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[{"key": "dc.contributor.advisor", "value": "H\u00e4m\u00e4l\u00e4inen, Heikki", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Halme, Panu", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Salmela, Jukka", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Ahola, Janika", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2021-05-28T09:45:09Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2021-05-28T09:45:09Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2021", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/76025", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Vesihy\u00f6nteisill\u00e4 on merkitt\u00e4v\u00e4 rooli makeiden vesien ravintoverkossa, koska ne kattavat suuren osan vesien selk\u00e4rangattomista. Era\u0308s vesihyo\u0308nteisheimo on sulkahyttyset, joiden toukat ovat vesist\u00f6iss\u00e4 t\u00e4rkeit\u00e4 petoja seka\u0308 saaliita kaloille. Sulkahyttyset voidaan karkeasti jakaa j\u00e4rvi- ja lampilajeihin niiden elinymp\u00e4rist\u00f6n perusteella. T\u00e4h\u00e4n menness\u00e4 lauhkean vy\u00f6hykkeen tutkimuksissa on keskitytty j\u00e4rvilajeihin. Lampilajit, jotka el\u00e4v\u00e4t kalattomissa vesiss\u00e4 ovat huonommin tunnettuja. Suomesta on esimerkiksi hiljattain l\u00f6ydetty kaksi uutta lajia, joista toinen kuvattiin tieteelle uutena. Tutkimuksessa selvitettiin 1) Hossan alueen sulkahyttyslajistoa sek\u00e4 2) onko sulkahyttysten lajim\u00e4\u00e4r\u00e4 ja runsaus yhteydess\u00e4 ymp\u00e4rist\u00f6tekij\u00f6ihin kalattomissa lammissa. Tutkimusalueelta valittiin 20 kalatonta lampea, joista ker\u00e4ttiin sulkahyttysten toukkia sek\u00e4 mitattiin ymp\u00e4rist\u00f6muuttujia alku- ja loppukes\u00e4ll\u00e4. Alueelta l\u00f6ytyi kahdeksan lajia (73 % Suomen lajeista) kaikista kolmesta Suomessa tavattavasta suvusta. Runsaslukuisena esiintyiv\u00e4t Chaoborus-suvun lajit ja harvalukuisena Mochlonyx ja Cryophila -sukujen lajit. Sulkahyttysten lajim\u00e4\u00e4r\u00e4 vaihteli lammessa 0\u20133 v\u00e4lill\u00e4 ja runsaus 0\u2013450 yks/m3. Lajim\u00e4\u00e4r\u00e4 ja runsaus olivat heikosti yhteydess\u00e4 suureen osaan ymp\u00e4rist\u00f6muuttujista. Tutkimuksen perusteella Hossan alueella el\u00e4\u00e4 monimuotoinen sulkahyttyslajisto, ja usean lajin alueelliset levinneisyystiedot tarkentuivat. Sulkahyttyset n\u00e4ytt\u00e4isiv\u00e4t siet\u00e4v\u00e4n monenlaisia olosuhteita, vaikka eri lajit saattavat el\u00e4\u00e4 hieman erilaisessa elinymp\u00e4rist\u00f6ss\u00e4. Tutkimuksen tieto on pohjana lajiston seurannalle ja uhanalaisuuden arvioinnille.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Aquatic insects dominate invertebrate fauna in most freshwater ecosystems. Chaoboridae, commonly known as phantom midges, are an aquatic insect family. The larvae are common planktonic predators and prey to planktivorous fish. Chaoboridae can be divided into lake-dwelling and pond-dwelling species. The studies made in the boreal zone have focused on lake species so far. In contrast, the species that live in fishless ponds are less known. The same applies to Finland, where two new species have recently been found. The aim was to study 1) Chaoboridae fauna in the Hossa area and 2) which environmental factors correlate with the species richness and abundance of Chaoboridae in boreal fishless ponds. From the study area located in Hossa, 20 fishless ponds were selected. Larvae of Chaoboridae were collected and environmental variables were measured early and late summer. Eight species (73 % of Finland\u2019s species) were found from three genera. Chaoborus appeared to be abundant, and Mochlonyx and Cryophila in small numbers. The number of Chaoboridae in the pond varied from 0 to 3 and the abundance between 0 and 450 individuals m3. Species richness and abundance were weakly correlated to the many environmental variables. As conclusion, the Hossa area have diverse Chaoboridae fauna, and regional distribution data for several species were refined. Chaoboridae appear to withstand a wide range of conditions, although the species may live in slightly different habitats. The acquired knowledge is the basis for species monitoring and endangerment assessment.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2021-05-28T09:45:09Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2021-05-28T09:45:09Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "46", "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": "vesihy\u00f6nteiset", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Hossan kalattomien lampien sulkahyttyslajisto ja lajien esiintymisen yhteys ymp\u00e4rist\u00f6tekij\u00f6ihin", "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-202105283270", "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", 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