Keywords: ICELAND/ NITROGEN FIXATION/ GLACIAL DRIFT/ PHYSIOLOGY
Abstract: 5 tab. 2 fig.
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Keywords: CO2 EXCHANGE/ TECHNIQUE/ ENZYME/ NITROGENASE/ PHYSIOLOGY/ ECOLOGY
Abstract: 4 figures.
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Keywords: CANADA/ NITROGEN FIXATION/ STEREOCAULON/ NORTHWEST TERRITORIES/ NITROGENASE
Abstract: [Data from studies of the nitrogen fixing capabilities of Stereocaulon paschale mats in the Northwest Territories "... suggest that simple predictive models are not yet able to accurately describe levels of nitrogenase activity in nature and that estimates of N-input on an annual or seasonal basis may be precarious."]
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Keywords: STEREOCAULON/ NORTHWEST TERRITORIES/ CANADA/ NITROGENASE/ NITROGEN FIXATION/ SEASONALITY
Abstract: 4 tables. 12 figures. [Study conducted on samples from Northwest Territories, Canada, showed that "...while nitrogenase activity in S. paschale at any point in time was dependent upon concurrent environmental conditions, it also was strongly influenced by pretreatment: both winter frost and thermal stress during summer droughts impeded recovery of nitrogenase activity following the onset of ameliorative conditions. It is suggested that a large fraction of the total annual N assimilation by S. paschale in drier, continental subarctic habitats may be achieved in summer during a few comparatively short episodes of suitable moisture conditions."]
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Keywords: ARCTIC/ CLADINA/ NITROGEN CYCLE/ NITROGEN FIXATION/ STEREOCAULON
Abstract: 9 fig. 1 plate [Study compares the nitrogen contributions of Stereocaulon paschale and Cladonia stellaris during natural rainfall events near Kevo in Finnish Lapland.]
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Keywords: CLADONIA/ NITROGEN/ STEREOCAULON/ MINERAL NUTRIENTS
Abstract: 12 figures. 3 tables. [Detailed review with comparisons to ectomycorrhizae. Both symbioses exploit periodic nutrient flushes, store nutrients in fungal tissues, and remobilize stored reserves to meet growth requirements of the photobiont.]
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Keywords: CULTURE/ MYCOBIONT/ TECHNIQUES
Abstract: 2 fig. [Discusses advantages of growing mycobionts on durapore membrane filters overlaying a defined agar medium.]
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Keywords: BRITISH LICHEN SOCIETY/ NEWSLETTER
Abstract: [News of activities of members of the British Lichen Society.]
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Keywords: NEWSLETTER
Abstract: [News about the British Lichen Society and its members; includes an article on churchyard lichens and another on new, rare or interesting British lichens. Reported new to Britain: Bispora lichenum, Bacidia igniarii, Buellia uberior, B. violaceofusca, Rinodina mniaraea var. cinnamomea, Staurothele geoica.]
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Keywords: GREAT BRITAIN/ NEWSLETTER
Abstract: [News and brief articles, several of which are cited separately in this list. New to Britain: Acarospora chlorophana, Blarneya hibernica. New to England: Micarea globulosella, Microcalicium disseminatum, Ptychographa xylographoides.]
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Keywords: DOMINANCE/ NECROMASS/ NUTRIENT RECYCLING/ SUCCESSION
Abstract: 2 fig. ["Marked vertical gradients in concentrations of N, P and K in thalli of mat lichens, together with results of N budget studies in Cladonia stellaris and Stereocaulon paschale, suggest that these key elements may be recycled internally to fund new growth at the apices."]
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Keywords: BIOTECHNOLOGY/ MEDICINE/ MYCOBIONT CULTURE
Abstract: 3 fig. 2 tab.
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Keywords: GREAT BRITAIN/ NEWSLETTER
Abstract: [Includes news, items of general interest, and brief articles, one of which is cited separately in this list. New to Britain: Parmelia submontana, Lecidea exigua, Stigmidium hageniae, Cladonia asahinae, Lecidella patavina, Thelidium aeneovinosum, Buellia badia.]
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Keywords: BRITAIN/ NEWSLETTER
Abstract: [News and several brief articles (cited separately). This issue includes obituaries for Emanuel Rudolph and Dougal Swinscow. New to Britain: Bacidia myrtillicola, Parmelia submontana.]
