain its395 22119 Pseudotaeniolina 3 5 Umbilicaria haplocarpa 76 Cortinarius luteus 9 Magnaporthe salvinii globosa 3 Auricularia tibetica 5 Tuber sp. ITS-31c 68 Penidiella drakensbergensis 8 Cystotheca wrightii 3 Lyophyllum shimeji 4 Beauveria felina 64 Ombrophila janthina 8 Russula sp. 6 GJ-2013b Minimedusa 3 4 Auriscalpium vulgare 62 Alfaria terrestris 7 Clavaria flavostellifera polyspora Hyaloscypha Libertella sp. 2 4 albohyalina var. 57 Agaricus sp. MM-2013d 7 Penicillium sp. ATT170 EXP0557F spiralis Lasiosphaeria Zopfiella sp. TMS- 2 4 57 Tomentella sp. 309 VM-2015 7 Oidiodendron maius rugulosa 2011 Rhodotorula 2 4 Cortinarius tessiae 56 Cortinarius caninus 7 Modicella reniformis straminea Coniophora sp. 2 Leucosporidium fellii 4 55 Otidea tuomikoskii 7 cf. Phaeosphaeria sp. CPC 12881 olrim359 2 Lyophyllum aemiliae 4 Ceriporiopsis aneirina 52 Praetumpfia obducens 6 Lactarius deliciosus 2 Phellinus tremulae 4 Lyophyllum maleolens 49 Dactylellina ellipsospora 5 Nectria balsamea 2 Morchella eximia 3 Meruliopsis taxicola 43 Derxomyces sp. ZJJ-855 5 Coccomyces australis Trichaptum fusco- oat root associated 2 3 Candida aurita 42 5 Helvella sp. NHN-2012b violaceum euascomycete 00028 Xylaria Ceratobasidium sp. 2 2 3 40 Calceomyces lacunosus 5 Tomentella sp. 4 RGO-2016 brunneovinosa RJ-2015 Alpova Epulorhiza sp. WC 2 3 36 Typhula variabilis 4 Schizothecium inaequale cinnamomeus 041 Amylocorticiales sp. 1 Collarina aurantiaca 2 35 Coprinopsis echinospora 4 Glomus sp. 0121 2Di102-2 Trichosporon Cryptococcus 1 2 34 Cladonia singhii 4 Clitocybe connata dehoogii armeniacus Saccharata sp. 1 1 2 Glomus sp. 1v1.2-1 33 Diversispora spurca 4 Entoloma sp. 3 AK-2012 ICMP 18939 Amanita sp. EMD 1 2 Inocybe sp. 7 RT-2012 32 Penicillium simplicissimum 4 Paecilomyces sp. IBL 03067 8-2010 Byssonectria 1 2 Rhizina undulata 31 Entoloma hirtum 4 Rhizopus sexualis var. sexualis fusispora Clitocybe sp. 5 PA- 1 2 Sphaeropsis sapinea 29 Lecanicillium fusisporum 4 Nematoctonus leiosporus 2015 Xylaria sp. Vanderwaltozyma sp. 1 2 29 Pseudocercospora nephrolepidicola 4 Grandinia cf. barba-jovis UBC F19756 SGLMf21 GY44S03 1 Antrodiella stipitata 2 Helvella elastica 29 Triparticalcar sp. JEL 555 3 Taphrina confusa Sordariomycetes sp. 1 Phaeoclavulina curta 1 29 Lichenomphalia lobate 3 Geoglossum sp. SA-2015c genotype 131 Russula cf. vinosa Spizellomyces 1 1 28 Hypocrea lutea 3 Mollisina uncinata SMI263 pseudodichotomus Simplicillium sp. 1 1 Clitopilus prunulus 27 Heteroconium triticicola 3 Amanita walpolei FTJZZJ01 Unguiculariopsis 1 1 Cyphellophora sp. 27 Myrothecium inundatum 2 Hebeloma crustuliniforme lettaui Spizellomyces Eupenicillium sp. 1 1 26 Cistella acuum 2 Podospora sp. XSD-39 plurigibbosus ph511 Malassezia 1 Taphrina deformans 1 25 Botryobasidium sp. 1 LR-2015 2 Steccherinum sp. FD-26 pachydermatis Dactylella Paecilomyces 1 1 24 Cladosporium sp. stklk9 2 Russula nitida tenuifusaria marquandii Hydnomerulius 1 1 Preussia octomera 24 Mycena rubromarginata 1 Chlamydocillium cyanophilum pinastri Neurospora 1 1 Rhodotorula philyla 23 Entorrhiza aschersoniana 1 Rhodosporidium sp. APSS 849 calospora Sistotrema sp. 2 LR- Phaeomoniella sp. 1 1 23 Pleospora sp. 286A 1 Arthrinium sp. 5/97-44 2015 Sib2-3-4 Ceratobasidium sp. 3 1 1 Polyporus brumalis 23 Talaromyces dendriticus 1 Coniochaeta sp. XS62m1 RJ-2015 Rhizopogon 1 Phellodon putidus 1 23 Vanderwaltozyma sp. LCF-03 1 Hygrocybe sp. 4 GMB-2014 ellipsosporus Alatosessilispora 1 1 Russula sapinea 23 Cortinarius coalescens 1 Orbilia