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Pacific Northwest Fungi Project North American Fungi Volume 5, Number 5, Pages 85-96 Published December 22, 2010 Larger fungi of the Canadian Arctic Esteri Ohenoja and Martti Ohenoja Department of Biology /Botanical Museum, P.O.B. 3000, FI-90014 University of Oulu, Finland Ohenoja, E., and M. Ohenoja. 2010. Larger fungi of the Canadian Arctic. North American Fungi 5(5): 85-96. doi: 10.2509/naf2010.005.0056 Corresponding author: Esteri Ohenoja [email protected] Accepted for publication July 8, 2010. http://pnwfungi.org Copyright © 2010 Pacific Northwest Fungi Project. All rights reserved. Abstract: In all 143 fungal taxa collected in the years 1971 and 1974 are presented from different habitats of the Arctic and Subarctic tundra in the Keewatin and Franklin areas of N.W.T., Canada and at Fort Churchill, Manitoba. Of the 143 species reported, 122 species are new in N.W.T. and Fort Churchill. The diversity of mycorrhizal species was highest in drier lichen-moss and moss tundra heaths, and in late snow patches, the most common genera being Cortinarius, Inocybe, Hebeloma, Lactarius, and Russula. The most frequent saprobic fungi were Hygrocybe, Arrhenia, Clitocybe, Galerina some of which are bryophilous and Helvella species. In the forest tundra, numerous species typical of conifer forests were found as mycorrhizal symbionts of Picea and Larix. These collections remain the primary source of information on macrofungi in this region. Key words: Agaricales, Russulales, Aphyllophorales, gasteromycetes, Ascomycota, ecology, Arctic tundra, Forest tundra, Canada N.W.T, Fort Churchill/Manitoba 86 Ohenoja & Ohenoja. Larger fungi of the Canadian Arctic. North American Fungi 5(5):85-96 Introduction: This is a continuation of the flora with S. lanata L. ssp. S. richardssonii presentation of the mycological material the Hook., S. planifolia Pursh, S. niphoclada Rydb. authors collected in Arctic Canada in the years and S. vestita Pursh; these species were also 1971 and 1974. Species of the genera Lactarius found in other localities except at Repulse Bay. (Ohenoja and Ohenoja 1993) and Inocybe are published (Ohenoja, Vauras and Ohenoja 1998). Rankin Inlet (lat. 62º 49' N, long. 92º 05' W) and Also material on Marasmius epidryas (Redhead Baker Lake (lat. 64º 20' N, long. 96º 00' W) are et al. 1982), Bryoglossum (Mitrula) gracile situated in the low Arctic zone within the Arctic (Kankainen 1969), Spathularia (Ohenoja 1989), climatic region and Repulse Bay (lat. 66º 31' N, and Arrhenia auriscalpium (Cripps and Horak long. 86º 15' W) lies in the middle Arctic zone 2006) has been dealt with in the published (Polunin 1951). articles, and a small note was given after the first There are acidic and calcareous soils in all trip to Rankin Inlet (Ohenoja 1972). These mentioned areas, with Dryas integrifolia Vahl remain the few reports on larger fungi from this and Salix reticulata L. There are few differences region, however, there are some unpublished between the vegetation of Rankin Inlet and Baker reports in DAOM (Ottawa). Lake, although the tundra at Baker Lake is more mossy and less rocky than at Rankin Inlet. Betula Materials and Methods: This article is glandulosa Michaux occurs at Rankin Inlet and focused on fungi collected by the authors August Baker Lake, but does not occur at Repulse Bay, 10-17, 1971 and July 30-August 28, 1974 in the and Salix species are low-growing in these areas. Hudson Bay area (N.W.T. and Manitoba). The Arctostaphylos and Cassiope tetragona (L.) D. samples are preserved in the Botanical Museum Don plus Bistorta vivipara (L.) Gray are rather of the University of Oulu (OULU), but much common on all study sites. material has been distributed as duplicates to the herbaria DAOM (Ottawa), C (Copenhagen), H The habitats for the Arctic localities are peat (Helsinki), and TUR (Turku). Dr. D.B. Savile communities, patterned hummock-sedge identified some of the Salix species. The authors communities (tussock tundra), seepage slopes, received help in determination of some fungi as unpatterned Carex and Eriophorum meadows on noted in the species list. The nomenclature of the wet lowland depressions, snow patches, and fungi presented follows Index Fungorum. grassy mounds of ground squirrels. At Rankin Inlet and Baker Lake the sandy areas, e.g. along The collection localities were situated at Fort rivers, provide diverse habitats for fungi, similar Churchill, Manitoba, at Rankin Inlet and Baker to burnt ground patterns. At Repulse Bay Lake (N.W.T., District of Keewatin), and Repulse windswept plains and polygonal soils are typical Bay (N.W.T., District of Franklin). between very rocky terrains. Fort Churchill along the southeastern coast of The collection dates were as follows: Hudson Bay (lat. 58 40' N, long. 93 46' W) is Fort Churchill 