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Keywords: GREAT BRITAIN/ NEWSLETTER
Abstract: [News and brief articles from the members of the society. A separate supplement to this issue is a new checklist of lichens of Great Britain and Ireland (cited separately). New to Britain: Carbonea assimilis, Lecanora pannonica, Leptogium byssinum, Lichinodium sirosiphoideum, Lopadium coralloideum, Rhizocarpon ochrolechiae, Rimularia sphacelata, Skyttea tephromelarum.]
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Keywords: CHURCHYARDS/ GREAT BRITAIN/ NEWSLETTER
Abstract: [News about the British Lichen Society and its members; includes several notes on the churchyard lichens project, a proposal for a new definition of the term microlichen, a brief article on Lecanora pannonica and its distribution in Great Britain, and another on new, rare or interesting British lichens. New to Britain: Absconditella annexa, Acarospora durietzii, Arthonia almquistii, Dactylospora attendenda, D. australis, Lecanora navarrensis, Lichenochora inconspicua, Mycoporum hippocastani, Parmelia protomatrae, Sarcopyrenia cylindrospora, Sphaerellothecium minutum, Verrucaria carnea, Vezdaea stipitata.]
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Keywords: GREAT BRITAIN/ NEWSLETTER
Abstract: [News from the British Lichen Society and its members; also includes several brief articles (cited separately), as well as a note on the "Churchyards Project" and a list of new or interesting British lichen records. New to British Isles: Absconditella lignicola, Micarea curvata, M. marginata, Miriquidica liljenströemii, Rhizocarpon cinereonigrum, Sagediopsis aquatica.]
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Keywords: CHURCHYARDS/ GREAT BRITAIN/ NEWSLETTER/ NOMENCLATURE
Abstract: [News from the British Lichen Society and its members. Also includes several brief papers (cited separately), a note about the nomenclatural changes resulting from the new ICBN (Tokyo), a report on the churchyard lichens project, a brief bibliography pertinent to British lichenology, and notes on new or rare lichens for the British Flora. New to the British Isles: Rinodina flavosoralifera, Xanthoria fulva.]
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Keywords: ARCTIC/ BOREAL/ C/ N RATIOS/ CARBON RATIOS/ MAT-FORMING/ NITROGEN FIXATION/ PHOSPHORUS
Abstract: 6 fig. 3 tab. [Detailed review of the role of nitrogen in lichen growth in oligotrophic boreal-arctic environments. "Data reviewed are largely consistent with the proposal that non-N2-fixing mat-forming lichens are N-limited. This possibity is discussed in relation to N2-fixation and water availability as potential factors affecting lichen growth."]
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Keywords: ACETYLENE REDUCTION/ ACID RAIN/ NITROGEN FIXATION/ NITROGENASE/ NUTRITION
Abstract: 4 fig. 2 tab.
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Keywords: BLS/ NEWSLETTER
Abstract: [News from the Society and its members; includes several short papers (cited herein), several notes on churchyard lichens projects and field meetings, a brief bibliography pertinent to british lichens, and a list of new, rare, and interesting lichen records. New to the British Isles: Acremonium lichenicola, Buellia papillata, Lecidea luteoatra, Lepraria boralis, L. elobata, Micarea elachista, Rhizocarpon submodestum, Rinodina colobinoides, R. degeliana, R. fimbriata, Wentiomyces lichenicola.]]
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Keywords: BLS/ NEWSLETTER
Abstract: [News from the Society and its members; includes several short papers (cited herein) including a history of the society, a note on the churchyard lichens project, a brief bibliography pertinent to british lichens, and a list of new, rare, and interesting lichen/lichenicolous fungi records. New to the British Isles: Lecidea lapillicola, Opegrapha rotunda, Phaeosporobolus alpinus, Sphaerellothecium propinquellum, Stigmidium congestum.]
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Keywords: ASCOSPORE GERMINATION/ LICHENICOLOUS/ MYCOBIONT CULTURE
Abstract: 1 tab. 1 appendix ["Isolation into pure culture was attempted on 1183 species (2238 specimens) of lichen-forming and lichenicolous fungi from diverse ecosystems and systematic groups (covering 14 ascomycete orders, 77 families and 280 genera), in 20 countries. Four hundred and ninety three species (42%) were successfully isolated either from ascospores (or basidiospores, or conidia) or photobiont-free fragments from thallus macerates."]
