Relevant bibliographies by topics / Lichens – Classification

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  2. Dissertations / Theses
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Academic literature on the topic 'Lichens – Classification'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Lichens – Classification"

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Petrzik, Karel, Igor Koloniuk, Hana Sehadová, and Tatiana Sarkisova. "Chrysoviruses Inhabited Symbiotic Fungi of Lichens." Viruses 11, no. 12 (December 3, 2019): 1120. http://dx.doi.org/10.3390/v11121120.

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A lichen body is formed most often from green alga cells trapped in a net of ascomycetous fungi and accompanied by endolichenic or parasitic fungi, other algae, and symbiotic or free-living bacteria. The lichen’s microcosmos is inhabited by mites, insects, and other animals for which the lichen is a source of food or a place to live. Novel, four-segmented dsRNA viruses were detected in saxicolous Chrysothrix chlorina and Lepraria incana lichens. Comparison of encoded genome proteins revealed classification of the viruses to the genus Alphachrysovirus and a relationship to chrysoviruses from filamentous ascomycetous fungi. We propose the names Chrysothrix chrysovirus 1 (CcCV1) and Lepraria chrysovirus 1 (LiCV1) as acronyms for these viruses. Surprisingly, observation of Chrysothrix chlorina hybridization with fluorescent-labelled virus probe by confocal microscope revealed that the CcCV1 virus is not present in the lichen body-forming fungus but in accompanying endolichenic Penicillium citreosulfuratum fungus. These are the first descriptions of mycoviruses from a lichen environment.
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Morozova, O. V., L. B. Zaugolnova, L. G. Isaeva, and V. A. Kostina. "Classification of boreal forests in the North of European Russia. I. Oligotrophic coniferous forests." Vegetation of Russia, no. 13 (2007): 61–81. http://dx.doi.org/10.31111/vegrus/2008.13.61.

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Results of a syntaxonomical study of the oligotrophic forests of northern European Russia are presented. The main forest types have been classified into 2 orders of the class Vaccinio-Piceetea, 4 alliances, 6 associations and 1 community. The new alliance Empetro-Piceion all. nov., which includes zonal spruce and birch northern forest association Empetro-Piceetum, has been established. These communities are formed according to cold temperature and high (sometimes temporarily) soil moisture and are characterized by the lower tree canopy, mosaic herb and moss-lichen layers with boreal mosses, sphagnum and lichens. In the middle taiga subzone these communities are replaced by Eu-Piceetum myrtilletosum. The forests with lichens are referred to order Cladonio-Vaccinietalia and divided into 4 associations. Lichen pine forests of the north-west of boreal zone were described as ass. Flavocetrario nivalis—Pinetum ass. nov. This association with a great number of lichens is differentiated by Cladonia arbuscula subsp. mitis, Flavocetraria nivalis, Cetraria ericetorum, Stereocaulon grande, Dicranum fuscescens, D. drummondii, Nephroma arcticum and species of Cladonia. The ass. Cadonio arbusculae—Pinetum (Caj. 1921) K.-Lund 1967 contains lichen pine forests with lower number of lichens and is distributed mostly in middle part of the taiga zone. The spruce-pine forests with mixed moss-lichen cover correspond to ass. Vaccinio-Pinetum. Ass. Hedysaro-Laricetum represents rich and well differentiated larch forests in the east of European Russia.
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Roux, Claude, Clother Coste, Thierry Ménard, André Bellemère, and Oliver Bricaud. "Lecanora vaenskaei Roux et C. Coste sp.nov. (Lichens, Ascomycotina), sa position systématique et celle des Rhizoplaca (Lecanorales, Lecanoraceae)." Canadian Journal of Botany 71, no. 12 (December 1, 1993): 1660–71. http://dx.doi.org/10.1139/b93-202.

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Lecanora vaenskaei Roux et C. Coste sp.nov. is described as a new saxicolous, calcifugous lichen species, discovered in southeastern France (Var Department). It differs from Lecanora chlorophaeodes Nyl. in its thallus, apothecia, paraphyses, spores and distribution. The classification of the new species is considered with respect to the genus Rhizoplaca, which is shown to belong to the family Lecanoraceae rather than the Parmeliaceae. Key words: lichens, Lecanoraceae, Lecanora, morphology, structure, distribution, ecology, systematics, Parmeliaceae, Rhizoplaca.
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Favero-Longo, Sergio E., Nicoletta Cannone, M. Roger Worland, Peter Convey, Rosanna Piervittori, and Mauro Guglielmin. "Changes in lichen diversity and community structure with fur seal population increase on Signy Island, South Orkney Islands." Antarctic Science 23, no. 1 (September 24, 2010): 65–77. http://dx.doi.org/10.1017/s0954102010000684.

