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[{"key": "dc.contributor.advisor", "value": "Haimi, Jari", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Maczulskij, Kaisamari", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2017-09-08T13:15:23Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2017-09-08T13:15:23Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2017", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1722063", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/55295", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Viime vuosina kantojen korjuu energiapuuksi on lis\u00e4\u00e4ntynyt, mik\u00e4 v\u00e4hent\u00e4\u00e4 eli\u00f6st\u00f6n monimuotoisuutta hakkuualoilla. Hakkuuaukoille j\u00e4tetyt kannot tarjoavat resursseja esimerkiksi kaarnakuoriaisille, jotka ovat nilaa sy\u00f6vi\u00e4 kovakuoriaisia. Kaarnakuoriaiset toimivat t\u00e4rkein\u00e4 lahottajina aloittaen lahotusprosessin, mutta toisaalta ne aiheuttavat my\u00f6s taloudellisia tappioita vahingoittaessaan mets\u00e4teollisuudessa k\u00e4ytett\u00e4v\u00e4\u00e4 puuta. Kantojen j\u00e4tt\u00e4minen hakkuuaukolle voi her\u00e4tt\u00e4\u00e4 taloudellisesta n\u00e4k\u00f6kulmasta huolen, ett\u00e4 kaarnakuoriaiset lis\u00e4\u00e4ntyv\u00e4t kantojen my\u00f6t\u00e4 my\u00f6s terveess\u00e4 pystymets\u00e4ss\u00e4. Tutkimuksessa tavoitteena oli selvitt\u00e4\u00e4, houkuttelevatko kannot kaarnakuoriaisia ja vaikuttaako kantojen sijainti hakkuuaukossa houkuttelevuuteen. Tutkimusaloina oli kaksi kahden hehtaarin kokoista kuusikon p\u00e4\u00e4tehakkuualaa Jyv\u00e4skyl\u00e4ss\u00e4. Aloille asetettiin yhteens\u00e4 24 ristikkoikkunapyydyst\u00e4 touko-kes\u00e4kuuksi 2017. Toistoja oli nelj\u00e4 ja kuhunkin toistoon asetettiin kuusi pyydyst\u00e4. Pyydykset asetettiin 20 m ja 50 m et\u00e4isyydelle hakkuualojen reunasta ja kummallekin et\u00e4isyydelle laitettiin pyydykset kannoille, hakkuut\u00e4hdekasoille ja avomaalle. Pyydyksill\u00e4 saatiin yhteens\u00e4 3641 kaarnakuoriaista, jotka m\u00e4\u00e4ritettiin lajitasolle. Pyydyksen et\u00e4isyyden ja sijainnin vaikutusta kokonaisyksil\u00f6m\u00e4\u00e4r\u00e4\u00e4n, lajim\u00e4\u00e4r\u00e4\u00e4n sek\u00e4 runsaimpien lajien yksil\u00f6m\u00e4\u00e4riin testattiin keskiarvotesteill\u00e4. Et\u00e4isyydell\u00e4 hakkuualan reunasta ei todettu olevan vaikutusta kaarnakuoriaisten kokonaisyksil\u00f6m\u00e4\u00e4r\u00e4\u00e4n, mutta kannoilla oleviin pyydyksiin yksil\u00f6it\u00e4 tuli muita pyydyksi\u00e4 enemm\u00e4n. Kuusent\u00e4htikirjaajia oli enemm\u00e4n l\u00e4hell\u00e4 hakkuuaukon reunaa kuin hakkuuaukon keskell\u00e4 ja kulokaarnakuoriaisia oli enemm\u00e4n keskell\u00e4. Usealla lajilla kannoilla olleissa pyydyksiss\u00e4 yksil\u00f6it\u00e4 oli enemm\u00e4n kuin muissa kohteissa olleissa pyydyksiss\u00e4. Tulosten perusteella kantojen korjaamista ja j\u00e4tt\u00e4mist\u00e4 hakkuuaukolle voidaan pohtia monimuotoisuuden ja taloudellisen n\u00e4k\u00f6kulman kannalta. Perusteltua olisi j\u00e4tt\u00e4\u00e4 kantoja hakkuuaukon eri osiin, sill\u00e4 kaarnakuoriaisten m\u00e4\u00e4r\u00e4 ei vaihtele eri et\u00e4isyyksill\u00e4. N\u00e4in pystymets\u00e4n l\u00e4hell\u00e4 kuoriaisia ei ole enemm\u00e4n eik\u00e4 riski terveisiin puihin iskeytymisest\u00e4 kasva. Lis\u00e4tutkimus hakkuuaukon eri osien houkuttelevuudesta sek\u00e4 kantojen j\u00e4tt\u00e4misen vaikutuksista terveen mets\u00e4n tuhoihin on kuitenkin tarpeen.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Stump harvesting has become more common in the past couple of years. Stumps form a resource for many organisms, so extraction decreases local biodiversity. For example bark beetles (Curculionidae: Scolytinae) use stumps as a breeding material. Bark beetles eat phloem, live in injured trees and are important organisms to start decomposition processes. On the other hand bark beetles cause economical loss by injuring timber. Leaving stumps to the clear-cut is important to biodiversity but can cause a concern about bark beetles to use healthy trees as a breeding material. The aim of this study was to find out whether stumps and their distance from forest edge impact the abundance of bark beetles. The number of bark beetles was studied in two Norway spruce dominated clear-cuts of two hectares in Jyv\u00e4skyl\u00e4, Central-Finland. Bark beetles were collected with window-traps from the end of April to beginning of July 2017. There were all together 24 traps in four replications. Traps were placed in two different distances, 20 m and 50 m from the forest edge. In both distances, there was a trap in three different locations: stump, pile of harvesting residues and open land. In total, 3641 bark beetles were caught and identified. Effects of location and distance to the numbers of beetles, number of species and amount of beetles in different species were tested. Distance did not affect the abundance of bark beetles. There were more bark beetles in the traps on stumps than in the other traps. In addition, many of the species were more numerous on stumps. Distances from the forest edge differed in two species Pityogenes chalcographus and Orthotomicus suturalis. There were more Pityogenes chalcographus in the traps near the edge of the clear cut than in the traps center of the clear-cut. Orthotomicus suturalis was more common in traps in the center of the clear-cut than near the edge. Decisions about stump extraction can be discussed based on these results. According to these results, it is safe for the standing forest to leave stumps in any part of the clear-cuts. The distance doesn\u2019t effect to the number of bark beetles, so stumps may not increase the amount of bark beetles in standing trees. Further studies about the effects of different parts of clear-cuts to amount of bark beetles are needed. It is also important to study whether stumps effect to the bark beetle abundance in healthy standing forests.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Kaisamari Maczulskij (kaielila) on 2017-09-08 13:15:22.887024. 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.group@korppi.jyu.fi) on 2017-09-08T13:15:23Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201709083688.pdf: 1153726 bytes, checksum: f1b14c5369cd4b715971289bfb020b31 (MD5)\r\nlicense.html: 4862 bytes, checksum: 4bf46ff12dd34c8389168b737435e7c1 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2017-09-08T13:15:23Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201709083688.pdf: 1153726 bytes, checksum: f1b14c5369cd4b715971289bfb020b31 (MD5)\r\nlicense.html: 4862 bytes, checksum: 4bf46ff12dd34c8389168b737435e7c1 (MD5)\r\n Previous issue date: 2017", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (21 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": "bark beetles", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "logging", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Kantojen ja mets\u00e4nreunan et\u00e4isyyden vaikutus kaarnakuoriaisten jakautumiseen hakkuuaukoissa", "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-201709083688", "language": null, "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": 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