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Keywords: GREAT BRITAIN/ NEWSLETTER
Abstract: [News and notes from society members. This issue also contains news from IAL3 in Salzburg. New to the British Isles: Lecidea haerjedalica, L. mucosa (previously listed as a synonym of L. turgidula), L. promiscens, L. promiscua, L. syncarpa, Phylliscum demangeonii, Pseudephebe minuscula, Pyrrhospora rubiginans.]
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Keywords: BLS/ NEWSLETTER
Abstract: [News from the Society and its members; includes several short papers (cited herein) and notes on field meetings, reservoir drawdowns, lichen reinvasion of London, the role of computers and the internet in lichenology, and a list of new, rare, and interesting lichens and lichenicolous fungi for the British Isles. New to the British Isles: Cladonia arbuscula ssp. arbuscula, Lichenodiplis lichenicola, Phoma physciicola, Porpidia zeoroides, Scutula solorinaria, Strigula lateralis.]
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Keywords: NH4/ NITROGEN/ NITROGEN SOURCES/ NITROGEN UPTAKE/ NO3/ OXYGEN DEPRIVATION/ USNEA
Abstract: 3 fig. [Study conducted on Usnea sphacelata.]
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Keywords: ACID RAIN/ AIR POLLUTION/ CATIONS/ CLADONIA/ ELEMENT ANALYSIS/ HEATHLAND/ PH
Abstract: 7 fig. 2 tab.
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Keywords: BORRER, W/ CHURCHYARDS/ DOBBS, CG/ GREAT BRITAIN/ NEWSLETTER
Abstract: [News, notes and opinions from society members, as well as several short articles, cited separately herein. Additionally, this issue contains an obituary for C. Geoffrey Dobbs, a brief biography of William Borrer and further news on the churchyard lichens project. New to British Isles: Aspicilia moenium, Cladonia alpina, Dermatocarpon deminuens, Lecanora ochroidea, Lithothelium aff. phaeosporum, Macrophomina pseudeverniae, Melaspilea bagliettoana, Niesslia lobariae, Opegrapha glaucomaria, Stigmidium arthoniae, S. epiramalina, S. pumilum, S. tabacinae.]
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Keywords: ANTARCTIC/ NUTRIENT EXCHANGE/ NUTRIENT FLOW/ NUTRIENT RELEASE/ USNEA
Abstract: 6 fig. 2 tab. ["Concentrations of NH4+, NO3-, PO4---, K+, Ca++ and Mg++ in snow meltwater resulting from summer snow showers were monitored before and afer its passage through monospecific stands of the Antarctic macrolichen Usnea sphacelata R. Br."]
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Keywords: ACID RAIN/ AIR POLLUTION/ BIOMASS/ CLADONIA/ GROWTH RATES/ HEATHLAND/ NITROGEN DEPOSITION
Abstract: 4 fig. 2 tab.
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Keywords: CLADONIA/ MINERAL UPTAKE/ PHOSPHATE/ PHOSPHATE EXCHANGE
Abstract: 2 fig.
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Keywords: AIR POLLUTION/ CLADONIA/ NITROGEN/ NUTRIENT CYCLES/ PHOSPHORUS
Abstract: 9 fig. 5 tab.
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Keywords: GRAPHIS/ PHAEOGRAPHIS/ POLYMORPHISM/ RAPD ANALYSIS/ REPRODUCTIVE STRATEGIES/ SEXUAL REPRODUCTION
Abstract: [Abstract from presentation at IMC6, held in Jerusalem, August 23-28, 1998.]
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Keywords: AXENIC CULTURE/ DNA/ GENETIC VARIABILITY/ MOLECULAR BIOLOGY/ RAPD ANALYSIS
Abstract: 3 fig. [Study of RAPD markers in axenic cultures of species of Graphis and Phaeographis. "DNA extracted from whole thalli of G. scripta was also subjected to RAPD-PCR but the fingerprints produced differed from those given by axenic cultures of the mycobiont. Therefore difficulties of interpretation may arise when whole thalli are used in RAPD analyis."]