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AbstractSigny Island has experienced a dramatic increase in fur seal numbers over recent decades, which has led to the devastation of lowland terrestrial vegetation, with the eradication of moss turfs and carpets being the most prominent feature. Here we demonstrate that fur seals also affect the other major component of this region’s typical cryptogamic vegetation, the lichens, although with a lower decrease in variability and abundance than for bryophytes. Classification (UPGMA) and ordination (Principal Coordinate Analysis) of vegetation data highlight differences in composition and abundance of lichen communities between areas invaded by fur seals and contiguous areas protected from these animals. Multivariate analysis relating lichen communities to environmental parameters, including animal abundance and soil chemistry (Canonical Correspondence Analysis), suggests that fur seal trampling results in the destruction of muscicolous-terricolous lichens, including several cosmopolitan and bipolar fruticose species. In addition, animal excretion favours an increase in nitrophilous crustose species, a group which typically characterizes areas influenced by seabirds and includes several Antarctic endemics. The potential effect of such animal-driven changes in vegetation on the fragile terrestrial ecosystem (e.g. through modification of the ground surface temperature) confirms the importance of indirect environmental processes in Antarctica.
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Millot, Marion, Amandine Dieu, and Sophie Tomasi. "Dibenzofurans and derivatives from lichens and ascomycetes." Natural Product Reports 33, no. 6 (2016): 801–11. http://dx.doi.org/10.1039/c5np00134j.

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Blanco, Oscar, Ana Crespo, John A. Elix, David L. Hawksworth, and H. Thorsten Lumbsch. "A molecular phylogeny and a new classification of parmelioid lichens containingXanthoparmelia­type lichenan (Ascomycota: Lecanorales)." TAXON 53, no. 4 (November 2004): 959–75. http://dx.doi.org/10.2307/4135563.

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Otálora, Mónica A. G., Per M. Jørgensen, and Mats Wedin. "A revised generic classification of the jelly lichens, Collemataceae." Fungal Diversity 64, no. 1 (October 12, 2013): 275–93. http://dx.doi.org/10.1007/s13225-013-0266-1.

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Shishkonakova, E. A., N. A. Avetov, and T. Yu Tolpysheva. "Peat soils of boreal regressive bogs in West Siberia: Problems of biological diagnostics and systematics." Dokuchaev Soil Bulletin, no. 84 (July 1, 2016): 61–74. http://dx.doi.org/10.19047/0136-1694-2016-84-61-74.

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In this paper we consider plant (geobotanical) indicators of soils, occurring in regressive bogs in the north taiga subzone of West Siberia. The specificity of regressive bogs is the difference between current vegetation and botanical composition of the peat surface horizon, which complicates their biological diagnostics. The data on peat botanical composition, degree of decomposition and thickness are presented. Destructive oligotrophic peat soils, the allocation of which is provided in the actual Russian soil classification at the level of subtype, occur in palsa bogs under shrub-lichen vegetation. Their indicators include lichens: Cladonia stellaris, C. rangiferina, C. stygia, C. arbuscula, C. mitis, Alectoria ochroleuca, Сetraria islandica, C. laevigata, Flavocetraria cucullata, F. nivalis, Govardia nigricans. A new subtype - peat oligotrophic regressive soils - which occurs in non-freezing bog is suggested. The indicators of this soil subtype in pine-shrub-sphagnum bogs are lichens Cladonia cenotea, C. chlorophaea, C. coniocraea, C. cornuta, C. crispata, C. deformis, C. gracilis, C. fimbriata, C. mitis, C. ochrochlora, C. pleurota, C. polydactyla, C. pyxidata, C. rangiferina, C. stellaris, C. subulata, C. sulphurina and liverwort Mylia anomala . The indicators of regressive soils in bog hollows are mainly liverwort Cladopodiella fluitans , mosses Warnstorfia fluitans , W. exannulata , and lichen Cetrariella delisei .
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Tibell, Leif. "Practice and Prejudice in Lichen Classification." Lichenologist 30, no. 4-5 (July 1998): 439–53. http://dx.doi.org/10.1006/lich.1998.0148.

