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[{"key": "dc.contributor.advisor", "value": "Duflot, R\u00e9mi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Eloranta, Antti", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Hankonen, Tuuli", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2024-10-15T06:11:41Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2024-10-15T06:11:41Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2024", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/97399", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Makeiden vesien ekosysteemit kuuluvat maailman uhanalaisimpien elinymp\u00e4rist\u00f6jen joukkoon. Yksi suurista vesist\u00f6jen tilaa heikent\u00e4vist\u00e4 tekij\u00f6ist\u00e4 ovat tierummut ja padot. Ne ovat aiheuttaneet muutoksia virtavesien abioottisissa ja bioottisissa ominaisuuksissa, ja heikent\u00e4neet kytkeytyneisyytt\u00e4, mink\u00e4 vuoksi ne haittaavat akvaattisten lajien liikkumista elinymp\u00e4rist\u00f6jen v\u00e4lill\u00e4. Pro gradu -tutkielman tavoitteena oli arvioida patojen ja tierumpujen vaikutusta kytkeytyneisyyteen Keski-Suomen jokiverkostossa. Toisena tavoitteena oli tunnistaa vaellusesteet, jotka vaikuttavat kytkeytyneisyyteen eniten, koska poistamalla korkeasti priorisoituja esteit\u00e4 jokiverkoston kytkeytyneisyytt\u00e4 voidaan parantaa tehokkaasti. Analyysi suoritettiin aiemmin ker\u00e4ttyyn dataan perustuvilla aluegraafeilla ja niist\u00e4 lasketuilla kytkeytyneisyysindekseill\u00e4. Tulokset osoittavat verkoston kytkeytyneisyyden heikentyneen merkitt\u00e4v\u00e4sti, sill\u00e4 kytkeytyneisyydest\u00e4 on j\u00e4ljell\u00e4 en\u00e4\u00e4 vain noin 34\u201349 %. Patojen kytkeytyneisyytt\u00e4 heikent\u00e4v\u00e4 vaikutus on tierumpujen vaikutusta suurempi. Yksitt\u00e4isen vaellusesteen vaikutus kytkeytyneisyyteen vaihteli esteellisyydest\u00e4 ja sijainnista riippuen. Poistamalla noin kymmenen korkeimmin priorisoitua estett\u00e4, jotka kaikki ovat patoja, jokiverkoston kytkeytyneisyys olisi 63\u201371 %. Tuloksia voidaan k\u00e4ytt\u00e4\u00e4 kytkeytyneisyyden ja sen parantamisen arvioinnissa, mutta kytkeytyneisyysanalyysi yksin ei riit\u00e4 kunnostuksen ja esteiden poiston tehokkaaseen suunnitteluun, vaan analyysin tueksi tarvitaan esimerkiksi potentiaalisilla kunnostuspaikoilla suoritettuja kentt\u00e4tutkimuksia. Kytkeytyneisyysanalyysi kuitenkin tarjoaa p\u00e4\u00e4t\u00f6ksentekoon valintakriteerin, joka huomioi koko jokiverkoston kytkeytyneisyyden sek\u00e4 muiden esteiden sijainnin. Jokien ja purojen tilan heikkeneminen ja niiss\u00e4 esiintyvien lajien uhanalaisuus ovat maailmanlaajuisesti ongelmia, joiden tehokas ratkaiseminen vaatii kunnostustoimenpiteit\u00e4, joihin my\u00f6s kytkeytyneisyyden parantaminen kuuluu.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Freshwater ecosystems are some of the most endangered ecosystems in the world. Among the threats are water management practices and crossing structures, which encompasses culverts and dams. They have caused changes in abiotic and biotic processes of streams and are disrupting connectivity of river networks, which has led to impeded movement of aquatic biota. The first aim of this master\u2019s thesis was to assess how much the connectivity of the river networks in Central Finland has decreased due to culverts and dams. The second aim was to identify, which barriers affect connectivity the most and thus are the most efficient sites for connectivity restoration. The analysis was done by creating landscape graphs using pre-existing data and calculating connectivity metrics from the graphs. The results show that the connectivity of the river networks has decreased markedly as only 34\u201349% of the connectivity is left, and that dams have affected connectivity more than culverts. The barriers have decreased connectivity at varying degrees depending both on the passability and location of the barrier. Removing ca. 10 highest prioritized barriers, all of which are dams, leads to the fastest increase in the overall connectivity of the network and the connectivity of the river networks would increase to 63-71%. The results can be used to assess connectivity, but connectivity analysis should be supplemented with e.g. field studies when planning river restorations and barriers removals. The results provide an important selection criterion for decision-making capable of considering a whole network of rivers and streams, and the barriers in relation to each other. The state of rivers and streams is declining, and the species found in them are becoming endangered globally and their conservation requires restoration actions, including improving connectivity.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2024-10-15T06:11:40Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2024-10-15T06:11:41Z (GMT). No. of bitstreams: 0\n Previous issue date: 2024", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "35", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "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": "connectivity", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kytkeytyneisyys", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "migration barrier", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "tierumpu", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "landscape graph", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "aluegraafi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "virtavesi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Assessing the connectivity of and identifying potential restoration sites in river networks in Central Finland", "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-202410156268", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "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": "Ymp\u00e4rist\u00f6tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Environmental science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "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": null, "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": "40151", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "joet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "padot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "rumpurakenteet (maarakennus)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ekologiset verkostot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "rivers", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "dams", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "culverts", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ecological networks", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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