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[{"key": "dc.contributor.advisor", "value": "Meril\u00e4inen, Jarmo", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Marjom\u00e4ki, Timo", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Tanttu, Heidi", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-03-27T11:34:08Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-03-27T11:34:08Z", "language": null, "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:1468946", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/45565", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kangasalan Vesij\u00e4rvi etel\u00e4isess\u00e4 Suomessa on melko kirkasvetinen ja keskisyvyydelt\u00e4\u00e4n matalahko (6 m) j\u00e4rvi, jossa tilavuudeltaan suuri tuottava kerros aiheuttaa alttiutta rehev\u00f6itymiselle. T\u00e4ss\u00e4 paleolimnologisessa tutkimuksessa tarkasteltiin sedimenttiin kertyneiden surviaiss\u00e4\u00e4ski- ja piilev\u00e4j\u00e4\u00e4nteiden sek\u00e4 sedimenttikerrostumien fysikaalisten ja kemiallisten ominaisuuksien avulla Kangasalan Vesij\u00e4rven ekologisen tilan kehityshistoriaa 1800-luvun lopulta nykyp\u00e4iv\u00e4\u00e4n. Piilev\u00e4yhteis\u00f6 alkoi muuttua 1920-luvun lopulla kohti rehev\u00e4mpi\u00e4 olosuhteita suosivaa lajistoa ja muutokset jatkuivat 1970-luvulle, jonka j\u00e4lkeen yhteis\u00f6n lajikoostumus vakiintui. Surviaiss\u00e4\u00e4skiyhteis\u00f6 alkoi vastaavasti muuttua 1940-luvulla. Samanaikaisesti my\u00f6s sedimentin kemiallisissa ominaisuuksissa tapahtui muutoksia, kuten lyijy- ja rikkipitoisuuden nousu. Piilevien lajidiversiteetti pieneni 1800-luvulta nykyp\u00e4iv\u00e4\u00e4 kohti. Piileviin perustuvan siirtofunktion (DI\u2013TP) avulla arvioitu kokonaisfosforipitoisuus kohosi tutkimusjakson aikana jopa 70 %. Euroopan unionin vesipuitedirektiivin vaatimusten mukaisesti tarkasteltuna syv\u00e4nteen surviaiss\u00e4\u00e4skien avulla arvioitu j\u00e4rven ekologinen tila oli viel\u00e4 1800-luvun lopulla ja 1900-luvun alussa erinomainen. 1930-luvulta noin vuoteen 1970 j\u00e4rven tila oli aiempaa heikompi, mutta voitiin kuitenkin luokitella hyv\u00e4ksi. 1970-luvulla tila kohentui ja viime vuosituhannen vaihteessa heikentyi uudelleen. Vaikutusta j\u00e4rven tilan muutoksiin on p\u00e4\u00e4asiallisesti ollut maatalouden tehostumisella ja j\u00e4tevesill\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Lake Vesij\u00e4rvi in Kangasala, southern Finland, is a quite shallow (mean depth 6 m) clear-water lake. Large volume of the euphotic layer exposes this lake to eutrophication. The aim of this paleolimnological study was to examine the environmental history of Lake Vesij\u00e4rvi from the late 19th century to the recent years using subfossil diatom and chironomid analysis and examining physical and chemical properties of the sediment. Diatom assemblages began to change towards more eutraphentic species composition in the late 1920s and the change continued until the 1970s, after which the diatom community stabilized. In chironomid assemblages the corresponding changes occurred in the 1940s. Contemporary changes were found from the chemical properties of the sediment, such as an increase in lead and sulphur concentrations. The species diversity of diatom assemblages decreased towards the recent years, and the total phosphorus concentration inferred from the diatom based transfer function (DI\u2013TP) increased by 70 % during the study period. According to classification based on the Water Framework Directive of the European Union the profundal chironomid assemblages indicated excellent ecological status in the end of the 19th century and the beginning of the 20th century. From the 1930s until the year 1970 there was a period when the status of the lake was lower than earlier, but was still classified good. In the 1970s, the status improved, but deteriorated again during the past decade. The observed changes in the ecological status of the lake were mainly affected by waste water discharge and modernization of agriculture.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Heidi Tanttu (hejotant) on 2015-03-27 11:34:05.277946. 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 2015-03-27T11:34:08Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201503271515.pdf: 968214 bytes, checksum: 2003bb45b0c1c1b3ce40bae0b3b8067f (MD5)\nlicense.html: 4858 bytes, checksum: a7de20c5542c884774d8b176078d74e4 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-03-27T11:34:08Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201503271515.pdf: 968214 bytes, checksum: 2003bb45b0c1c1b3ce40bae0b3b8067f (MD5)\nlicense.html: 4858 bytes, checksum: a7de20c5542c884774d8b176078d74e4 (MD5)\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (37 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": "DI\u2013TP", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ekologinen laatusuhde", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "j\u00e4rvisedimentti", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "piilev\u00e4", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "surviaiss\u00e4\u00e4ski", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Kangasalan Vesij\u00e4rven ekologisen tilan kehitys 1800-luvulta nykyp\u00e4iv\u00e4\u00e4n : paleolimnologinen tutkimus", "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-201503271515", "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": "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": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "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": "dc.date.updated", "value": "2015-03-27T11:34:09Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "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": "fi", "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": "4012", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "piilev\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "surviaiss\u00e4\u00e4sket", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ekologinen tila", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "sedimentit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "Vesij\u00e4rvi", "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.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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