aprilis bibrachiata Trichophaea sp. PA- 1 Slimacomyces isiola 1 22 Lapidomyces hispanicus 1 Pyrenochaeta sp. 14009 2013 Ramaria stricta var. 1 22 Microbotryum scorzonerae 1 Zopfiella erostrata concolor 1 Bisporella subpallida 22 Sebacina cystidiata 1 Perenniporia subacida Bradymyces sp. LS- 1 21 Hypoderma rubi 1 Coltricia crassa 2015a Tremellaceae sp. 1 21 Botryobasidium sp. 1 Inocybe pseudoasterospora TMS-2011 1 Cordyceps brongniartii 20 Clematidis italic 1 Lactarius subdulcis Cytospora cf. 1 austromontana JZG- 20 Fonsecazyma sp. 1 Epulorhiza sp. SC 034 2008 Ramichloridium 1 20 Orbilia sp. HOB-2016n 1 Thyronectria sinopica ducassei 1 Ceramothyrium ficus 20 Tuber pseudomagnatum 1 Spizellomyces punctatus Entoloma 1 20 Ramaria sp. 14 AK-2012 1 Exophiala sp. LS-2015a crassicystidiatum 1 Gyromitra esculenta 20 Megalospora subtuberculosa 1 Cortinarius suberi Hygrocybe 1 19 Claussenomyces olivaceus 1 Inocybe sp. OTU291 aurantiosplendens Hygrocybe sp. KA12- 1 18 Clavicipitaceae sp. LM336 1 Tuber uncinatum 1399 Myrothecium sp. 41 1 18 Phaeothecoidea melaleuca 1 Agonimia vouauxii KW-2015 Umbelopsis sp. 1 17 Sporobolomyces sasicola Mykopat 134 1 Perenniporia sp. JX101 17 Athelia arachnoidea Cryptococcus sp. AY- 1 17 Oidiodendron setiferum 59 1 Lactarius helvus 16 Bryochiton sp. M198 1 Rhizopogon luteolus 16 Phialophora japonica 1 Suillus pungens 15 Sporormiaceae sp. HA-2015c 1 Sarea sp. K25 15 Allantophomopsis cytisporea Backusella 1 15 Sistotrema sp. I78 tuberculispora 15 Lecythophora sp. RIFA 40C Microbotryomycetidae sp. 14 EXP0507F 14 Colletotrichum gloeosporioides 14 Fusarium solani 14 Teratosphaeria sp. CPC 13680 14 Paramicrothyrium chinensis 13 Sepedonium chalcipori 13 Caliciopsis indica 13 Venturia macularis 13 Tremiscus helvelloides 13 Hormonema carpetanum 13 Acrodontium luzulae 13 Radulidium subulatum 12 Pezizaceae sp. RT00019 12 Amorphotheca resinae 12 Cadophora sp. REF021 12 Orbilia aristata 12 Inocybe sp. YM397 12 Dendroclathra caeruleofusca 11 Chaenothecopsis golubkovae 11 Thielavia microspore 11 Lepiota cortinarius 11 Calcarisporiella thermophila 10 Syzygospora alba 10 Cylindrocarpon sp. YIMPH30018 10 Xylaria sp. ATT025 10 Lentinus tigrinus 10 Steccherinum ochraceum 10 Evernia divaricate 10 Sphaeronaemella fragariae 10 Typhula japonica 9 aff. Verticillium sp. LA89 9 Pseudolachnella pachyderma 9 Chionosphaera apobasidialis 9 Teratosphaeria sp. CPC 14957 9 Penicillium dipodomyicola 9 Peziza sp. HK 87-273 9 Cortinarius sordidemaculatus 8 Malaysiasca phaii 8 Candida mesorugosa 8 Mycena oregonensis 8 Cortinarius boreidionysae 8 Coniosporium sp. MA4666 8 Triadelphia pulvinata 7 Pleosporales sp. KT3284 7 Claviceps purpurea 7 Taphrina johansonii 7 Amanita sp. 3 ZLY-2014 7 Bandoniozyma noutii 7 Inocybe sp. OTU293 7 Lactifluus leucophaeus 7 Usnea hirta Diplolaeviopsis cf. ranula 7 Diederich 16989 7 Radulidium sp. CBS 115704 7 Rhizophydium sphaerotheca 7 Trigonopsis vinaria 6 Microbotryaceae sp. LH26 6 Rhytismataceae sp. 8PBL101 6 Cytospora sp. RJ-2015 6 Microdochium seminicola 6 Nectria lamyi 6 Ramularia gaultheriae 6 Acremonium longisporum 6 Chaetomium sp. SS5 6 Stachybotrys chartarum 6 Hyphoderma setigerum 6 Xanthophyllomyces dendrorhous 6 Sebacina sp. AA3.9 6 Actinostilbe flavolanata 5 Chaetothyriomycetidae sp. foliar endophyte of Picea glauca 5 sp. K2 5 Gelidatrema sp. OM11-1 5 Lecanoromycetes sp. PIMO_379 5 Metacordyceps sp. Ophiocordyceps cf. acicularis 5 NHJ10418.01 Sporobolomyces aff. inositophilus 5 UCDFST 72-354 5 Tremella indecorata 5 Dermea hamamelidis 