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AbstractOrganismal species exist as historical entities, and essentialistic thinking about ‘ defining ’ species and higher taxa should be avoided. Lichens are biological phenomena that are best understood as processes, and they behave very differently from the model organisms of most systematic theories. Classification and phylogenetic reconstructions are seen as different endeavours, having different aims and languages. A hierarchical classification is supported, and recognition of superspecific taxa is seen as a matter of convenience. Superspecific taxa may be recognized as groups having correlated features, whereas the common recognition of such taxa by a priori cardinal characters should be abandoned. Superspecific taxa having correlated features are distinctive and are likely to be monophyletic. Distinctive and phylogenetically coherent grades may need naming to avoid nomenclatural instability. In classifications, the hypothesized monophyletic status of taxa may be indicated by some convention. Phylogenetic reconstruction by cladistic parsimony analyses includes assumptions that need scrutinizing and modifying to improve the methodology. Analyses should be examined with respect to robustness for changes in the frequently applied equal weighting assumption. For some types of data an a priori weight assignment might be possible, or equal weighting may be justified.
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MOTIEJŪNAITĖ, Jurga, Mikhail P. ZHURBENKO, Ave SUIJA, and Gintaras KANTVILAS. "Lichenicolous ascomycetes onSiphula-like lichens, with a key to the species." Lichenologist 51, no. 1 (January 2019): 45–73. http://dx.doi.org/10.1017/s0024282918000579.

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AbstractSixteen species of lichenicolous fungi are documented fromSiphula-like lichens. Two new genera based on new species are introduced.AmylogallaSuija, Motiej. & Kantvilas, characterized by I+ blue, K/I+ violet vegetative hyphae and ascomatal wall, immersed, cleistohymenial, yellowish to orange ascomata, unitunicate, non-amyloid, 8-spored asci and hyaline, ellipsoid, aseptate ascospores, is described fromParasiphulain Tasmania.SaaniaZhurb., characterized by superficial, stromatic, multilocular ascomata, non-amyloid hymenial gel, persistent periphysoids, bitunicate, non-amyloid, 4(–8)-spored asci and narrowly obovate to ellipsoid, 1(–3)-septate, initially hyaline and smooth-walled, later sometimes brown and verruculose ascospores, is described fromSiphulain South Africa. Four additional species are described as new: two fromSiphula(Cercidospora santessoniiMotiej., Zhurb., Suija & Kantvilas andStigmidium kashiwadaniiZhurb.) and two fromParasiphula(Endococcus hafellnerianusMotiej., Suija & Kantvilas andPyrenidium macrosporumMotiej., Zhurb., Suija & Kantvilas). Additional hosts and/or expanded geographical ranges are reported forAabaarnia siphulicola,Epigloea soleiformis, Plectocarpon gayanumandPyrenidium actinellum. The Southern Hemisphere is the centre of species richness for siphulicolous fungi, with 12 species restricted to this region. Taxa recorded for the Northern Hemisphere areSphaerellothecium siphulae(arctic and boreal) and the subcosmopolitanEpigloea soleiformisandPyrenidium actinellum, both of which are also known from various lichen hosts. The distribution of siphulicolous fungi strongly underpins the current generic classification ofSiphula-like lichens, with five species being confined exclusively toParasiphulaand nine toSiphula. A key to the taxa occurring onSiphulaandParasiphulais provided.
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Dissertations / Theses on the topic "Lichens – Classification"

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Semadi, Ammar. "Effets de la pollution atmosphérique (pollution globale, fluorée et plombique) sur la végétation dans la région de Annaba (Algérie)." Paris 6, 1989. http://www.theses.fr/1989PA066455.

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La région de Annaba (Est de l'Algérie) est soumise à une pollution atmosphérique intense et variée. L'utilisation des végétaux et notamment des lichens comme indicateurs biologiques a permis de préciser l'impact de la pollution globale, de la pollution fluorée et de la pollution plombique autour de Annaba. Ces trois aspects sont développés après la présentation des facteurs écologiques de cette région. L'observation des nécroses sur les feuilles de plusieurs espèces phanérogamiques et l'étude de la répartition des lichens ont permis d'établir une zonation de la pollution atmosphérique globale. L'accumulation du fluor chez les végétaux supérieurs et chez les lichens a été utilisée pour réaliser la cartographie de la pollution fluorée avec quatre zones d'isopollution autour de l'agglomération de Annaba. Enfin l'impact de la pollution plombique d'origine automobile a pu être précisé à partir de transects et de transplantation de lichens effectues de part et d'autre de trois principaux axes routiers desservant la ville de Annaba
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Savić, Sanja. "Phylogeny and taxonomy of Polyblastia and allied taxa (Verrucariaceae) /." Uppsala : Acta Universitatis Upsaliensis Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8326.