24.8.1971, 23-25.8.1974, Baker situated on forest tundra at the extent of Lake 14-21.8.1974, Rankin Inlet 10-23.8.1971, latitudinal tree-line for the Northern climatic 30.7. and 22.8.1974, Repulse Bay 1-5.8.1974. region. This represents a transition zone between subarctic forest and tundra. Picea mariana (Miller) Britton, Sterns & Poggenb., P. glauca Results: Fungi characteristic of various habitats (Moench) Voss, Larix laricina (Du Roi) K. Koch are presented in order of: boletes, gilled and Betula "occidentalis" are low lying plants mushrooms (white then dark spored), non-gilled, that support many fungi. There is also a rich Salix gasteromycetes and ascomycete groups. Ohenoja & Ohenoja. Larger fungi of the Canadian Arctic. North American Fungi 5(5):85-96 87 In the low Arctic area there were significant Cortinarius favrei sandy areas on dunes and along roads and rivers C. cinnamomeoluteus (Fig. 1) with Salix herbacea L., S. arctophila C. polaris Cockerell ex A. Heller, Epilobium latifolium L., C. subtorvus Cassiope tetragona, Empetrum nigrum ssp. Inocybe dulcamara hermaphroditum, and Vaccinium uliginosum L. I. geophylla var. alpinum Bigelow. Typical fungi in sandy I. leiocephala habitats were: Lactarius nanus L. rufus Inocybe impexa Russula laccata Laccaria maritima R. nana Clavaria argillacea R. pubescens Helvella atra Calvatia cretacea H. corium C. turneri Thuemenidium arenarium Helvella albella Fungi on dry tundra heaths of Alectoria- Moist mossy tundra heaths (with Betula Cetraria, Carex-Dryas and Cassiope-Dryas glandulosa, Salix reticulata, etc., Cassiope heaths (with Salix spp., Arctostaphylos)(Fig. 2): tetragona, Dryas integrifolia) (Fig. 4): Clitocybe lateritia Clitocybe candicans Gymnopus fuscopurpureus Gymnopus fuscopurpureus Hebeloma alpinum Laccaria montana Hygrocybe lilacina Mycenitis epidryas Inocybe lacera Coprinopsis martinii Rhodocybe popinalis Cortinarius septentrionalis Lactarius dryadophilus Hebeloma monticola Russula altaica Inocybe geophylla var. lilacina R. delica Lactarius glyciosmus L. lanceolatus Fungi in dryish tundra heaths (with Betula L. torminosus glandulosa, Salix arctica Pall., S. herbacea, S. Russula rivulicola polaris Wahlenb. ssp. pseudopolaris (Flod.) Russula Subsect. Xerampelinae Hultén, S. reticulata L., Cassiope tetragona, Helvella queletii Vaccinium uliginosum var. alpinum, V. vitis- Humaria hemisphaerica idaea L. var. minus Lodd., Arctostaphylos alpina (L.) Spreng., Dryas integrifolia and Bistorta vivipara) (Fig. 3): River shores, seeping patches and snow-beds (with Salix herbacea, S. reticulata, Cassiope Leccinum scabrum tetragona, C. hypnoides (L.) D. Don, Dryas Amanita groenlandica integrifolia) (Fig. 5): Clitocybe diatreta Cystodermella adnatifolia Arrhenia auriscalpium Loreleia postii Arrhenia rustica Omphaliaster asterosporus Laccaria pumila Entoloma sericeum Galerina pseudomycenopsis 88 Ohenoja & Ohenoja. Larger fungi of the Canadian Arctic. North American Fungi 5(5):85-96 Inocybe calamistrata S. viscidus Lactarius pseudouvidus Hygrophorus speciosus L. salicis-herbaceae Tricholoma inamoenum Thelephora caryophyllea T. vaccinum Helvella aestivalis Cortinarius bovinus C. gentilis Fungi on turfy, half-bare habitats of tundra heath C. delibutus and on roadsides (with grasses, sedges) (Fig. 6): C. obtusus Lactarius deterrimus Arrhenia chlorocyanea L. pubescens Lichenomphalia hudsoniana L. cf. resimus Entoloma alpicola L. trivialis Hebeloma mesophaeum Russula paludosa Naucoria tantilla R. cf. violaceoincarnata Psilocybe montana Clavulina coralloides Also the rare saprobic Sarcosphaera coronaria Bovista limosa was found in a mossy conifer stand east of Fort B. tomentosa Churchill. It is a rare ascomycete in Europe as Geopora arenosa well. Other saprophytes were Pluteus cervinus, Helvella lacunosa Fomitopsis pinicola and Xeromphalina Peziza badia cauticinalis. Sarcoleotia globosa These collections remain the primary source of Fungi in wet boggy hummocky Carex- information for this region of the Canadian Eriophorum communities (with e.g. Arctagrostis arctic. Huhtinen (1985) reported Geoglossum latifolia (R. Br.) Griseb.) (Fig.7): arenarium, Poculum firmum, Bryoglossum gracile, Sarcoleotia globosa, Helvella corium, Arrhenia lobata and Laccaria maritima (Huhtinen 1987) from Arrhenia philonotis timberline areas in northern Québec. Most of the Lichenomphalia umbellifera taxa presented here also occur in other Galerina pseudomycenopsis circumpolar areas (Miller 1982, Knudsen and Inocybe hirculus Borgen 1982, Laursen and Chmielevski 1982, Lactarius torminosulus Gulden et al. 1985, 1988, Knudsen and Borgen Bryoglossum gracile 1998, Borgen 2006, Borgen et al. 2006, Knudsen Scutellinia patagonica and Vesterholt 2008, etc.) and in alpine habitats (Moser 1982, Senn-Irlet 1988, etc.). Also the Leccinum
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