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Keywords: AXENIC CULTURE/ GROWTH RATES/ MYCOBIONT/ MYCOBIONT CHEMISTRY/ MYCOBIONT CULTURE/ SEM
Abstract: [Abstract from the International Association for Lichenology's fourth symposium, held in Barcelona, Spain, 3-8 September 2000.]
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Keywords: ACID RAIN/ ALLELOPATHY/ GRAZING/ GROWTH/ NITROGEN FIXATION/ NUTRIENT CYCLING/ TRAMPLING
Abstract: 5 fig. [From "The Tenth Arctic Ungulate Conference, 9-13 August, 1999, Tromso, Norway.]
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Keywords: HISTORY/ JOURNAL
Abstract: [Comment on the retirement of D. H. Brown from his 12 year role as Senior Editor of the Lichenologist.]
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Keywords: DNA/ DNA FINGERPRINTING/ GENETIC DIVERSITY/ INDIVIDUAL/ MOLECULAR BIOLOGY
Abstract: [Abstract from the International Association for Lichenology's fourth symposium, held in Barcelona, Spain, 3-8 September 2000.]
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Keywords: CLADONIA/ NUTRIENT TRANSFER/ PHOSPHORUS
Abstract: 5 fig. ["The results are consistent with the hypothesis that P is recycled within podetia of mat-forming lichens, migrating from degrading basal regions upwards to the growing apices following a source-sink relationship."]
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Keywords: CATIONS/ CLADONIA/ TECHNIQUES/ TEMPERATURE
Abstract: 1 fig.
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Keywords: BREEDING SYSTEMS/ GENETIC DIVERSITY/ HETEROTHALLISM/ HOMOTHALLISM/ SEXUAL REPRODUCTION/ SEXUAL STRATEGIES
Abstract: 1 fig. [Molecular study of genetic diversity of single-spore progeny and (indirectly) of breeding systems in Graphis scripta and Ochrolechia parella. "In both species, these markers revealed that spores from the same ascoma are genetically uniform, providing compelling evidence of homothallism."]
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Keywords: DNA/ GENETIC VARIABILITY/ GENETICS/ MOLECULAR BIOLOGY/ PCR/ REVIEW
Abstract: 4 fig. [Review article.]
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Keywords: GROWTH RATES/ MASS/ SEASONAL VARIATION/ STEREOCAULON
Abstract: 1 tab. ["Mass increases in S. paschale were readily measurable and showed clear seasonal variation."]
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Keywords: CLIMATE/ CRYPTIC SPECIES/ GENETIC DIVERSITY/ METABOLISM/ MOLECULAR PHYLOGENY/ PHYSIOLOGY/ TEMPERATURE/ XANTHORIA
Abstract: 5 fig. 2 tab. ["Genetic and physiological diversity was assessed in isolates of the lichen-forming fungus Xanthoria elegans originating from a range of geographic localities and climatic regimes including polar and temperate regions. In vitro cultures were established and isolates examined by production of multi-locus RAPD markers and by sequence comparison of the ITS region of the rDNA tandem repeat unit."]
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Keywords: ARCTIC/ ATMOSPHERIC DEPOSITION/ BIOINDICATION/ NITROGEN DEPOSITION/ RUSSIA/ SNOW
Abstract: 9 fig. 1 tab.
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Keywords: HETEROCYSTS/ NITROGEN FIXATION/ NITROGENASE/ THYREA
Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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Keywords: CLADONIA/ NITROGEN/ UPTAKE
Abstract: 2 fig. 1 tab.
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Keywords: BREEDING SYSTEMS/ CLADONIA/ DNA/ SEX
Abstract: [Abstract from "The 5th Symposium of the International Association for Lichenology" held in Tartu, Estonia, 16-21 August 2004.]
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Keywords: CLADONIA/ ECOLOGY/ NUTRIENT CYCLING/ GLYCINE/ AMMONIUM/ NITROGEN TRANSLOCATION/ SCOTLAND
Abstract: [Study conducted in a heathland in Scotland. "This recurrent relocation of resource in a source-to-sink relationship is compelling evidence of recycling: of N allocated to structural and metabolically functional components of physiologically active cells within vegetative mycelium (and algal cells), subsequently remobilized and transported via cytoplasmic pathways into younger cells."