5 Devriesia sp. LS-2015a 5 Coemansia pectinate 5 Cylindrotrichum gorii 5 Mrakiella aquatic 5 Orbilia sp. HOB-2016w 5 Penicillium tularense 5 Phaeosphaeria sp. 5 Pholiota sp. SCK05-7-ZP19 5 Pyrenochaeta lycopersici 5 Stachybotrys dolichophialis 5 Tricharina praecox var. praecox 5 Phanerochaete sp. ATT215 5 Laccaria sp. FP-98550 5 Lecidea nylanderi 5 Umbilicaria ruebeliana 5 Aquamyces chlorogonii 4 fungal sp. TRN437 4 Hyaloscyphaceae 1 RB-2011 Monoblepharidomycetes sp. 4 ATCC MYA-4807 4 Asteromella pistaciarum 4 Exobasidium vaccinia 4 Ophiostoma africanum 4 Phoma caloplacae 4 Podosphaera fusca 4 Stagonospora sp. AX113 4 Acremonium breve 4 Acremonium hyalinulum 4 Coprinopsis cothurnata 4 Cryptodiscus rhopaloides 4 Gliocephalotrichum ohiense 4 Pleurotheciella uniseptata 4 Ramicandelaber brevisporus 4 Wrightoporia subavellanea 4 Galactomyces candidum 4 Tomentella sp. 4 Boubovia sp. M.H. 80813 4 Dokmaia sp. 1 TMS-2011 Neoascochyta sp. OTU023 AN- 3 2016 3 Ilyonectria macrodidyma 3 Lophodermium conigenum 3 Leptosporomyces galzinii 3 Penicillium sp. XN10 3 Strossmayeria basitricha 3 Cryptococcus mujuensis 3 Cortinarius sp. 12 RT-2012 3 Tomentella sp. 15 SGT-2012 3 Elixia sp. ASU-THNIII-41750 3 Phaeosclera dematioides 2 Microthecium sp. YM-2015g 2 Hypomyces completes 2 Sporobolomyces lactophilus 2 Sporobolomyces xanthus 2 Devriesia fraseriae 2 Fusarium sp. Vega189 Gaeumannomyces graminis var. 2 avenae 2 Microdochium nivale 2 Mycosphaerella cryptica 2 Neofabraea alba 2 Coprinopsis candidolanata 2 Melanoleuca sp. acystis group 2 Peziza sp. SGT-2012 2 Preussia sp. EAL2.5 2 Rhodotorula yarrowii 2 Schizopora sp. DLL2009-145 2 Tricholomopsis flammula 2 Exophiala sp. NH512 2 Exophiala sp. VL279 2 Hyphoderma granuliferum 2 Cryptococcus randhawii 2 Glomus sp. 1 SL-2017 2 Albatrellus higanensis 2 Coltricia perennis 2 Russula densifolia 2 Absconditella sp. Spribille 39168 2 Placynthiella uliginosa 2 Arxiella dolichandrae 2 Dactylaria appendiculata 2 Vermispora sp. AS6.0290 ectomycorrhizal isolate (cf. 1 Rhizoscyphus ericae aggregate) 1 Pycnobasidium sp. CBS 176.95 1 Sordariomycetes sp. 1 Cosmospora viliuscula 1 Rhodosporidium sp. MAC-2011b 1 Tremella parmeliarum 1 Cryptosphaeria subcutanea 1 Cytospora sp. A11 1 Erythricium laetum 1 Exobasidium arescens 1 Gaertneriomyces spectabile 1 Lophodermium molitoris 1 Spizellomyces kniepii 1 Teratosphaeria sp. 1 Tranzscheliella hypodytes 1 Acanthophysium lividocaeruleum 1 Ampelomyces quisqualis 1 Clitocybe metachroa 1 Comoclathris sedi 1 Coniochaeta hoffmannii 1 Crepidotus calolepis 1 Cyphellophora pauciseptata 1 Dactylellina arcuate 1 Exidiopsis plumbescens 1 Handkea excipuliformis Hygrocybe occidentalis var. 1 occidentalis 1 Hymenoscyphus ohakune 1 Mortierella cf. gamsii CBS 314.52 1 Mucor fragilis 1 Mycena alba 1 Penicillium sp. HZ-5 1 Preussia sp. JJP-2009a 1 Ramicandelaber longisporus 1 Rhodotorula sp. CBS 107345 1 Rhodotorula sp. JCM8162 1 Rosellinia abscondita 1 Scolecobasidium dendroides 1 Sympoventuria capensis 1 Dioszegia catarinonii 1 Exophiala sp. EXP0542F 1 Exophiala sp. Ppf18 1 Phanerochaete sp. 853 1 Amphinema sp. 6 UK-2011 1 Cortinarius pholideus 1 Geopora arenicola 1 Hebeloma grandisporum 1 Hydnellum peckii 1 Piloderma lanatum 1 Russula cf. rosacea SY-2008 1 Russula faginea 1 Russula Pascua 1 Sebacina sp. Seb8I 1 Tomentella lilacinogrisea 1 Tomentella sp. 1 ZWG-2011 1 Absconditella lignicola 1 Corticifraga peltigerae Schwanniomyces polymorphus var. 1 polymorphus 1 Sonoraphlyctis ranzonii 1 Vestigium trifidum

