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[{"key": "dc.contributor.advisor", "value": "Komonen, Atte", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "V\u00e1rkonyi, Gergely", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Puumala, Ilkka", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2019-01-25T11:00:21Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2019-01-25T11:00:21Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2019", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/62612", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Luonnon monimuotoisuus on t\u00e4rke\u00e4\u00e4 ekosysteemien ja ekosysteemipalveluiden s\u00e4ilymiselle, mutta maank\u00e4ytt\u00f6 uhkaa monien lajien selvi\u00e4mist\u00e4. Yksi suurimmista uhista monimuotoisuudelle on elinymp\u00e4rist\u00f6jen pirstoutuminen. K\u00e4\u00e4v\u00e4kk\u00e4\u00e4t ovat t\u00e4rkeit\u00e4 boreaalisten metsien puuaineksen hajottajia, mutta niiden kannanvaihteluista pirstoutuneessa mets\u00e4maisemassa tiedet\u00e4\u00e4n v\u00e4h\u00e4n. T\u00e4m\u00e4n tutkielman tavoitteena oli selvitt\u00e4\u00e4 k\u00e4\u00e4v\u00e4kk\u00e4iden kannanvaihteluita eristyneill\u00e4 kuusivaltaisilla vanhan mets\u00e4n laikuilla. Tutkimuksessa tarkastelin sek\u00e4 mets\u00e4laikkujen ett\u00e4 maisematason ominaisuuksien vaikutusta k\u00e4\u00e4v\u00e4kk\u00e4isiin. Ker\u00e4sin aineiston Kuhmosta 16 mets\u00e4laikulta, joilla oli tehty k\u00e4\u00e4v\u00e4k\u00e4skartoitus vuonna 1997. Tutkin kahdeksaa kuusella el\u00e4v\u00e4\u00e4 k\u00e4\u00e4v\u00e4k\u00e4slajia, joista 7 oli vanhan mets\u00e4n indikaattorilajeja. Viidell\u00e4 tutkimuslajilla mets\u00e4laikun el\u00e4v\u00e4n kuusen tilavuus korreloi positiivisesti k\u00e4\u00e4v\u00e4kk\u00e4iden asuttamien runkojen lukum\u00e4\u00e4r\u00e4n kanssa. Ruostek\u00e4\u00e4v\u00e4ll\u00e4 sek\u00e4 mets\u00e4laikun ett\u00e4 sen ymp\u00e4rist\u00f6n el\u00e4v\u00e4n kuusen tilavuudella oli positiivinen korrelaatio asuttujen runkojen lukum\u00e4\u00e4r\u00e4n kanssa mets\u00e4laikuilla. 20 vuoden aikana aarnik\u00e4\u00e4v\u00e4n asuttamien runkojen m\u00e4\u00e4r\u00e4 oli v\u00e4hentynyt ja ruostek\u00e4\u00e4v\u00e4n asuttamien runkojen m\u00e4\u00e4r\u00e4 oli lis\u00e4\u00e4ntynyt. Tulosten mukaan mets\u00e4laikun tuottavuudella on positiivinen vaikutus k\u00e4\u00e4v\u00e4kk\u00e4iden asuttamien runkojen m\u00e4\u00e4r\u00e4\u00e4n. 20 vuoden aikana ei havaittu selkeit\u00e4 viitteit\u00e4 sukupuuttovelasta. Tulosten perusteella vaikuttaa silt\u00e4, ett\u00e4 k\u00e4\u00e4v\u00e4k\u00e4slajit selvi\u00e4v\u00e4t pitki\u00e4 aikoja elinvoimaisina pienill\u00e4kin mets\u00e4laikuilla, mik\u00e4li laikun tuottavuus on riitt\u00e4v\u00e4\u00e4 lahopuuresurssin muodostumiseksi.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Biodiversity is important for the preservation of ecosystems and ecosystem services, but it is threatened by fragmentation of habitats. In boreal forests, wood-decaying fungi in the order Aphyllophorales are known for being vital in decaying coarse woody debris. However, little is known about their population dynamics in a fragmented landscape. The aim of this thesis was to study the population dynamics of Aphyllophorales in isolated old-growth forest fragments. I studied both the properties of the forest fragments and the area surrounding the fragments, and their effect on the number of Aphyllophorales individuals. I collected the data in Kuhmo from 16 spruce-dominated old-growth forest fragments, in which a polypore inventory was made in 1997. I studied eight species of Aphyllophorales, from which seven were indicator species for old-growth forests. The volume of living spruce trees in the forest fragments had a positive correlation with the number of logs inhabited in five of the study species. Phellinus ferrugineofuscus was affected positively also by the volume of living spruce trees within a two-kilometer buffer area around the fragments. In the last 20 years Phellinus nigrolimitatus had a decrease and Phellinus ferrugineofuscus had an increase in the number of logs inhabited. The results indicate that the productivity of the forest fragment has a positive impact on the number of Aphyllophorales individuals. No clear evidence of extinction debt was found with the study species in the 20-year period. It seems that wood-decaying fungi persist in isolated forest fragments if the productivity of the fragment is high, resulting in coarse woody debris as a resource for the species.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2019-01-25T11:00:21Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2019-01-25T11:00:21Z (GMT). No. of bitstreams: 0\n Previous issue date: 2019", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "56", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Boreaaliset mets\u00e4t", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "sukupuuttovelka", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "K\u00e4\u00e4v\u00e4kk\u00e4iden kannanvaihtelu pirstoutuneissa vanhoissa metsiss\u00e4", "language": "", "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-201901251310", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "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": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "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": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "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.oppiainekoodi", "value": "4011", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lahopuut", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kangasmets\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "pirstoutuminen", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "k\u00e4\u00e4v\u00e4kk\u00e4\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "k\u00e4\u00e4v\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "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": "", "language": null, "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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