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[{"key": "dc.contributor.advisor", "value": "Hiltunen, Minna", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Taipale, Sami", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Honkaranta, Emilia", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Valjakka, Venla", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-05-02T07:29:15Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-05-02T07:29:15Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2020", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/86712", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Muovij\u00e4tteen m\u00e4\u00e4r\u00e4 on noussut yhdeksi maailman suurimmista ymp\u00e4rist\u00f6ongelmista. Muovij\u00e4tteen kasvava m\u00e4\u00e4r\u00e4 ja sen mahdolliset vaikutukset ymp\u00e4rist\u00f6\u00f6n ja ihmiseen ovat globaali ongelma, sill\u00e4 muovia ajautuu kaikkiin faaseihin maapallolla. T\u00e4ss\u00e4 tutkielmassa keskityt\u00e4\u00e4n perinteisen- ja biohajoavan mikromuovin (kooltaan < 10 \u03bcm) vaikutuksiin nielulev\u00e4n ja piilev\u00e4n kasvuun. Tutkielmassa tarkastellaan my\u00f6s luonnonpartikkelin (humus) vaikutusta kasviplanktonin kasvuun. Kasviplankton on merkitt\u00e4v\u00e4 osa ekosysteemej\u00e4, sill\u00e4 se toimii perustuottajana. Aiemmissa tutkimuksissa mikromuovin on todettu alentavan kasviplanktonin kasvua ja haittaavan fotosynteesi\u00e4. Tutkimuslajeiksi valittiin nielulev\u00e4 Cryptomonas erosa ja piilev\u00e4 Stephanodiscus sp. Kasviplankton altistettiin viidelle eri k\u00e4sittelylle: kaksi perinteist\u00e4 muovia (polyvinyylikloridi (PVC) ja polypropeeni (PP)) ja kaksi biomuovia (polylaktidi (PLA) ja biomuovipussi) sek\u00e4 humus. Lis\u00e4ksi kummastakin kasviplanktonlajista \nkasvatettiin kontrollin\u00e4ytteet. Konsentraatioita altistajille oli kolme: 0,1; 1,0 ja 10 mg/l. Kasviplanktonin kasvua mitattiin CASY-solulaskurilla, ja mittauksista laskettiin kasvunopeus ja solum\u00e4\u00e4rien lopputaso. Tutkimuksessa \nilmeni, ett\u00e4 perinteisill\u00e4 mikromuoveilla oli vaikutusta kasviplanktonlajien kasvuun, mutta biomuoveilla ei ollut. Tutkimuksessa todettiin PP:n vaikuttavan molempien kasviplanktonlajien kasvuun positiivisesti, ja PVC:n vaikuttavan piilev\u00e4n kasvuun negatiivisesti. Huomionarvoista oli my\u00f6s, ett\u00e4 humus vaikutti nielulev\u00e4n kasvuun positiivisesti. Kasviplankton saattoi k\u00e4ytt\u00e4\u00e4 mikromuovia kasvualustana ja hy\u00f6ty\u00e4 humuksen tarjoamista ravinteista.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The amount of plastic waste has become one of the biggest environmental problems in the world. The growing amount of plastic waste and its potential effects on the environment and humans is a global problem, as plastic drifts into all phases on Earth. This study focuses on the effects of conventional and biodegradable microplastics (< 10 \u03bcm in size) on the growth of a cryptophyte and a diatom. This study also examines the effect of a natural particle (humus) on phytoplankton\u2019s\ngrowth. Phytoplankton are an important part of ecosystems as they act as primary producers. In previous studies, microplastics have been detected to reduce phytoplankton\u2019s growth and interfere with photosynthesis. Cryptophyte Cryptomonas erosa and diatom Stephanodiscus sp. were selected as study species. They were exposed to five different treatments: two traditional plastics (polyvinyl chloride (PVC) and polypropylene (PP)) and two bioplastics (polylactide (PLA) and bioplastic bag) and humus. In addition, control samples were grown for both phytoplankton species. There were three concentrations for exposers: 0.1, 1.0 and 10 mg/l. Phytoplankton growth was measured with a CASY -cell counter and the measurements were used to calculate the growth rate and the final number of cells at the end of the experiment. The study indicated that traditional microplastics had an effect on the growth of phytoplankton species, but bioplastics did not. The results showed that PP had a positive effect on the growth of both phytoplankton species, and PVC had a negative effect on diatom\u2019s growth. It was also noteworthy that humus had a positive effect on the growth of the cryptophyte. Phytoplankton might have used the microplastics as a substrate and benefit from the nutrients provided by humus.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2023-05-02T07:29:15Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-05-02T07:29:15Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "33", "language": "", "element": "format", "qualifier": "extent", "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": "nielulev\u00e4", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Mikromuovien ja humuspartikkeleiden vaikutus kasviplanktonlajien Cryptomonas erosa ja Stephanodiscus sp. kasvuun", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "bachelor thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202305022807", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Bachelor's thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Kandidaatinty\u00f6", "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_7a1f", "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": "bachelorThesis", "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": "piilev\u00e4t", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "biomuovi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lev\u00e4t", "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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