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Gueidan, Cécile, Do Truong Van, and Ngan Thi Lu. "Phylogeny and taxonomy of Staurothele (Verrucariaceae, lichenized ascomycetes) from the karst of northern Vietnam." Cambridge University Press, 2014. https://tud.qucosa.de/id/qucosa%3A39009.

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The crustose genus Staurothele (Verrucariaceae, Ascomycota) is a common component of the lichen flora from subneutral to alkaline silicate rocks in temperate to cold-temperate climates. Our field study in the karst system of northern Vietnam showed that it is also common on dry to humid limestone in the wet tropics. Molecular data revealed that species of Staurothele from Vietnam belong to an unnamed clade sister to the genus Endocarpon, together with the tropical Australian species Staurothele pallidopora and Staurothele diffractella, a North American species recently transferred to Endocarpon based on molecular data. The genus Willeya is here resurrected for this clade of crustose epilithic Staurothele with pale ascospores. Eight new combinations are proposed and three new species of Willeya are described from Vietnam. Sampling tropical members of a lichen family previously mostly known from temperate areas contributed significantly to improving its generic classification.
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Mühlstedt, Jens, Patrick Roßner, and Angelika C. Bullinger. "Die dunkle Seite des Lichts: Diskomfort durch Flicker bei (LED-)Lichtern im Straßenverkehr in Bezug zu peripheren Flimmerverschmelzungsfrequenzen." Technische Universität Berlin, 2013. https://monarch.qucosa.de/id/qucosa%3A20027.

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Leuchtdioden (light-emitting diode, LED) werden seit einigen Jahren mit hohen Wachstumsraten in allen Bereichen moderner Lichttechnik eingesetzt. Auch im Straßenverkehr, insbesondere bei Lichtzeichenanlagen wie z. B. Ampeln und in Scheinwerfern, kommen LEDs zum Einsatz. Dies hat verschiedene Vorteile, wie hoher Wirkungsgrad, längere Lebensdauer, kurze Ansprechzeiten und günstiges Defektverhalten. Speziell im Straßenverkehr steht diesen jedoch ein wesentlicher Nachteil entgegen: durch eine gepulste Ansteuerung der LEDs entsteht ein optischer Flicker: ein hochfrequentes Pulsieren der Lichter, das Diskomfort auslösen kann. Der Beitrag steht unter der Forschungsfrage des Diskomforts durch Flicker. Analysiert wird der subjektive Diskomfort im Bezug zu objektiven Flimmerverschmelzungsfrequenzen sowie Unterschiede von zentralen und peripheren Flimmerverschmelzungsfrequenzen. Die erste von zwei durchgeführten Studien hat zum Ergebnis, dass etwa ein Drittel der Probanden den Flicker wahrgenommen haben und davon etwa die Hälfte diesen als (sehr) unangenehm empfinden. Die periphere Flimmerverschmelzungsfrequenz differiert nach der zweiten Studie von der zentralen Flimmerverschmelzungsfrequenz und hat im Bereich zwischen 20° und 30° um den zentralen Sehpunkt um ca. 10 Hz höhere Frequenzen. Die zentrale Flim-merverschmelzungsfrequenz beträgt 47 Hz ± 5 Hz, die peripheren betragen um 25° etwa 54-56 Hz. Die Ergebnisse zeigen sehr deutlich, dass der Flicker seit der Nutzung von LEDs in Verbindung mit gepulster Ansteuerung ein relevantes Phänomen im Straßenverkehr ist. Technische sowie ergonomische Fragestellungen sind offen und bedürfen dringend einer Untersuchung. Insbesondere die Frage, wie es zu dem Diskomfort bei Frequenzen von 100-200 Hz verursacht durch Ampeln und Fahrzeugleuchten kommt, sollte beantwortet und in Vorgaben für die Leuchtenhersteller überführt werden.
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Hanke, Eva-Verena Julia. "Die Macht des Lichts: Helligkeit und Dunkelheit im sozialen Kontext." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-96468.