Supplementary Table 3: Fungal taxa only detected in mineral soil fractions (i.e., fine and coarse soil). Taxa are ordered by total read number (RN) across all samples.

RN Fungal taxon 1175 ectomycorrhiza of Salix reinii 265 Tarzetta cf. cupularis SOC973 102 Xenasmataceae sp. RB-2011 88 Inocybe giacomi 78 Hygrocybe laeta 62 Leucopholiota decorosa 58 Tulostoma sp. 13 EL-2016 52 Gyromitra gigas 46 Ambispora sp.1 SL-2017 45 Agrocybe praecox 41 ericoid mycorrhizal sp. Sm2 37 Phanerochaete conifericola 36 Pseudorobillarda phragmitis 34 Mortierella sp. 38249-8 26 Inocybe cf. giacomi ME12_A12 18 Inocybe napipes 17 Hypomyces tubariicola 17 Conocybe fuscimarginata 17 Boletopsis subsquamosa 16 Descolea tenuipes 15 Rubellisphaeria abscondita 15 Taphrina wiesneri 15 Cyanodermella oleoligni 15 Pyronema sp. MAB-2010a 15 Pleurotopsis longinqua 14 Lentinellus micheneri 13 Phlyctochytrium africanum 13 Clavaria sphagnicola 13 Glomus sp. N10.2 12 Cephalotheca sulfurea 12 Cryptococcus heimaeyensis 12 Hydnellum concrescens 11 vouchered mycorrhizae (Basidiomycota) 11 Clavaria citrinorubra 11 Claroideoglomus drummondii 10 Thelonectria sinensis 10 Tricholoma viridiolivaceum 9 Sporidiobolales sp. LM535 9 Tayloriella erythrosticta 8 Sporobolomyces symmetricus 8 Microbotryum bistortarum 8 Fomitopsis cajanderi 8 Pacispora scintillans 8 Cladonia perforate salal associated fungal clone 7 UBCtra1522_15 7 Cytospora sp. VL218 7 Nigrospora sp. 7 Psilocybe cf. subviscida/crobula X-45 7 Sabuloglossum arenarium 7 Spathularia sp. G. Wu 115 7 Fusicolla aquaeductuum 7 Squamanita paradoxa 6 cf. Tuber sp. EC261 B293 6 zygomycete sp. Artz 73 6 Clavaria neonigrita 6 Mortierella sp. 6 Rhodotorula bogoriensis 6 Tulostoma niveum 6 Blastobotrys terrestris 6 Cryptococcus sp. MD76-1BY 5 Athelia sp. CFMR 10126 5 Auricularia fuscosuccinea 5 Geomyces sp. 230141-I6 5 Orbilia alba 5 Postia ptychogaster 5 Cortinarius cf. variegatus CFP525 5 Acarospora rosulata 5 Umbilicaria haplocarpa 4 Leotiaceae sp. 19.L27 4 Beauveria feline 4 Cortinarius californicus 4 Cortinarius tillamookensis 4 Russula laricina 3 Amanita citrina f. lavendula 3 Auricularia tibetica 3 Bridgeoporus nobilissimus 3 Mycena amabilissima 3 Ceratobasidium sp. 2 RJ-2015 3 Meruliopsis taxicola 2 Agaricales sp. 2 Lasiosphaeria rugulosa 2 Podosordaria tulasnei 2 Trichaptum fusco-violaceum 2 Vanderwaltozyma sp. GY44S03 2 Cortinarius bivelus 2 Tomentella sp. H192

