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[{"key": "dc.contributor.author", "value": "Aarva, Maija", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2011-06-29T07:57:24Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2011-06-29T07:57:24Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2011", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1163890", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/27244", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Rahkasammalet (Sphagnum spp.) ovat pohjoisten soiden valtalajeja, joiden rakenne ja toiminta vaikuttavat suoekosysteemin sukkessioon. Turpeenmuodostuksen ansiosta pohjoisten seutujen rahkasammalvaltaisten soiden merkitys on suuri my\u00f6s maailmanlaajuisessa hiilen kierrossa. Sammalten yll\u00e4pit\u00e4mien kosteiden olojen ansiosta soilla el\u00e4\u00e4 monimuotoinen aineiden kiertoon osallistuva mikrobiyhteis\u00f6. Rahkasammalissa el\u00e4v\u00e4t metanotrofit tarjoavat rahkasammalille hiilen l\u00e4hteen metaaninhapetuksessa (CH4) syntyv\u00e4st\u00e4 hiilidioksidista. Metaaninhapetuksen lis\u00e4ksi metanotrofit voivat sitoa typpe\u00e4. Soilla el\u00e4\u00e4 my\u00f6s muita bakteereja, joilla on edellytykset typensidontaan. Rahkasammalet voivat tarjota my\u00f6s n\u00e4ille typensitojille mikrohabitaatin. Sukkession edetess\u00e4 turpeeseen kertyy hiilen lis\u00e4ksi kasvien kasvuun tarvitsemaa typpe\u00e4. Turvekerros erist\u00e4\u00e4 sukkession aikana suon pinnan mineraalimaasta, eiv\u00e4tk\u00e4 kasvit saa typpe\u00e4 kuin laskeumana. Tutkimuksemme tavoitteena olikin selvitt\u00e4\u00e4 rahkasammalten merkityst\u00e4 biologisessa ilmakeh\u00e4n typensidonnassa (N2). Tutkimme my\u00f6s typensidonnan ja siihen osallistuvan mikrobiyhteis\u00f6n muutosta sukkession edetess\u00e4 sek\u00e4 metaaninhapetuksen ja typensidonnan v\u00e4list\u00e4 yhteytt\u00e4. Tutkimus tehtiin Pohjanlahden maankohoamisrannikolla kehittyneell\u00e4 luonnontilaisella suoekosysteemien aikasarjalla. Typensidonnan ja metaaninhapetuksen selvitt\u00e4misess\u00e4 k\u00e4ytettiin vakaisiin isotooppeihin perustuvaa menetelm\u00e4\u00e4, jossa rahkasammalia inkuboitiin leimattuja 15N2 - ja 13CH4 -kaasuja sis\u00e4lt\u00e4viss\u00e4 lasipulloissa 2 vrk in situ. Typensidontaan mahdollisesti osallistuvien mikrobiryhmien selvitt\u00e4miseksi k\u00e4sittelyt toistettiin valossa ja pime\u00e4ss\u00e4. Tulosten perusteella sukkessiovaiheet eiv\u00e4t eronneet toisistaan typensidonnassa. Typensidonta oli kuitenkin suurinta mesotrofisella sarasuolla S. platyphyllum -n\u00e4ytteiss\u00e4, 2,7 \u03bcmol N g-1 sammalbiomassaa d-1. Typensidontaan osallistuivat mahdollisesti sinibakteerit, metanotrofit ja muut heterotrofiset bakteerit. Metaaninhapetuksen ja typensidonnan v\u00e4lill\u00e4 havaittiin yhteys, mik\u00e4 vahvistaa metanotrofien sitovan my\u00f6s typpe\u00e4. Ymp\u00e4rist\u00f6tekij\u00f6ist\u00e4 vedenpinnan taso vaikutti typensidontaan ja metaaninhapetukseen. Metaaninhapetukseen vaikutti lis\u00e4ksi suoveden pH ja metaanipitoisuus. Lis\u00e4\u00e4 tutkimusta tarvitaan, jotta voidaan selitt\u00e4\u00e4 tarkemmin typensitojien aktiivisuuden vaihtelua sukkessiojatkumolla. Typensidonnan ja metaaninhapetuksen v\u00e4lisen yhteyden merkitys maailmanlaajuisessa hiilenkierrossa vaatii my\u00f6s lis\u00e4\u00e4 perehtymist\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Maija Aarva (maliaarv) on 2011-06-29 07:57:22.961587. Form: Pro gradu -lomake (1 tekij\u00e4) (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake-1-tekijae). JyX data:", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2011-06-29T07:57:24Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-2011062911088.pdf: 657346 bytes, checksum: db05ce67930bc875a66df448053fda31 (MD5)\nlicense.html: 5033 bytes, checksum: 324afa9c718f88095b48da071ada2ad5 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2011-06-29T07:57:24Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-2011062911088.pdf: 657346 bytes, checksum: db05ce67930bc875a66df448053fda31 (MD5)\nlicense.html: 5033 bytes, checksum: 324afa9c718f88095b48da071ada2ad5 (MD5)\n Previous issue date: 2011", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "40 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": "metanotrofit", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "prim\u00e4\u00e4risukkessio", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "rahkasammalet", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "suo", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "typensidonta", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "typensitojamikrobit", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Typensidonta ja siihen osallistuva mikrobiyhteis\u00f6 soiden prim\u00e4\u00e4risukkessiojatkumon rahkasammalissa", "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", 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