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Die vorliegende Arbeit umfasst drei empirische Beiträge, die der Frage nachgehen, ob und wie Helligkeit und Dunkelheit die Art und Weise verändern, wie Informationen wahrgenommen werden, Menschen interagieren oder Verhalten bewerten. Basierend auf Embodiment und Grounded Cognition-Ansätzen (Barsalou, 2008) wurde in drei Studienreihen der Einfluss von konzeptueller und perzeptueller Helligkeit bzw. Dunkelheit auf (1) die Informationsverarbeitung, (2) moralisches Urteilen und (3) Kooperation im sozialen Kontext untersucht. Die Ergebnisse demonstrieren die Bedeutsamkeit von Helligkeit und Dunkelheit im sozialen Kontext und bieten Implikationen im Verhandlungs- und Beratungskontext sowie moralischen Urteilens bei Gericht. In der ersten Studienreihe (Steidle, Werth, & Hanke, 2011) bestand das Ziel darin, die Wechselwirkung zwischen Dunkelheit, Abstraktionslevel und psychologischer Distanz zu untersuchen. Es wurde angenommen, dass die visuelle Wahrnehmung im Dunkeln weniger auf Details fokussiert ist, was zu mehr abstrakten Repräsentationen führen sollte. Basierend auf dem Grounded Cognition-Ansatz (Barsalou, 2008) wird argumentiert, dass sich die Beziehung zwischen physikalischer Dunkelheit und einem globalen perzeptuellen Verarbeitungsstil auf eine konzeptuelle Ebene überträgt. Drei Experimente demonstrierten, dass Dunkelheit im Vergleich zu Helligkeit einen globaleren perzeptuellen und konzeptuellen Verarbeitungsstil hervorrief, unabhängig davon, ob Dunkelheit geprimt oder physikalisch manipuliert wurde. Zusätzlich zeigten zwei IATs, dass Dunkelheit mit einem hohen Abstraktionslevel assoziiert ist. Des Weiteren wurde angenommen, dass Dunkelheit ebenso mit der Wahrnehmung psychologischer Distanz in Beziehung steht. Es wurde argumentiert, dass der Mangel an konkreten Informationen einerseits und die abstrakten Repräsentationen andererseits dazu führen, dass Personen und Objekte im Dunkeln nicht als Teil der unmittelbaren Erfahrung erlebt werden. Acht IATs belegten die implizite Beziehung zwischen Dunkelheit und den Distanzdimensionen: räumliche, zeitliche, hypothetische und soziale Distanz. Abschließend wurden Implikationen auf soziale Prozesse wie Vorurteile und Kooperation diskutiert. In der zweiten Studienreihe (Hanke, Steidle, & Werth, 2012) wurde der Frage nachgegangen, ob und wie Helligkeit und Dunkelheit moralische Kognitionen und Urteile verändern. Helligkeit kann als ein Zeichen moralischer Reinheit verstanden werden, die verteidigt wird, um das eigene Ansehen aufrechtzuerhalten. Dunkelheit dagegen als ein Zeichen von Unmoral und Verschwiegenheit, die eine Möglichkeit bietet, durch andere unbeobachtet zu sein. Basierend auf diesen metaphorischen Bedeutungen wurde argumentiert, dass Helligkeit im Vergleich zu Dunkelheit Prozesse aktiviert, das eigene Ansehen aufrechtzuerhalten – hier in Form einer erhöhten Normorientierung und stärkeren Verurteilens unmoralischem Handeln. In Studie 1 wurde zunächst gezeigt, dass Helligkeit verglichen mit Dunkelheit die Verfügbarkeit persönlicher Werte und Normen steigerte. Dementsprechend wurde angenommen, dass Personen, bei denen das Konzept Helligkeit aktiviert wird, unmoralische Handlungen stärker verurteilen, mehr negative moralische Emotionen zeigen und eher an moralischen Verhaltensabsichten festhalten sollten als Personen, bei denen das Konzept Dunkelheit aktiviert wird. Studie 2 belegte diese Annahme und demonstrierte den zu Grunde liegenden Prozess: die Orientierung an moralischen Normen. Ob unmoralische Handlungen als schlechte Absichten der handelnden Person gesehen werden oder durch äußere Umstände entschuldigt werden, hängt in hohem Maße von der sozialen Nähe zur handelnden Person ab (Studie 2A und 2B). Diese Ergebnisse tragen zum Verständnis des Embodiment moralischer Kognitionen bei und bieten praktische Implikationen für moralische Urteile bei Gericht. In der dritten Studienreihe (Hanke, Steidle, & Werth, 2012) wurde der Effekt von Dunkelheit auf Kooperation im sozialen Kontext aus der Perspektive sozialer Distanz untersucht. Es wurde argumentiert, dass Dunkelheit als ein Zeichen für soziale Distanz kompensatorisches Verhalten in Form von Kooperation auslösen kann, um die Distanz zum Interaktionspartner zu reduzieren. Fünf Studien belegten die Annahme, dass Dunkelheit unabhängig davon, ob Dunkelheit konzeptuell aktiviert oder physikalisch manipuliert wurde, Kooperation steigerte. Dieser Zusammenhang wurde durch das Gefühl von sozialer Nähe mediiert. Darüber hinaus wurden dispositionale und situationale Moderatoren der Beziehung zwischen Dunkelheit und Kooperation untersucht. Die Ergebnisse belegten, dass Dunkelheit Kooperation nur dann verstärkte, (1) wenn Kooperation half, das Bedürfnis nach Zugehörigkeit befriedigen zu können und (2) wenn Personen empfänglich für Umgebungsreize waren, die ein Bedürfnis nach sozialer Nähe auslösen konnten. Die wichtigste Implikation dieser Ergebnisse ist, dass Dunkelheit nicht in jeder Situation funktional ist, sondern nur dann, wenn soziale Distanz überwunden und soziale Nähe erreicht werden kann. In den folgenden Abschnitten wird zunächst auf die theoretische Grundlage dieser Arbeit eingegangen. Darauf aufbauend folgen ein kurzer Überblick der wichtigsten Erkenntnisse und die Vorstellung des Arbeitsmodells. Abschließend werden die theoretischen und praktischen Implikationen der vorliegenden Befunde diskutiert.
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Seyfried, Friederike. "2 Die Kraft des Lichtes: Die Sonnenreligion des Echnaton von Amarna und der biblische Psalm 104: [Universitätsvesper vom 25.06.2003]." Universität Leipzig, 2019. https://ul.qucosa.de/id/qucosa%3A33775.

