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Folia Cryptogamica Estonica 43 (2007)

Eric Steen Hansen
Lichens from Saqqaq and Qeqertaq, Central West Greenland [full version]
A total of 189 taxa of lichens are reported from two localities situated at the south coast of Nuussuaq Peninsula in Central West Greenland. The new combination Arctocetraria simmonsii (Krog) E. S. Hansen is proposed. Northern extensions of 15 species in West Greenland are presented. Geology, climate and vegetation of the localities are briefly treated.

Kuulo Kalamees
Checklist of some pleurotoid fungi (Agaricomycetidae, Basidiomycetes) of Estonia [full version]
10 pleurotoid species in four genera of Agaricomycetidae (Basidiomycetes) from the families Pleurotaceae (Pleurotus 5 species; Agaricales), Tricholomataceae (Phyllotopsis 1 species; Agaricales) and Polyporaceae (Lentinus 3, Neolentinus 1 species; Polyporales) have been recorded in Estonia. A checklist of these species with ecological, phenological and distribution data are presented.

Bellis Kullman & Burkhard Greve
Diversity of DNA and protein contents of spores of the closely related oyster fungi Pleurotus pulmonarius and P. ostreatus as studied by flow cytometry [full version]
For quantitative evaluation of nuclear DNA and protein contents of spores, the flow cytometer (PAS) with staining DAPI SR101 was employed. A total of 22 specimens of Pleurotus were studied. Bi-parametric analysis of spore DNA and protein contents revealed that fruitbodies of P. ostreatus produce one or two distinct spore populations the DNA and protein contents of bigger of which are comparable to those of P. pulmonarius that produces only one distinct spore population. The difference in genome size and chromosome number within P. ostreatus appears as heteroploidy (see Fungal Genome Size Database http://www.zbi.ee/fungal-genomesize/). We presume that the divergence that arises from a spore print reflects the fate of a hybrid genome in meiosis. Our results seem to confirm that parental genomes of different sizes segregate in meiosis. Zygotic meiosis can occur even in the case of low density of homology between chromosomes (CLP and aneuploidy) and may ensure distribution of highly different strains.

Liis Marmor & Tiina Randlane
Effects of road traffic on bark pH and epiphytic lichens in Tallinn [full version]
The relationships between traffic-related air pollution, bark pH and epiphytic lichen mycota on Pinus sylvestris and Tilia cordata were studied. Traffic is considered the main source of air pollution in Tallinn and, therefore, greatly influences lichen composition and species richness, their diversity increasing on Pinus sylvestris near roadways but decreasing on Tilia cordata. Traffic also affected bark pH of Pinus sylvestris, but not of Tilia cordata: the bark of Pinus sylvestris is normally acid (mean pH in control plot 3.0) and is modified to subneutral (up to 5.7) near roadways. The influence of alkaline dust pollution, connected with traffic, is clearly observed on epiphytic lichen composition of P. sylvestris in Tallinn. Besides dust, nitrogen oxides are important pollutants too, but the effects of acidic air pollution are less evident now compared to the previous studies.

Erast Parmasto
Phellinus laevigatus s. l. (Hymenochaetales): a ring species [full version]
Phellinus laevigatus s. l. has evolved as a ring species, which was distributed in Paleocene from the eastern part of Asia via North America to Europe and further to West Siberia. As a result of clinal variation of basidiospores, three allopatric taxa in two species evolved. Of the two species (European–West Siberian Ph. laevigatus s. str. and Ph. betulinus (Murrill) Parmasto, comb. nova), latter is composed of two subspecies (ssp. betulinus and ssp. orienticus Parmasto ssp. nova), one distributed in North America and the other in East Asia.

Lauri Saag
The substrate preferences of epiphytic Lepraria species in old-growth forests in Estonia [full version]
The study is based on herbarium specimens from the lichenological herbarium of the Natural History Museum of University of Tartu (TU). Altogether about 260 specimens were examined. Eight Lepraria species were found: L. borealis, L. eburnea, L. elobata, L. incana, L. jackii, L. lobificans, L. umbricola and L. vouauxii. Statistically significant substrate preferences were discovered both on generic and species levels using Chi-square test and Dufrene-Legendre indicator species analyses. On the genus level, norway spruce was favoured as a substrate. L. incana was shown to prefer norway spruce, L. elobata and L. lobificans the bark of deciduous trees and L. jackii was not associated with any substrate group analysed. L. borealis, L. eburnea, L. umbricola and L. vouauxii did not show any affinities in this study, probably due to low number of records.

Maret Saar
Seasonality in quantity of atmospheric fungal aerosol in Tartu (Estonia) [full version]
The quantity of fungal spores collected in routine aerobiological monitoring of atmosphere in Tartu 1989–1994 was studied with respect to two aspects: daily mean concentration (measured as the number of spores in cubic metre of air in 24 hours), and spore totals of a period (measured as the number of spores in cubic metre of air in a period). The aerobiological calendar method was used to indicate seasonal character of the quantity of spores. During the 6-year period the main spore season occurred from March to November, the total annual amount of fungal spores exceeded 1×106 spores in cubic metre per year. The seasonal dynamics was expressed clearly in both daily mean concentrations of spores and seasonal spore totals.

New Estonian Records [full version]
Leis, M. & Kannukene, L. Mosses
Kullman, B. & Tamm, H. Pezizales (Ascomycetes)
Suija, A., Leppik, E., Randlane, T. & Thor, G. Lichens and lichenicolous fungi

In memoriam: Maria F. Makarevych [full version]
In memoriam: Ain Raitviir [full version – bibliography]