| fullrecord |
[{"key": "dc.contributor.advisor", "value": "H\u00e4m\u00e4l\u00e4inen, Heikki", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Teppo, Anssi", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Koivunen, Jonna", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-04-10T04:42:24Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-04-10T04:42:24Z", "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:1472040", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/45614", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Valuma-alueen maank\u00e4ytt\u00f6 ja muu ihmistoiminta ovat muuttaneet virtavesien tilaa monin paikoin hyvin merkitt\u00e4v\u00e4sti. Suomen vesienhoitolain tavoite on, ett\u00e4 vesien tila on v\u00e4hint\u00e4\u00e4n hyv\u00e4 vuoteen 2015 menness\u00e4. Vesienhoitoasetuksen mukaan pintavesien tilaa tulee arvioida ensisijaisesti vesieli\u00f6st\u00f6n (kalojen, pohjael\u00e4inten, levien ja vesikasvien) avulla, fysikaalisen ja kemiallisen seurannan ollessa n\u00e4iden tukena. Virtavesien tilan arvioinnissa er\u00e4\u00e4n\u00e4 biologisena tekij\u00e4n\u00e4 k\u00e4ytet\u00e4\u00e4n koskipaikkojen pohjael\u00e4inyhteis\u00f6j\u00e4. Etenkin pienempien virtavesien pohjael\u00e4imist\u00f6n tilaan vaikuttavista tekij\u00f6ist\u00e4 on vain v\u00e4h\u00e4n tietoa saatavilla. On t\u00e4rke\u00e4\u00e4 tunnistaa n\u00e4m\u00e4 tekij\u00e4t ja niiden osalta taso, joka vaarantaa hyv\u00e4n tilan saavuttamisen. T\u00e4ll\u00f6in pystyt\u00e4\u00e4n paremmin tunnistamaan kohteet, joissa hyv\u00e4n tilan edellytykset eiv\u00e4t ehk\u00e4 t\u00e4yty ja jotka siksi vaativat seurantaa. Lis\u00e4ksi pystyt\u00e4\u00e4n l\u00f6yt\u00e4m\u00e4\u00e4n t\u00e4rkeimm\u00e4t tarvittavat hoitotoimenpiteet hyv\u00e4n tilan saavuttamiseksi. T\u00e4ss\u00e4 tutkimuksessa arvioitiin 32 L\u00e4nsi-Suomen alueen kosken pohjael\u00e4imist\u00f6n tila osana ekologista tilaa sek\u00e4 selvitettiin, miten eri maank\u00e4ytt\u00f6muodot ja muu ihmistoiminta siihen vaikuttavat. Erityisen\u00e4 tavoitteena oli arvioida keskeisille ymp\u00e4rist\u00f6paineille pohjael\u00e4imist\u00f6n hyv\u00e4n tilan vaarantava kriittinen taso. Suurimmassa osassa tutkimuskoskia pohjael\u00e4imist\u00f6n tila oli erinomainen tai hyv\u00e4, mutta kuuden kosken tila oli hyv\u00e4\u00e4 heikompi. Tulosten perusteella pohjael\u00e4imist\u00f6n ja sit\u00e4 kautta ehk\u00e4 koko virtaveden hyv\u00e4n tilan saavuttaminen vaarantuu maatalousalueosuuden ollessa yli 10 % valuma-alueen pinta-alasta. Tutkimuskoskien pohjael\u00e4imist\u00f6n tilaa heikensi veden typpi-, fosfori-, kiintoaine- ja alumiinipitoisuuden sek\u00e4 sameuden, johtokyvyn ja happamuuden kasvu. Useiden vedenlaatumuuttujien, kuten typen ja fosforin, pitoisuudet kasvoivat valuma-alueen maatalousalueosuuden kasvaessa, kun taas veden alumiinipitoisuuden tai happamuuden kasvu ei ollut yhteydess\u00e4 valuma-alueen maanviljelyyn. Valuma-alueen koolla, uoman perkauksella, virtaveden l\u00e4ht\u00f6pisteell\u00e4, s\u00e4\u00e4nn\u00f6stelyll\u00e4, ojituksen m\u00e4\u00e4r\u00e4ll\u00e4, kosken varjostuksella tai vesisammaleiden peitt\u00e4vyydell\u00e4 ei juuri havaittu olevan yhteytt\u00e4 pohjael\u00e4imist\u00f6n tilaan. N\u00e4iden muuttujien mittaaminen ei ole yht\u00e4 yksiselitteist\u00e4 kuin vedenlaadun, sill\u00e4 esimerkiksi perkauksen voimakkuutta tai siit\u00e4 kulunutta aikaa ei voitu mitata t\u00e4m\u00e4n tutkimuksen yhteydess\u00e4. Eri tekij\u00f6iden vaikutuksia pohjael\u00e4imist\u00f6\u00f6n ei ole helppoa erottaa toisistaan, koska pohjael\u00e4imist\u00f6ss\u00e4 esiintyy sek\u00e4 luonnollista ett\u00e4 ihmistoiminnasta johtuvaa vaihtelua. Seurantaa tulisi kohdistaa erityisesti tutkimuskoskiin, joissa pohjael\u00e4imist\u00f6n tila oli hyv\u00e4\u00e4 heikompi sek\u00e4 muihin koskiin, joissa hyv\u00e4n tilan tavoittaminen on vaarantunut maatalousalueosuuden tai vedenlaatutekij\u00f6iden vuoksi.