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Pittam, Sherry K. "Pendent Usnea (Lichens; Ascomycetes; Parmeliaceae) in Western Oregon : taxonomy; morphological characters; and geographical distribution." Thesis, 1995. http://hdl.handle.net/1957/35317.

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Pendent Usnea species were collected in western Oregon and examined. Character states, such as cortex-medulla-axis ratio; fibril length; papilla diameter; branching patterns; and presence or absence of fibrils, papillae, soredia, isidia; plus chemistry, were recorded and analyzed by inspection for differences. Historical names were researched in the literature. A comparison was made between species concepts used in these accounts, with many conflicting concepts encountered. Selected morphological characters were examined by scanning electron microscope, or dissecting microscope, described, and illustrated. The characters reviewed included articulate fissures; isidia and soredia; cortex-medulla-axis ratio; papillae; and foveate pits. Species determinations were made for field collections. Names were found for all specimens inspected without introducing new names at this time. Eight pendent species were found in western Oregon; they are Usnea cavernosa, Usnea ceratina, Usnea fillpendula, Usnea hesperina subsp. liturata, Usnea inflata, Usnea leucosticta, Usnea longissima, and Usnea merrillii. A practical key to taxa with descriptions is provided and geographic distributions are recorded in tables and maps.
Graduation date: 1995
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Kubečková, Jana. "Mapování vybraných druhů hornin vrcholových partií Krkonoš s využitím laboratorní a obrazové spektroskopie." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-323456.

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Laboratory and image spectroscopy for mapping of selected rocks in peak areas of the Krkonoše Mountains Abstract This thesis deals with geological mapping of selected rocks in peak areas of the Krkonoše Mountains. Four areas of interest were situated in two parts of Krkonše Mountains - on the west side it is the area of Vysoké kolo and Harrachovy kameny and on the east side there is the area of Sněžka and the area of Kozí hřbety. The main data were acquired by the hyperspectral sensor APEX. Ground spectral measurments of selected rocks and block fields were executed and the laboratory spectral measurments of geological samples and lichens were executed. Practical part aims at classification of rocks and lichens in selected areas using four classification methods: SAM, SID, MESMA and LSU. The spectral library is one of the outputs of this thesis. This spectral library contains the spectra of pure rocks and lichens and mixtured spectra of rocks and lichens. The output of this thesis is the comparation of used classification methods, the analysis of spatial and geological accuracy and evaluation of lichens influence on the classification results, spectral library and maps of classified rocks occurrence. Keywords: classification, block fields, hyperspectral data, spectral mixture, lichens, The Krkonoše Mountains
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"Smart Material trifft Jahr des Lichts." SLUB Dresden, 2017. https://slub.qucosa.de/id/qucosa%3A7989.