Supplementary Table 4: Fungal taxa detected only in samples from the forest interior, forest edge or reclaimed area. Taxa are ordered by total read number (RN) across all samples. For the reclaimed area and the forest interior, only the 89 most abundant taxa are listed.

RN Forest interior RN Forest edge RN Reclaimed area 6290 Genabea cerebriformis 76 Cortinarius sp. BB-2010 5843 Tubulicrinis sp. 8 LR-2015 5344 Vertexicola confusa 64 Symbiotaphrina kochii 5167 Plectosphaerella sp. FPGLXJ06 1680 Peniophorella pallida 57 Agaricus sp. MM-2013d 4053 Cadophora sp. 9232S2 1297 Wilcoxina mikolae 24 Mycena rubromarginata 2829 Peziza pseudoviolacea 1175 ectomycorrhiza of Salix reinii 20 Trimorphomyces sp. 2214 Podospora glutinans 1002 Marchandiobasidium aurantiacum 19 Camptophora hylomeconis 2023 Pseudaleuria quinaultiana 905 Lactarius alnicola 19 Paraphaeosphaeria sp. 1186 Caloplaca sp. RVM-2012 797 Hebeloma sp. 1 UK-2011 19 Lyophyllum cf. aemiliae AB04-10-467 1113 Trichoderma aureoviride 713 Cortinarius badiovinaceus 15 Lecythophora sp. RIFA 40C 1094 Peziza sp. DG05-63 522 Helvella sp. QZ-2015d 10 Cystofilobasidium intermedium 1071 Rhizoctonia sp. 70B 520 Xylodon radula 8 Cystotheca wrightii 1009 Dendrosporium sp. 1 RB-2011 337 Athelia sp. 4 LR-2015 8 Candida mesorugosa 1001 Truncatella angustata 334 Heyderia abietis 7 Aspergillus fumigatus 997 Phialophora alba 326 Mycena supina 6 Microdochiella fusarioidea 813 Annulohypoxylon nitens 306 Leptosporomyces septentrionalis 6 Cryptococcus sp. GY43L02 DEG-2011 763 Lasiosphaeris sp. 1 ANM-2011 276 Aspicilia laevata 5 Pholiota sp. SCK05-7-ZP19 744 Ramariopsis crocea f. conspicua 265 Tarzetta cf. cupularis SOC973 5 Cryptococcus sp. 11-1115 709 Hirsutella sp. NHJ11941.02 257 Mycena silvae-nigrae 4 Rhizopus sexualis var. sexualis 613 grass root mycorrhizal sp. PPO-2 228 Capronia villosa 4 Cortinarius lucorum 581 Mortierella zychae 225 Tomentella lateritia 4 Orbilia sp. HOB-2016ad 561 Magnaporthaceae sp. CPC 26245 198 Aspergillus sp. NJP02 3 Minimedusa polyspora 533 Striatibotrys atypica 186 Didymocyrtis cladoniicola 3 Neoascochyta sp. OTU023 AN-2016 433 Scutellinia scutellata 181 Mycena simia 3 Leptosporomyces galzinii 427 Phialophora verrucosa 165 Cladonia digitata 3 Elasticomyces elasticus 421 Podospora sp. 84_110A 158 Hysterangium nephriticum 2 Russula nitida 416 Phoma sp. Rr38 153 leaf litter ascomycete strain its084 2 Libertella sp. EXP0557F 412 Scutellinia nigrohirtula 141 Phialophora sp. GP57 2 Corticium cf. medioroseum UC2023021 387 Scutellinia vitreola 132 Micarea lignaria var. lignaria 2 Leucosporidium fellii 384 Sistotrema brinkmannii 122 Trichoderma nybergianum 1 Tremellaceae sp. TMS-2011 367 Podospora appendiculata 120 Junghuhnia fimbriatella 1 Clitopilus prunulus 357 Tricharina groenlandica 106 Vararia vassilievae 1 Hymenoscyphus ohakune 356 Ramularia heraclei 96 Tubulicrinis cf. sororius UC2023023 1 Agonimia vouauxii 351 fungal endophyte WMS13 92 Galerina triscopa 1 Corticifraga peltigerae 282 Phialophora sp. H30 91 Tomentella sp. K80C37T323 1 Cordyceps brongniartii 267 Myrothecium sp. 2 TMS-2011 91 Candelaria sp. Hur ANT050743 1 Inocybe pseudoasterospora 255 Entrophospora sp. shylm120 89 Hygrophorus odoratus 1 Phellodon putidus 253 Cordyceps sp. CS1 88 Inocybe giacomi 1 Perenniporia sp. JX101 246 Lachnum spartinae 88 Meria laricis 1 Chlamydocillium cyanophilum 237 Phialocephala sp. N48 83 Tephrocybe striaepilea 1 Ceramothyrium ficus 225 Ophiocordyceps sinensis 76 Cortinarius luteus 1 Alatosessilispora bibrachiata 223 Peziza ostracoderma 69 Mortierella umbellata 1 Rhizopogon luteolus 219 Cudoniella clavus 68 Cladonia pyxidata 1 Russula sapinea 218 Xylodon asperus 68 Penidiella drakensbergensis 1 Cytospora cf. austromontana JZG-2008 216 Hydnaceae sp. KUC11065 62 Leucopholiota decorosa 1 Lophodermium molitoris 216 Aquapeziza globispora 59 Polycephalomyces tomentosus 211 Orbilia rectispora 57 Tomentella sp. 309 VM-2015 207 Thelonectria veuillotiana 56 Cortinarius caninus 206 Endogone lactiflua 55 Otidea tuomikoskii 201 Barnettozyma populi 54 Choiromyces venosus 199 Phaeosphaeria typharum 50 Cortinarius malachius 188 Psathyrella tenera 49 Dactylellina ellipsospora 186 Dactylella xinjiangensis 47 Parmeliopsis ambigua 186 Heteroconium sp. 115_114E 45 Campanophyllum proboscideum 184 Phaeoisaria clematidis 43 Derxomyces sp. ZJJ-855 171 Peziza kallioi 41 Piloderma sp. CC 15-31 170 Coprinus sp. aurim1199 40 Lactarius pseudohatsudake 169 Microascaceae sp. LM278 40 Umbilicaria polyphylla 159 Betamyces sp. PL 173 39 Cryptococcus agrionensis 159 Hirsutella sp. B YA-2015 38 Acarospora bullata 157 Fusarium oxysporum 35 Hypotrachyna osseoalba 156 Pestalotiopsis sp. HC02 34 Cortinarius olivaceofuscus 153 Periconia sp. OUCMBI110093 34 Cladonia singhii 151 Geoglossum chamaecyparinum 34 Xenophacidiella pseudocatenata 149 Scutellinia subhirtella 33 Phlebiella christiansenii 147 Atractiellales sp. ca_besc_803bd 33 Cortinarius subfloccopus 147 Lectera colletotrichoides 32 Penicillium simplicissimum 145 Camarophyllus sp. PDD 87889 32 Cladonia gracilis 143 Neomicrosphaeropsis cytisinus 29 Clavulina cf. rugosa H 6002016 139 Cryptococcus aureus 29 Cortinarius armeniacus 138 Cadophora sp. GR_BOTAO1 29 Lichenomphalia lobata 138 Dactylella oxyspora 29 Pseudocercospora nephrolepidicola 138 Drechslera catenaria 27 Myrothecium inundatum 136 Clonostachys pityrodes 26 Megacollybia rodmanii 128 Cercophora sulphurella 26 Inocybe calamistrata 125 Chaunopycnis alba 26 Inocybe hotsoniana 124 Chalara sp. LL-16.3 24 Pochonia sp. LC-2016 123 Fibulomyces aff. fusoideus UC2023051 23 Cortinarius coalescens 123 Mucor hiemalis 23 Cortinarius orasericeus 123 Psathyrella seminuda 22 Cryptodiscus pallidus 115 Hypocrea aeruginea 21 Botryobasidium sp. 113 Mycocalicium sp. Goward 975 21 Hypoderma rubi 113 Hebeloma pamphiliense 20 Tuber pseudomagnatum 112 Hymenoscyphus caudatus 20 Megalospora subtuberculosa 111 Cladonia stellaris subsp. stellaris 20 Lecanosticta acicola 108 Trichoderma virens 20 Ramaria sp. 14 AK-2012 107 Glomus sp. JB-2014 19 Amphinema sp. PDD 95740 104 Acremonium sp. LKF08-037 19 Clavulina sp. TU102197 104 Aleuria rhenana 19 Cortinarius microglobisporus 104 Sarcoscypha javensis 19 Amyloporia sp. MBP-2011b 102 Xenasmataceae sp. RB-2011

Supplementary Table 5: Vegetation present at the site, by distance from the forest edge (where negative distance values represent the interior of the undisturbed forest and positive distance values represent the reclaimed area) and by transect (A, B, or C). Trees are represented by counts within a 3.99- m radius plot (only at the -10 m plot), seedlings are represented by counts within a 1-m radius plot, and ground cover is shown as percent cover in a 1-m radius plot.