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Keywords: SEXUAL REPRODUCTION/ ANTARCTICA/ ECOPHYSIOLOGY/ BREEDING SYSTEMS
Abstract: [General review of the evolutionary implications for persistence of sexual reproduction in lichens under Antarctic conditions.
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[ET: 3876]
Keywords: BREEDING SYSTEMS/ CLADONIA/ HOMOTHALLISM/ RAPD ANALYSIS
Abstract: 5 fig. 1 tab. [Study of three species: Cladonia floerkeana, C. galindezii and C. portentosa.]
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Keywords: POLLUTION/ EUROPEAN RUSSIA/ REINDEER LICHENS/ CLADONIA/ HEAVY METALS
Abstract: ["Vorkuta and its environs suffered the worst impacts, with significant metal loading and alkalization in lakes and topsoils, elevated metals and cations in terricolous (reindeer) lichens, and changes in vegetation communities."
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Keywords: NITROGEN FIXATION/ CYANOBACTERIA/ THYREA/ DIURNAL PERIODICITY
Abstract: [Study on Thyrea girardii and T. confusa showed a diurnal pattern of nitrogen fixation. "We suggest carbon flow to the fungal symbiont reduces the potential for nitrogenase activity in the dark."]
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Keywords: NEUROPOGON/ ANTARCTICA/ USNEA/ BIPOLAR LICHENS/ PARMELIACEAE
Abstract: [Study 400 specimens of 5 taxa using morphological and molecular (ITS and RPB1) characters. "Phylogenetic analyses indicated that species circumscription in the Neuropogon group needs revision, with the principal species being non-monophyletic. None of the morphological characters, or groups of characters, used in this study proved to be completely unambiguous markers for a single species. However, axis thickness was supported as being informative for the identification of monophyletic lineages within the group."
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Keywords: ANTARCTICA/ GENERAL/ POPULAR
Abstract: [Popular article on biology and diversity of lichens in Antarctica.]
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Keywords: ASCOMYCETE PHYLOGENY/ LICHENIZATION/ LECANOROMYCETES/ MOLECULAR PHYLOGENETICS/ ANCESTRAL CHARACTER RECONSTRUCTION
Abstract: [Results of a 6-gene, 420 species maximum likelihood phylogenetic analysis. "All lichen taxa are restricted to "Leotiomyceta" and are members of Candelariales, Lecanoromycetes, "Dothideomyceta," Eurotiomycetes, and Lichinomycetes. In contrast to previous studies, these analyses support multiple origins of lichenization events with the loss of lichenization as less frequent and limited to terminal, closely related species."]
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Keywords: RUSSIA/ AIR POLLUTION/ HEAVY METAL/ BIOINDICATION/ OIL AND GAS INDUSTRIES/ ENVIRONMENTAL CHEMISTRY/ RUSSIAN ARCTIC/ FORESTRY
Abstract: ["Chemistry of lichens, topsoil, lake water and sediments, plus diversity of lichens, birds and aquatic indicators along with landscape analysis were measured at eight sites in the PR [Pechora Region] to access local impacts of oil/gas and forestry operations."]
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Keywords: PHOSPHOMONOESTERASE/ CLADONIA/ NITROGEN ENRICHMENT/ PHOSPHORUS/ BIOINDICATION/ N:P RATIO/ NITROGEN DEPOSITION/ AMMONIUM/ HEATHLAND LICHENS
Abstract: [Field study in Scotland over 4 years. "Nitrogen enrichment induces P-limitation in C. portentosa with attendant changes in chemical and physiological characteristics that could be used as sensitive biomarkers with which to detect low levels of N pollution."]
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Keywords: CLADONIA/ SCOTLAND/ ENGLAND/ UNITED KINGDOM/ NITROGEN ENRICHMENT/ PHOSPHATASE ACTIVITY/ N:P RATIO/ NITROGEN DEPOSITION/ PHOSPHORUS
Abstract: [Experiments on material from various sites in the United Kingdom. "Nitrogen enrichment changes lichen N:P ratios from values typical of N limitation (for example, 10) to those indicative of P limitation (for example, 26) driving upregulation of PME [phosphomonoesterase] activity."]
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Number of hits shown/total: 59/59.
Number of records in database: 41574.
Current date: 2024.12.13.OK