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Workshop 2015 Veranstalter: Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU, Dresden / Technische Universität Dresden, Technisches Design / SLUB Dresden Ort: Makerspace der SLUB Dresden
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Norquay, Alan. "The application of spectral unmixing and supervised classification remote sensing techniques to Landsat 7 data for detecting arboreal lichen abundance." Thesis, 2000. http://hdl.handle.net/2429/10728.

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In British Columbia, mountain caribou (Rangifer tarandus caribou) rely on arboreal lichen as a main source of food during the late winter months. The animals spend a majority of the year at these higher elevations where old growth forests provide a suitable microclimate for the lichen genera Bryoria and, to a lesser extent, Alectoria. Caribou migrate there from lower areas when the snowpack solidifies sufficiently to allow efficient travel, possible by their unique hooves that spread to distribute weight. Forestry operations also have an interest in these old growth stands, and harvesting operations have begun to threaten the continued existence of mountain caribou in British Columbia. Efforts to determine caribou habitat, and the extent of that habitat, have been underway for many years. However, there has been an increase in the amount and intensity of research during the past six years, due largely to higher level planning processes that have identified the animals as a priority for inventory research programs. This research was focused on identifying stands of trees that contain arboreal lichen by using remotely - sensed data. While it is known that older stands are required for lichen growth, not all older stands have produced useful quantities of lichen. Since stands containing heavy loadings of arboreal lichen appear different to the naked eye than those with lesser loadings, it is reasonable to assume these differences can be measured with remote sensing techniques. The purpose of this work is to identify these differences using Landsat 7 data. I used a 30-metre pixel resolution Landsat scene collected on August 22 1999. Spectral unmixing, supervised classification and correlation analysis techniques where conducted, but no method was able to distinguish stands by the amount of lichen they contained. The reason this attempt did not succeed is probably due to the pixel size of the data (30 metres) versus the effect small clumps of lichen have on the reflectance recorded for those pixels. If data from a sensor with higher spatial resolution (e.g. IKONOS 4 meter data) where used in future work, the results may be more successful.
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Books on the topic "Lichens – Classification"

1

J, Galloway David. Checklist of New Zealand lichens. Christchurch, N.Z: DSIR Land Resources, 1992.

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1960-, Sinha G. P., and Botanical Survey of India, eds. Indian lichens: An annotated checklist. Kolkata: Botanical Survey of India, Ministry of Environment and Forests, 2010.

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Foliicolous lichens: A contribution to the knowledge of the lichen flora of Costa Rica, Central America. Berlin: J. Cramer, 1992.

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Sharma, Bharati Om. Saxicolous lichens of India: Checklist and keys. Dehra Dun: Bishen Singh Mahendra Pal Singh, 2014.

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Walker, F. Joy. The lichen genus Usnea subgenus Neuropogon. London: British Museum (Natural History), 1985.

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Abu-zinada, A. H. The lichens of Saudi Arabia: With a key to the species reported. Riyadh, Kingdom of Saudi Arabia: Arab Bureau of Education for the Gulf States, 1986.

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Dhar, Awasthi Dharani, ed. Lichenology in Indian subcontinent: A supplement to "A hand book of lichens". Dehradun, India: Bishen Singh Mahendra Pal Singh, 2000.

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Tehler, Anders. The genus Schismatomma (Arthoniales, Euascomycetidae). Copenhagen: [Council for Nordic Publications in Botany], 1993.

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Fałtynowicz, Wiesław. Porosty Pomorza Zachodniego: Studium ekologiczno-geograficzne. Gdańsk: Uniwersytet Gdański, 1991.

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Tehler, Anders. Syncesia (Arthoniales, Euascomysetidae). New York: Published for Organization for Flora Neotropica by the New York Botanical Garden, 1997.

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Book chapters on the topic "Lichens – Classification"

1

Rees, Paul A. "Protoctists, monerans, fungi, lichens and acellular organisms." In Key questions in biodiversity: a study and revision guide, 33–49. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248630.0003.

