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[{"key": "dc.contributor.advisor", "value": "Purhonen, Jenna", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Kosonen, Timo", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Madi, Aliisa", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-11T08:47:19Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-11T08:47:19Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2025", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/103390", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Helotiales- sienet ovat ovat yksi maailman monimuotoisimmista kotelosieniryhmist\u00e4, mutta ne tunnetaan puutteellisesti. Suurin osa Helotialeksista on saprofyyttej\u00e4 ja el\u00e4\u00e4 lahopuulla. Pienten kotelosienten monimuotoisuuteen vaikuttavat tekij\u00e4t tunnetaan yleisesti heikosti. T\u00e4m\u00e4n tutkielman p\u00e4\u00e4m\u00e4\u00e4r\u00e4n\u00e4 oli selvitt\u00e4\u00e4 Helotiales- sienten monimuotoisuutta luonnollisesti kaatuneilla suurikokoisilla maalahopuilla. Aineistoa ker\u00e4ttiin nelj\u00e4lt\u00e4 eri luonnontilaiselta mets\u00e4alueelta Suomesta. Tutkin yhteis\u00f6tason vasteita mittaamalla Helotialeksien lajirunsautta ja yhteis\u00f6jen v\u00e4lisi\u00e4 eroja suhteessa lahopuun ja ymp\u00e4rist\u00f6n laatuun liittyviin tekij\u00f6ihin. Tutkimuksessa inventointiin yhteens\u00e4 96 maalahopuuta, jotka edustivat 4 eri puulajia. Tutkimuksen aikana l\u00f6ydettiin yhteens\u00e4 129 Helotiales- lajia, joista 64% esiintyi viisi kertaa tai v\u00e4hemm\u00e4n. Keskim\u00e4\u00e4r\u00e4inen lajim\u00e4\u00e4r\u00e4 rungolla oli 10,5. Tilastollisissa analyyseiss\u00e4 k\u00e4ytin yleistettyj\u00e4 lineaarisia sekamalleja tutkiessani lajirunsauteen vaikuttavia tekij\u00f6it\u00e4, ja yhteis\u00f6analyysi\u00e4 tutkiessani yhteis\u00f6koostumukseen vaikuttavia tekij\u00f6it\u00e4. Sek\u00e4 Helotialeksien lajirunsauteen ett\u00e4 yhteis\u00f6koostumukseen vaikuttavat tekij\u00e4t olivat puulaji, rungon tilavuus ja sammalpeitteisyys. Lis\u00e4ksi yhteis\u00f6koostumukseen vaikuttivat kaarnapeitteisyys ja lahoaste. Vaikutukset vaihtelivat hieman puulajeittain. Tutkimusalueiden tai kosteiden ja kuivien elinymp\u00e4rist\u00f6tyyppien v\u00e4lill\u00e4 ei ollut eroja lajirunsaudessa tai yhteis\u00f6koostumuksessa. My\u00f6sk\u00e4\u00e4n populaation horisontaalisella sijainnilla rungolla ei ollut vaikutusta lajirunsauteen tai yhteis\u00f6koostumukseen. Tuloksista voidaan p\u00e4\u00e4tell\u00e4, ett\u00e4 Helotialeksien monimuotoisuuteen vaikuttavat tekij\u00e4t ovat paikallisia ja liittyv\u00e4t l\u00e4hinn\u00e4 lahopuun laatuun. Isokokoisella lahopuulla ja lehtipuulla oli eniten lajeja. My\u00f6s lahopuun kosteuspitoisuutta lis\u00e4\u00e4vill\u00e4 tekij\u00f6ill\u00e4, kuten sammalpeitteisyydell\u00e4, oli positiivinen vaikutus lajirunsauteen.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Helotiales are a largely unknown group of fungi and one of the most diverse groups of apothecial ascomycetes. Most Helotiales are known to be saprophytic, with a lot of species living on deadwood. The factors affecting the diversity of small ascomycetes are generally poorly understood. In this thesis my goal was to describe the diversity of Helotiales species on naturally downed large-sized deadwood on four different natural forest sites in Finland. In more detail I studied the community level responses in species richness and -composition of Helotiales to different variables related to deadwood and forest quality. A total number of 96 deadwood logs representing 4 different tree species were examined for Helotiales fruitbodies. A total number of 129 species was found on all study logs combined, of which 64 percent appeared five times or less. The average number of species per log was 10,5. I used generalized linear mixed models to study the Helotiales species richness, and Nonmetric Multidimensional Scaling with permutation test to study the effects on community composition. The variables that had an effect on Helotiales species richness and community composition on all study logs in general were tree species, log volume and moss coverage. Additionally the variables that affected community composition were bark coverage and decay stage. The effects varied slightly between tree species. There was no difference in species richness or community composition between study sites, wet and dry habitat types or horizontal positions on the log. From these results, it can be concluded that the factors that affect the diversity of Helotiales fungi are mostly local and are closely tied to the quality of deadwood. As earlier studies suggest, larger deadwood hosts more species, as does deciduous deadwood. Qualities that capture moisture in the deadwood, like high moss coverage, also seem to have a positive effect on species richness.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2025-06-11T08:47:19Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-11T08:47:19Z (GMT). No. of bitstreams: 0\n Previous issue date: 2025", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "39", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Helotiales", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Ascomycota", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "deadwood", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "boreal forests", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Saproxylic species", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "community ecology", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "habitat quality", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Helotiales fungi : ecology, habitat requirements and occurrence in Finnish natural forests", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202506115189", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ekologia ja evoluutiobiologia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ecology and evolutionary biology", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": "fi", "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "restrictedAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.yso", "value": "luonnonmets\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lahopuut", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "mets\u00e4ekologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "eli\u00f6yhteis\u00f6t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "sienet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kotelosienet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "Tekij\u00e4 ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyv\u00e4skyl\u00e4n yliopiston kirjaston arkistoty\u00f6semalta. Ks. https://kirjasto.jyu.fi/fi/tyoskentelytilat/laitteet-ja-tilat#autotoc-item-autotoc-2", "language": "fi", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "The author has not given permission to make the work publicly available electronically. Therefore the material can be read only at the archival workstation at Jyv\u00e4skyl\u00e4 University Library (https://kirjasto.jyu.fi/fi/tyoskentelytilat/laitteet-ja-tilat#autotoc-item-autotoc-2.", "language": "en", "element": "rights", "qualifier": "accessrights", "schema": "dc"}]
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