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[{"key": "dc.contributor.advisor", "value": "Haimi, Jari", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Kataja-aho, Saana", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Mensonen, Kirsi", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-02-17T15:52:36Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-02-17T15:52:36Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2015", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1466478", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/45347", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kantojen korjuu energiapuuksi on vastik\u00e4\u00e4n yleistynyt mets\u00e4nuudistamisessa, eik\u00e4 sen ymp\u00e4rist\u00f6vaikutuksia viel\u00e4 t\u00e4ysin tiedet\u00e4. T\u00e4m\u00e4n tutkielman tavoitteena oli selvitt\u00e4\u00e4 1) kantojen korjuun vaikutusta maaper\u00e4n hajottajael\u00e4imist\u00f6lle (\u00e4nkyrimadot, punkit, hyppyh\u00e4nt\u00e4iset) verrattuna perinteisesti mets\u00e4nuudistamisessa tehtyyn laikkum\u00e4t\u00e4stykseen, 2) hajottajael\u00e4inyhteis\u00f6jen mahdollisia eroja mets\u00e4nuudistamisessa aikoinaan rikkoutuneen ja ehj\u00e4n\u00e4 s\u00e4ilyneen maanpinnan v\u00e4lill\u00e4 ja 3) avohakkuun vaikutusta hajottajael\u00e4inyhteis\u00f6ihin, kun uudistustoimista oli kulunut kymmenkunta vuotta. Tutkimusalue sijaitsi Keski-Suomen ja Pirkanmaan alueella L\u00e4ngelm\u00e4ell\u00e4. Koealoina toimivat kymmenen vuonna 2005 avohakattua kuusivaltaista metsikk\u00f6\u00e4, joista viidell\u00e4 oli tehty kantojen korjuu ja t\u00e4ydennyslaikutus ja 5 oli laikkum\u00e4t\u00e4stetty (kontrolli). Lis\u00e4ksi saman seudun hakkaamattomista kuusivaltaisista metsist\u00e4 valittiin 5 koealaa. Maaper\u00e4el\u00e4inn\u00e4ytteet otettiin aloilta kev\u00e4\u00e4ll\u00e4 ja syksyll\u00e4 2014 k\u00e4ytt\u00e4en putkikairaa. \u00c4nkyrimadot eroteltiin n\u00e4ytteist\u00e4 m\u00e4rk\u00e4suppilomenetelm\u00e4ll\u00e4 ja mikroniveljalkaiset kuivasuppilomenetelm\u00e4ll\u00e4. Maaper\u00e4el\u00e4imet laskettiin; punkit tunnistettiin alalahkon tarkkuudella ja hyppyh\u00e4nt\u00e4iset lajilleen mahdollisuuksien mukaan. Tutkimuksessa selvisi, ett\u00e4 maaper\u00e4el\u00e4inyhteis\u00f6t eiv\u00e4t eronneet kantojenkorjuualojen ja laikkum\u00e4t\u00e4stettyjen alojen v\u00e4lill\u00e4, mutta rikottu maa n\u00e4ytti olevan ehj\u00e4\u00e4 maata heikompi elinymp\u00e4rist\u00f6 punkeille ja hyppyh\u00e4nt\u00e4isille viel\u00e4 9 vuotta sen paljastumisesta mineraalimaalle. Koska kantojen korjuu lis\u00e4\u00e4 maanpinnan rikkoutumista, se n\u00e4ytt\u00e4isi olevan hajottajael\u00e4inyhteis\u00f6ille laikkum\u00e4t\u00e4styst\u00e4 voimakkaampi h\u00e4iri\u00f6, vaikka rikotun maan \u00e4nkyrimatopopulaatiot olivatkin toipuneet vuosien aikana. Hajottajael\u00e4inyhteis\u00f6jen tilan pitk\u00e4aikaisseuranta on tarpeen, jotta voidaan arvioida kantojen korjuun vaikutusta hajotustoimintaan, ja tarvittaessa kehitt\u00e4\u00e4 mets\u00e4nuudistustoimia. Aikoinaan tehty avohakkuu n\u00e4kyi uudistusalojen hajottajael\u00e4inyhteis\u00f6iss\u00e4 v\u00e4hentyneen\u00e4 hyppyh\u00e4nt\u00e4isten lajim\u00e4\u00e4r\u00e4n\u00e4, ja syksyn osalta my\u00f6s alentuneena hyppyh\u00e4nt\u00e4isyhteis\u00f6jen monimuotoisuutena. Koska sukkession kulku ei ole t\u00e4ysin ennalta arvattavissa, on huoli monimuotoisuuden v\u00e4henemisest\u00e4 avohakkuun my\u00f6t\u00e4 katoavien vanhojen mets\u00e4habitaattien mukana aiheellinen.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Stump harvesting for energy use is quite a new practice in forest regeneration, the effects of which are not yet fully understood. The aim of this study was to find out 1) whether stump harvesting was a greater disturbance for soil decomposer animals (enchytraeids, mites, collembolans) than mounding, 2) whether there were differences in decomposer communities between the 9 years ago exposed mineral soil and the intact soil, and 3) whether clear-cutting showed any influence on decomposer communities, when about 10 years had passed since the forest regeneration practices. The study area was located in Central Finland and Pirkanmaa, and the study sites were 10 spruce-dominated forests clear-felled in 2005, and 5 old-growth forests at the same area. From the clear-felled study areas, stumps had been collected from 5 of them, and the other 5 were mounded (control). Soil samples for the study were taken in spring and autumn 2014 using soil auger. Enchytraeids were extracted from the samples using a standard wet funnel method and a high-gradient extractor was used for microarthropods. Soil animals were counted; mites were identified to suborder level, and collembolans to species level whenever possible. The study revealed that there were no differences in the studied soil decomposer groups between the stump removal and mounded areas. It was also found out that the almost decade ago exposed mineral soil was still lower quality habitat for mites and collembolans when compared to intact soil. However, enchytraeid populations did not differ between those two surfaces. Because stump harvesting increases the amount of exposed mineral soil, it may be concluded that in general, stump harvesting is a greater disturbance for the decomposer animals when compared to mounding. Therefore, it is necessary to monitor the development of the decomposer communities also in the future, so that we can modify forest regeneration methods if the stump harvesting shows to change decomposition activity. The clear-cutting, which was carried out 9 years ago, was found out to affect collembolan communities. This appeared in decreased numbers of species and in the fall also in lowered diversity of the communities. As the course of the succession is not predictable, we should be concerned about the habitat loss that clear-cutting of old-growth forests causes, and the possible concomitant threat to species diversity.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Kirsi Mensonen (kimamens) on 2015-02-17 15:52:36.058096. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2015-02-17T15:52:36Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201502171335.pdf: 214973 bytes, checksum: 75555be42ed55d4ac011228f1f0faadf (MD5)\r\nlicense.html: 4839 bytes, checksum: 5af4ff205c2e6af54810c3e55a59c38b (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-02-17T15:52:36Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201502171335.pdf: 214973 bytes, checksum: 75555be42ed55d4ac011228f1f0faadf (MD5)\r\nlicense.html: 4839 bytes, checksum: 5af4ff205c2e6af54810c3e55a59c38b (MD5)\r\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (26 sivua)", "language": null, "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": "Hyppyh\u00e4nt\u00e4iset", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "h\u00e4iri\u00f6t", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ilmastonmuutos", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kantojen korjuu", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "punkit", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "uusiutuva energia", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "\u00e4nkyrimadot", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Kantojen korjuu mets\u00e4nuudistamisessa : vaikutus maaper\u00e4n hajottajael\u00e4imist\u00f6\u00f6n", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, 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