Distance from edge –10 m –5 m 0 m 5 m 10 m 20 m 40 m Transect A B C A B C A B C A B C A B C A B C A B C Trees (count) Picea glauca 7 4 Populus tremuloides 7 Picea mariana 5 8 Betula papyrifera 1

Seedlings (count) Picea glauca 1 1 1 1 Populus tremuloides 3 3 7 1 1 3 2 2 19 6 Salix sp. 1 1 2 Populus balsamifera 2 Betula sp. 1

Ground cover (%) Bare / CWM* 10 20 10 20 5 20 50 5 80 20 70 80 40 60 30 15 10 10 60 Grass 1 30 5 80 20 100 20 10 50 25 40 50 60 80 30 Moss 50 70 40 40 90 30 10 Achillea millefolium 1 5 1 10 Cirsium arvense 10 Cornus canadensis 1 20 Epilobium angustifolium 5 1 1 1 1 5 5 5 Equisetum sp. 5 5 5 1 10 80 10 1 1 20 5 Fragaria sp. 1 1 5 Rhododendron 1 50 30 5 groenlandicum Ribes sp. 1 Rosa asicularis 5 1 Rubus idaeus 5 10 1 1 5 5 Salix sp. 5 1 5 1 Sonchus arvensis 5 5 1 Taraxacum officinale 1 1 Trifolium hybridum 10 Vaccinium vitis-idaea 40 40 30 20 Viburnum edule 1

Note: *CWM = coarse woody material.

Supplementary Table 6: Significance (expressed as p values) of potentially confounding factors in constrained ordinations (by constrained correspondence analyses) of the relative abundance (Rel. abun.) or the presence or absence (Pres. / abs.) of fungal taxa in coarse soils, fine soils, the forest floor, roots, or all samples combined. Responses were limited to taxa with variance greater than 0.000,01 among samples, except for rightmost column, for which all taxa were considered. Percent values represent the proportions of inertia explained by the constraints. Non-significant nutrient and principal coordinate of neighborhood matrices (PCNM) variables are designated with ‘ns’.

Response variable Highly variable taxa All taxa Constraints No. of Dom. Seedling Nutrient Tota Transect seedling tree P† PCNMs components PCNMs components species s l N* s species All soil 0.001 0.001 0.094 0.001 0.001§ 0.001 1–9 0.001 1–9 Rel. abun. NA§ NA§ fractions‡ 4.53% 16.44% 1.94% 2.47% 12.47% 22.49% 21.81% Forest 0.373 0.847 0.891 0.359 0.001 0.00 ns ns ns floor 10.82% 33.31% 3.47% 5.47% 7.35% 1 Coarse 0.735 0.925 0.444 0.201 0.001 0.00 0.02 ns ns soils 11.17% 26.35% 4.77% 6.54% 20.43% 2 7 0.549 0.870 0.410 0.097 0.001 0.00 0.03 0.011 0.019 Fine soils 8 8 11.71% 27.61% 5.66% 7.46% 21.21% 1 7 10.22% 9.50% 0.383 0.917 0.691 0.164 0.002 0.00 0.04 Roots ns ns 11.84% 29.49% 4.56% 6.40% 16.32% 1 4 Pres. / All soil 0.001 0.001 0.004 0.001 0.001§ 0.009 1–9 0.001 1–6, 8, 9 NA§ NA§ abs. fractions‡ 8.00% 18.27% 2.68% 5.91% 14.18% 9.59% 18.62% Forest 0.118 0.393 0.378 0.046 0.001 0.00 0.009 0.008 ns 3 3 floor 11.70% 36.64% 5.23% 7.04% 15.12 1 9.59% 7.58% Coarse 0.141 0.544 0.469 0.025 0.001 0.00 0.001 0.020 ns 2, 3, 8 3 soils 14.17% 33.84% 5.45% 10.65% 18.72% 1 32.11% 7.90% 0.241 0.587 0.306 0.030 0.001 0.00 0.016 0.020 Fine soils ns 3 4 12.64% 33.55% 6.26% 9.47% 17.46% 1 10.64% 7.97% 0.062 0.897 0.512 0.010 0.001 0.00 0.001 0.003 Roots ns 2, 3, 8 1, 4 13.85% 29.36% 5.25% 9.63% 12.75% 2 25.77% 15.64%

*N, nitrogen; †P, phosphorus ; ‡Each model was conditioned by soil fraction; §Samples with missing mineral soil or forest floor nutrient concentrations were excluded; hence, marginal permutation tests were not applicable (NA).

Supplementary Table 7: Significance (expressed as p values) of potentially confounding factors in constrained ordinations (by redundancy analyses) of the relative abundance (Rel. abun.) of fungal trophic groups or the number of taxa belonging to each trophic group in coarse soils, fine soils, the forest floor, roots, or all samples combined. Percent values represent the proportions of inertia explained by the constraints. Non-significant nutrient and principal coordinate of neighborhood matrices (PCNM) variables are designated with ‘ns’.