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Land use in the catchment area and other human activities have widely changed the condition of running waters. The objective of the Finnish Act on Water Resources Management is to achieve at least a good status of freshwaters by 2015. According to the Decree on Water Resources Management the assessment of the condition of surface waters shall primarily be based on aquatic organisms supported by physical and chemical monitoring. One of the biological quality elements used for running waters is benthic macroinvertebrate communities in rapids. There is only little information available on the factors influencing the status of macroinvertebrate communities especially in smaller running waters. It is important to recognise these factors and the level at which the good status is endangered, thereby being able to recognise the sites where the good status may not be met and further monitoring is required. In addition, it will be possible to determine the most important management actions for achieving the good status. In this study the status of macroinvertebrate communities in 32 rapids of Western Finland were assessed as a part of the ecological status of the rapids, as well as the influences of different forms of land use and other human activities. Of special interest was assessing the critical level of key environmental pressures, which endanger the achievement of a good status. In most of the rapids studied the status of macroinvertebrate communities was high or good, although the status of six rapids was worse than good. Based on the results, achieving the good status for macroinvertabrate community and possibly for running waters as a whole, is endangered when cultivated area is more than 10 % of the catchment area. Several water quality parameters correlated with the percentage of agricultural land. Size of the catchment area, channel modifications, starting point of running water, regulation of water level, number of ditches, riparian shading or coverage of bryophytes correlated weakly if at all with the status of macroinvertebrate community. However, the effects of these variables cannot be completely ruled out as for example the magnitude of channel modification or the time passed after modification could not be measured in this study. It is not easy to distinguish the effects of different factors on macroinvertabrate community from each other or between natural and human factors. Further monitoring should be focused to study rapids where the status of the community was worse than good and to streams where the good status has been endangered by the extensive agriculture in the catchment area or by water quality decreased beyond the risk levels.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Jonna Koivunen (johakoiv) on 2015-04-10 04:42:23.666322. 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 2015-04-10T04:42:24Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201504101560.pdf: 1604482 bytes, checksum: cc6e0cc73444c3320faf91cad5ebea56 (MD5)\nlicense.html: 4860 bytes, checksum: 8b2b8b8e524dd533403d7b07e4cd5d19 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-04-10T04:42:24Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201504101560.pdf: 1604482 bytes, checksum: cc6e0cc73444c3320faf91cad5ebea56 (MD5)\nlicense.html: 4860 bytes, checksum: 8b2b8b8e524dd533403d7b07e4cd5d19 (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": "maank\u00e4ytt\u00f6", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "pohjael\u00e4imist\u00f6", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ekologinen tila", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Maank\u00e4yt\u00f6n ja muun ihmistoiminnan vaikutukset L\u00e4nsi-Suomen pienvirtavesien pohjael\u00e4imist\u00f6n tilaan", "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-201504101560", "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": "2015-04-10T04:42:25Z", "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": "maank\u00e4ytt\u00f6", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "pohjael\u00e4imist\u00f6", "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": "virtavedet", "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"}]
|