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[{"key": "dc.contributor.advisor", "value": "H\u00e4m\u00e4l\u00e4inen, Heikki", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "M\u00e4kinen, Lotta", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-06-14T05:07:50Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-06-14T05:07:50Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2022", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/81679", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "J\u00e4rvien rehev\u00f6ityminen muuttaa j\u00e4rviekosysteemi\u00e4 ja vaikuttaa muun muassa syv\u00e4nnepohjael\u00e4inyhteis\u00f6n rakenteeseen. Syv\u00e4nnepohjael\u00e4imet ovat t\u00e4rke\u00e4 osa\nj\u00e4rviekosysteemej\u00e4 tarjoten ravintoa kuluttajille ja osallistuen aineiden kiertoon. Pohjael\u00e4imill\u00e4 on t\u00e4rke\u00e4 rooli my\u00f6s j\u00e4rvien ekologisen tilan arvioinnissa. Pien-Saimaan rehev\u00f6ityminen alkoi 1950-luvulla jatkuen t\u00e4h\u00e4n p\u00e4iv\u00e4\u00e4n saakka, eik\u00e4 lain vaatimaa hyv\u00e4\u00e4 ekologista tilaa ole saavutettu. Yksi vesialueen hoitotoimista on vuonna 2015 k\u00e4ytt\u00f6\u00f6notettu, puhtaampaa vett\u00e4 alueelle johtava Kivisalmen pumppaamo. Hoitotoimen vaikutusta alueen pohjael\u00e4imist\u00f6\u00f6n ja sen tilaan tutkittiin 8 havaintopaikalta vuosina 1999\u20132020 ker\u00e4tyll\u00e4 aineistolla sek\u00e4 yhdelt\u00e4\nhavaintopaikalta otetun paleolimnologisen n\u00e4ytteen perusteella. Lis\u00e4ksi tarkasteltiin vedenlaadun muutoksia tutkimusjaksolla. BACI-tyyppinen tarkastelu pohjael\u00e4imist\u00f6n tilan sek\u00e4 vedenlaatumuuttujien muutoksesta hoitotoimen vaikutuksesta suoritettiin lineaarisella sekamallilla, ja t-testej\u00e4 k\u00e4ytettiin havaintopaikoissa tapahtuneiden muutosten arvioinnissa. Tulosten perusteella pumppaamon l\u00e4hivaikutuspiiriss\u00e4 pohjael\u00e4imist\u00f6 ja erityisesti vedenlaatu antavat viitteit\u00e4 tilan parantumisesta, eik\u00e4 Kivisalmen pumppaamo ainakaan ole huonontanut alueen pohjael\u00e4imist\u00f6n tilaa. On t\u00e4rke\u00e4\u00e4 seurata pohjael\u00e4imist\u00f6n ja yleisemmin tilan kehittymist\u00e4 jatkossakin ja erityisesti, jos alueelle suunnitellut pienemm\u00e4t lis\u00e4pumppaamot toteutuvat.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2022-06-14T05:07:50Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-06-14T05:07:50Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "70", "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": "vesist\u00f6nkunnostus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Hoitotoimena tehdyn lis\u00e4veden johtamisen vaikutus Pien-Saimaan pohjael\u00e4inyhteis\u00f6\u00f6n", "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-202206143288", "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": "Akvaattiset tieteet", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Aquatic sciences", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.collaborator", "value": "business", "language": "", "element": "contractresearch", "qualifier": 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