Response variables Constraints Seedlin Dom. No. of Othe All Transect g tree Nutrients Total N* PCNMs seedlings r PCNM species species Rel. All soil 0.005 0.001 0.023 0.094 0.001‡ 0.001 1 – 5, NA‡ NA‡ abun. fractions† 5.10% 25.10% 3.23% 2.07% 16.96% 22.99% 7, 8 Forest 0.578 0.231 0.425 0.296 0.009 0.006 0.016 ns 3, 4 floor 9.82% 41.87% 4.76% 5.98% 18.16% 18.92% Coarse 0.296 0.007 0.406 0.672 0.001 0.001 ns ns soils 12.88% 62.59% 5.34% 4.65% 31.75% 0.547 0.005 0.470 0.600 0.001 0.016 Fine soils 0.001 ns 3 11.05% 58.19% 5.44% 4.92% 25.60% 13.05% 0.137 0.011 0.372 0.649 0.045 0.018 Roots 0.047 ns 1 14.54% 59.76% 5.68% 4.99% 16.33% 13.04% No. of All soil 0.004 0.002 0.240 0.020 0.001‡ 0.001 NA‡ NA‡ 1, 3, 6, 8 taxa fractions† 7.37% 20.75% 1.61% 4.17% 16.96% 19.85% Forest 0.379 0.378 0.555 0.334 0.008 0.008 ns ns floor 11.06% 40.56% 2.82% 5.70% 18.16% Coarse 0.276 0.103 0.667 0.254 0.001 0.042 0.001 ns 6 soils 13.90% 49.39% 3.55% 7.09% 31.75% 14.63% 0.998 0.293 0.782 0.793 0.004 Fine soils ns ns ns 6 3.76% 42.73% 1.87% 2.86% 32.59% 0.001 0.101 0.916 0.096 0.033 0.001 Roots 0.047 ns 1 43.85% 49.10% 1.33% 11.88% 16.33% 41.58%

Note: *N, nitrogen.; †Each model was conditioned by soil fraction; ‡Samples with missing mineral soil or forest floor nutrient concentrations were excluded; hence, marginal permutation tests were not applicable (NA)

Supplementary Table 8: Nutrient concentrations* in the forest floor and fine soil fractions. The label NM designates cases where nutrient concentrations were not measured due to absence of the sample.

Forest floor Fine soils

NO3– Ext. P Ext. P Transect Distance from edge† (m) NH4+ (µg g-1) Total N (%) NO3– (µg g-1) NH4+ (µg g-1) Total N (%) (µg g-1) (µg g-1) (µg g-1) A –10 2.99 21.7 0.65 54.3 3.50 5.87 0.068 13.8 –5 15.7 30.5 1.29 57.9 2.94 4.59 0.056 17.3 0 5.66 38.8 1.61 44.2 2.93 5.97 0.101 21.7 5 NM NM NM NM 5.51 5.75 0.153 41.7 10 16.6 12.3 0.269 51.9 10.7 9.12 0.132 29.6 20 6.06 18.8 0.186 67.3 13.3 7.79 0.146 28.9 40 11.8 9.71 0.187 25.6 16.3 10.6 0.136 21.6 B –10 6.35 24.9 0.995 24.7 6.72 4.74 0.071 42.9 –5 3.61 23.1 1.04 1.90 4.99 5.07 0.057 46.4 0 5.92 35.3 1.24 37.0 3.05 4.39 0.041 59.6 5 4.87 10.5 0.20 83.5 5.60 7.22 0.154 26.3 10 5.33 26.0 0.575 56.4 4.65 6.09 0.166 54.2 20 5.75 10.9 0.37 32.3 7.50 7.12 0.168 30.4 40 12.2 10.9 0.127 43.1 4.26 7.36 0.132 21.6 C –10 7.44 42.4 1.21 26.2 4.57 6.85 0.077 9.1 –5 6.42 40.1 1.33 22.4 NM NM NM NM 0 19.8 37.7 1.34 35.7 NM NM NM NM 5 10.9 32.6 0.877 62.0 NM NM NM NM 10 9.41 13.7 0.34 51.9 2.86 6.40 0.212 39.7 20 14.1 35.3 0.431 138 9.33 7.06 0.168 54.7 40 4.15 12.9 0.349 39.6 5.34 9.00 0.124 25.3

Note: *NO3–, nitrate; NH4+, ammonium; N, nitrogen; ext. P, extractable phosphorus; †Negative distance values represent the interior of the undisturbed forest; positive distance values represent the reclaimed area

Supplementary Table 9: Fungal taxa in coarse soils, fine soils, and roots that were significantly favored or hindered by phosphorus (P) concentration (marginal permutation test for axis, p < 0.05).