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Abstract This chapter contains questions about the classification and characteristics of a wide range of organisms including prokaryotes, protozoa, algae, slime molds, fungi, lichens and disease-causing microbes such as viruses and prions. The questions are divided into three levels: foundation, intermediate and advanced.
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Kumar, Pankaj, and Ameeta Sharma. "Analysis of International Patent Applications for Inventions Like Traditional Herbal Medicines." In Advances in Library and Information Science, 346–56. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9825-1.ch023.

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Numerous applications have been filed for patents based on bio-inventions in the Indian patent office. Although there is not any international patent, there is a system of international patent applications whereby the applicant may designate name of countries where they wish to file application for patents nationally. According to international patent classification, the concern class for such a patent applications is A61K36/00. More particularly, the international class (IC) A61K36/00 relates to medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof (e.g., traditional herbal medicines). International applications filings under patent cooperation treaty (PCT) for patent purposes can be accessed at the Patentscope (patent search tool of WIPO). All international patent applications for such TK-based inventions have been accessed online at Patentscope using the classification code A61K36 for this study.
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Çetin, Aydın, and Tuba Gökhan. "Differential Diagnosis of Erythematous Squamous Diseases With Feature Selection and Classification Algorithms." In Nature-Inspired Intelligent Techniques for Solving Biomedical Engineering Problems, 103–29. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4769-3.ch005.

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In this chapter, the differential diagnosis of erythematous diseases was determined using data mining and machine learning algorithms. In this chapter, data mining and its application to differential diagnosis of erythematous squamous diseases were discussed. A dermatology dataset from UCI Machine Learning Repository was used for the study. The dataset consists of 366 data items with 34 attributes. Initially, feature selection was made, and then classification was performed by using various algorithms. The number of attributes has been reduced from 34 to 19 as a result of the integration of the correlation-based filter methods and various heuristic search methods. The evaluation results show that Naive Bayes has 100% success rate in classification of psoriasis, seborrheic dermatitis, lichen planus, rose disease, chronic dermatitis, and pityriasis rubra pilaris diseases with 19 attributes selected with feature extraction algorithms.
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Conference papers on the topic "Lichens – Classification"

1

STRAUPE, Inga, and Līga LIEPA. "AN ASSESSMENT OF RETENTION TREES IN HYLOCOMIOSA FOREST TYPE IN SOUTHERN LATVIA." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.111.

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In Latvia the forest legislation requires that at least five living trees must be retained per hectare after clear-cutting. It is known that retention trees significantly increase the biodiversity in production forest landscape. After clear-cutting retention trees function as habitats for various lichens, mosses, insects, fungi and birds. Over time retention trees are incorporated into the young forests stand and provide presence of old trees, which is necessary for many endangered and rare species. After the death, these trees turn into coarse woody debris which is an essential habitat and feeding source for many taxa. However, the conservation and mortality of the retention trees has not been studied extensively because this approach has been established recently. The aim of this study was to evaluate development of the retention trees in Hylocomiosa type of forests in Southern Latvia. In total 12 young forest stands were surveyed in 2009 and 2015. The total area – 13.7 ha, on average forest stand size varies from 0.5 to 3.0 ha. All the studied sites were harvested in 2002, 2004, 2006 and 2008. All measurements of tree species, height, and diameter and defoliation class assessed and the status of tree (growing tree, coarse woody debris – snags, stems and downed logs) was indicated. Results show that after the studied period of seven years 24 retention trees died. Average level of the tree mortality is 15 %. The mortality level of Scots pine retention trees is 5.8 %, for aspen – 50 % and that for birch – 92.3 %. An average it is 8.5 green retention trees per 1 ha of young stand (22.9 m3 ha-1). On average 2.3 pieces coarse woody debris are per 1 ha of young stand (3.52 m3 ha-1), mostly - aspen wood (2.4 m3 ha-1). Woody debris of the young stands is divided to the first 4 decay levels according to classification (Stokland et al., 2001). 50 % of the listed woody debris is related to the 3rd decay level which means that woody debris is moderately decomposed.
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Boero, Veronica, Carlo A. Liverani, Massimiliano Brambilla, Ermelinda Monti, Filippo Murina, Roberto Tozzi, Eugenia DI Loreto, Chiara Maria F. Dell’utri, Giada Libutti, and Fabio Parazzini. "310 A new proposal for the clinical classification of vulvar lichen sclerosus: an observational prospective study." In ESGO SoA 2020 Conference Abstracts. BMJ Publishing Group Ltd, 2020. http://dx.doi.org/10.1136/ijgc-2020-esgo.47.

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