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The liverworts of Île Amsterdam are surveyed. On the basis of historical collections and specimens collected on the island in 2006 and 2007 some 29 species and one variety belonging to 18 families have been recorded. This means that in comparison with the last survey of the island's hepatics, in 2002, the number of taxa has been nearly doubled. Of these, eight taxa are recorded for the first time from the island, namely Kurzia capillaris (Sw.) Grolle subsp. Stephanii (Renauld ex Steph.) Pós, Adelanthus lindenbergianus (Lehm.) Mitt., Syzygiella colorata (Lehm.) K.Feldberg, Váňa, Hentschel et J.Heinrichs, S. sonderi (Gottsche) K.Feldberg, Váňa, Hentschel et J.Heinrichs, Cephaloziella varians (Gottsche) Steph., Anastrophyllum auritum (Lehm.) Steph., Andrewsianthus marionensis (S.W.Arnell) Grolle and Heterogemma patagonica (Herzog et Grolle) L.Söderstr. et Váňa, whilst Aneura subcanaliculata R.M.Schust. is excluded from the island's hepatic flora. Two taxa, Kurzia capillaris subsp. Stephanii and Gymnomitrion subintegrum (S.W.Arnell) Váňa, are illustrated, and maps of global distribution are presented for Plagiochila minutula (Hook.f. et Taylor) Gottsche, Lindenb. et Nees, Andrewsianthus marionensis, Heterogemma patagonica, Mnioloma fuscum and Gymnomitrion subintegrum. The liverwort flora is distinctly south-temperate to tropical and these two main distribution patterns consist of 12 and eight species, respectively. The subantarctic element is represented by only three species, two species are endemic or near-endemic and five bipolar. Two names, Riccardia insularis Schiffn. and R. novo-amstelodamensis Schiffn., are lectotypified.
The results of bryological studies that were conducted on the territory of Katowice are presented. Katowice is the largest town in the main Polish industrial region (Silesia Province). The goal of the paper is to evaluate the impact of human pressure and the spatial structure of a town on the distribution of moss species. A great deal of habitat diversity is reflected in the quite high species richness. The moss flora includes 192 species, from which 14 are considered endangered in the national red list, seven are regionally endangered in the Silesia Province (four of those included in the former list and another three), and 48 taxa are under legal protection by the Polish government (36 not included in either of the former lists). In heavily urbanized areas of the city the number of species usually does not exceed 20 in one square kilometer. In squares that were more differentiated in regard to habitat conditions and in those with a greater forest cover, species richness amounted to almost 60. Some ecological aspects are discussed, e.g. the spatial polarization of calciphilous and acidophilous bryoflora.
Two species of the genus Philonotis Brid. described from subantarctic Îles Crozet are taxonomically assessed and some details of their gametophytes are illustrated. Philonotis angustifoliia Kaal. is conspecific with Ph. tenuis Taylor, and Ph. tenella Kaal. is identical to Ph. polymorpha (Müll.Hal.) Kindb. These taxonomic conclusions confirm the occurrence of Ph. tenuis in this subantarctic archipelago, whereas Ph. polymorpha is a new record for Îles Crozet and this discovery completes its circumsubantarctic range.
Eight fen moss species (Aulacomnium palustre, Bryum pseudotriquetrum, Calliergonella cuspidata, Campylium stellatum, Climacium dendroides, Hamatocaulis vernicosus, Plagiomnium elatum and Tomentypnum nitens) were studied in order to assess their ability to survive long-term drought. The mosses differed significantly in their desiccation resistance. The highest survival rate was shown in the hummock moss species Climacium dendroides, Aulacomnium palustre and Tomentypnum nitens, with more than 10% of stems surviving after 20 weeks of desiccation. On the other hand, in Campylium stellatum and Plagiomnium elatum, almost no stem survived after 6 weeks without water supply. The remaining mosses (Hamatocaulis vernicosus, Calliergonella cuspidata and Bryum pseudotriquetrum) showed medium desiccation resistance, which differed little among species. After 12 weeks of desiccation, less than 10% of their stems were able to restore their growth. In general, most species displayed remarkable desiccation resistance, unexpected for species from permanently wet fen habitats.
A new liverwort species, Cephaloziella integerrima (Lindb.) Warnst., has been identified for the bryophyte flora of Italy. The species was gathered in the snow-beds of the high Gavia Valley (Stelvio National Park, Lombardy). This work describes the distribution and ecology of this rare species.
Sarmentypnum tundrae (Arnell) Hedenäs est signalé pour la première fois en France (Hautes-Alpes) et pour l'ensemble de la chaîne des Alpes. Ses affinités écologiques et la nouvelle localité sont brièvement décrites. La répartition de l'espèce est discutée.
Recent studies in the Russian Far East have revealed the presence of Lejeunea neelgherriana Gottsche, a species centered in subtropical eastern Asia and new to the Russian liverwort flora. Considering the great distance between the Russian Far East and the area where this species is abundant, as well as the striking contrast between communities characteristic of this species and that of the surrounding locality area, L. neelgherriana in the Primorsky Territory may be considered to be a Tertiary relict. The locality where this taxon was collected also houses many species that are unusual in the Russian Far East, and may be treated as an isolated north temperate zone refugium for various taxa having south temperate to subtropical distributions. A morphological description of L. neelgherriana, illustrations based on collected material, and related discussion are provided.
Fissidens brevinervis is considered a pantropical species. The species, is reported new for Ascension Island, Ethiopia, India and El Salvador. Fissidens cryptoneuron is reduced to the synonymy of F. brevinervis.
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