Fine soils Coarse soils Roots P-favored taxa P-hindered taxa P-favored taxa P-hindered taxa P-favored taxa P-hindered taxa ectomycorrhizal cortinariaceous ectomycorrhizal cortinariaceous Tulasnellaceae sp. Atheliaceae sp. kz32 isolate ECM 189 ectomycorrhiza V15 isolate ECM 189 ectomycorrhiza V15 CBS 508.93 Lecanoromycetidae ectomycorrhiza of Lecanoromycetidae ectomycorrhiza of Archaeorhizomyces cortinariaceous sp. RB-2011 Salix reinii sp. RB-2011 Salix reinii sp. AM-2014 ectomycorrhiza V15 Chloridium sp. TMS- Basidiodendron Archaeorhizomyces ectomycorrhizal Auricularia delicata Auricularia delicata 2011 caesiocinereum finlayi isolate ECM 189 Basidiodendron Parastagonospora Clavaria flavipes Psathyrella abieticola Clavaria flavipes Cadophora orchidicola caesiocinereum avenae Sistotrema Clavariadelphus Pleosporales sp. Hodophilus smithii Mycena metata Cadophora sp. 9232S2 oblongisporum sachalinensis Li0802SP Mortierella cf. hyalina Sistotrema sp. 3 LR- Infundichalara Sistotrema Basidiodendron Galerina badipes TEA059 2015 microchona oblongisporum caesiocinereum Sistotrema sp. 4 LR- Sistotrema sp. 3 LR- Peziza sp. 2 SE-2015 Lacrymaria glareosa Hodophilus smithii Chalara hyalocuspica 2015 2015 Umbelopsis sp. RJ- Mortierella cf. hyalina Sistotrema sp. 4 LR- Piriformospora indica Hygrocybe persistens Clitocybe phyllophila 2015 TEA059 2015 Cortinarius Trechispora sp. Hygrocybe Dendrosporium sp. 1 Psathyrella lutensis Phialocephala fortinii colymbadinus LISU178537 pseudoconica RB-2011 Subulicystidium Umbelopsis sp. RJ- Mortierella cf. hyalina Inocybe assimilata Piriformospora indica Lasiosphaeris sp. N174 longisporum 2015 TEA059 Subulicystidium Inocybe cf. lanuginosa Subulicystidium Vertexicola confusa Mycena amicta Mortierella sp. JCM perlongisporum OSC 1064099 longisporum Subulicystidium Trogia venenata Inocybe fulvipes Amphinema byssoides Mycena sp. GK-2010 Mycena metata perlongisporum Tubulicrinis sp. 8 LR- Cortinarius Inocybe nitidiuscula Trogia venenata Mycena sp. Rr28 Mycena tenax 2015 colymbadinus Glomus mycorrhizal Tubulicrinis sp. 8 LR- symbiont of Piloderma olivaceum Cortinarius fulvescens Peziza pseudoviolacea Phialocephala sp. N48 2015 Marchantia foliacea Glomus mycorrhizal Glomus sp. 8 ZHNL- Piloderma symbiont of Inocybe assimilata Phialocephala fortinii Sagenomella verticillata 2013s sphaerosporum Marchantia foliacea Pseudotomentella Glomus sp. 8 ZHNL- Inocybe cf. lanuginosa Sistotrema sp. 4 LR- Inocybe geophylla Piriformospora indica mucidula 2013s OSC1064099 2015 Trechispora sp. Laccaria sp. AWW564 Russula emetica Inocybe geophylla Inocybe flocculosa Podospora intestinacea LISU178537 Piloderma sp. 9 RT- Russula fragilis var. Laccaria bicolor Inocybe fulvipes Protodontia piceicola Trichophaeopsis sp. 2012 fragilis Cryomyces sp. LS- Russula katarinae Russula gracilis Laccaria sp. AWW564 Inocybe nitidiuscula Ramariopsis helvola 2013b Piloderma sp. 9 RT- Thelephora terrestris Russula sp. Piloderma olivaceum Sphaerobolus iowensis Thyronectria coryli 2012 Piloderma Spirosphaera Trichophaea hybrida Sebacina epigaea Thelephora terrestris Troposporella fumosa sphaerosporum beverwijkiana Tomentella sp. 4 RT- Pseudotomentella Subulicystidium Wilcoxina rehmii Sebacina sp. Seb13I Amanita pantherina 2012 mucidula longisporum Tomentella fusco- Phlebia sp. DLL2011-1 Trichophaea hybrida Russula emetica Sympodiella acicola Amphinema byssoides cinerea Tomentella sp. Russula fragilis var. Meliniomyces bicolor Leptospora rubella Amphinema sp. ML-1 YM1903 fragilis Hypochnicium Tricholoma myomyces Russula gracilis Paraphoma sp. L13 Cenococcum sp. geogenium Tricholoma Glomus sp. 8 ZHNL- Cortinarius saponaceum var. Phlebia sp. DLL2011-1 Russula sp. 2013s colymbadinus saponaceum Glomus mycorrhizal Sebacina epigaea symbiont of Cortinarius fulvescens Marchantia foliacea Sebacina sp. Seb13I Inocybe geophylla Hebeloma collariatum Tomentella fusco- Laccaria bicolor Hygrophorus odoratus cinerea Tricholoma myomyces Laccaria sp. AWW564 Inocybe fulvipes Tricholoma Rhizopogon rudus Inocybe nitidiuscula platyphyllum Tricholoma Tomentella sp. 4 RT- saponaceum var. Piloderma olivaceum 2012 saponaceum Discosia Piloderma Tomentella subtestacea pseudoartocreas sphaerosporum Lepiota sp. Ironside Trichophaea hybrida Russula emetica s.n. Russula fragilis var. Wilcoxina rehmii fragilis Asterophora sp. Sebacina epigaea aurim714 Alternaria alternata Sebacina sp. Seb13I Thelephora sp. Fusarium sambucinum YM3010 Plectosphaerella sp. Tomentella fusco-

FPGLXJ06 cinerea Hypochnicium Tricholoma equestre geogenium Tricholoma Phlebia sp. 1 platyphyllum Syzygospora effibulata Sclerotinia nivalis Lepiota sp. Ironside

s.n. Phialophora bubakii