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[{"key": "dc.contributor.advisor", "value": "Kuparinen, Anna", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Ahti, Pauliina", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Per\u00e4l\u00e4, Tommi", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Pesari, Susanna", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-11-16T10:19:32Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-11-16T10:19:32Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2022", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/83938", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kelppilev\u00e4mets\u00e4t ovat eritt\u00e4in monimuotoisia kylmien rannikkovesien ekosysteemej\u00e4. Kelppilev\u00e4mets\u00e4t tarjoavat monia ekosysteemipalveluita: ne esimerkiksi suojaavat rantoja eroosiolta, ovat t\u00e4rkeit\u00e4 perustuotannossa ja luovat elinymp\u00e4rist\u00f6n monille muille lajeille. Kelppilevien kolmiulotteinen rakenne tarjoaa suojaa kelppilev\u00e4metsiss\u00e4 el\u00e4ville lajeille ja auttaa niiden selviytymisess\u00e4. Kelppilev\u00e4\u00e4 on ker\u00e4tty mekaanisesti jo yli viidenkymmenen vuoden ajan ja keruu tehd\u00e4\u00e4n usein viiden vuoden jaksoissa. Aiemmat tutkimukset kelppilev\u00e4n keruusta ovat osoittaneet, ett\u00e4 kelppilev\u00e4biomassa palautuu nelj\u00e4ss\u00e4 vuodessa, mutta keruun vaikutuksia kelppilev\u00e4mets\u00e4n ekosysteemiin on tutkittu v\u00e4hemm\u00e4n. Turska (Gadus morhua) ja hummeri (Homarus gammarus) ovat kaupallisesti t\u00e4rkeit\u00e4 lajeja, jotka k\u00e4ytt\u00e4v\u00e4t kelppilev\u00e4metsi\u00e4 elinymp\u00e4rist\u00f6n\u00e4. Aiemmat tutkimukset ovat osoittaneet, ett\u00e4 elinymp\u00e4rist\u00f6n moniulotteisuus voi parantaa nuorten kalojen selviytymist\u00e4. T\u00e4ss\u00e4 tutkimuksessa parametrisoimme allometrisen ekosysteemimallin Koillis-Atlantin kelppilev\u00e4mets\u00e4lle ja tutkimme ei-trofista vuorovaikutusta kelppilev\u00e4n ja turskan sek\u00e4 kelppilev\u00e4n ja hummerin v\u00e4lill\u00e4. Kelppilev\u00e4n keruuta simuloitiin mallissa 1-, 4- tai 8-vuoden v\u00e4lein siten, ett\u00e4 kelppilev\u00e4biomassaa poistettiin kasvukauden lopussa 20 tai 80 prosenttia kelpin kokonaisbiomassasta. Havaitsimme, ett\u00e4 kelppilev\u00e4biomassa palautui, kun palautumisaika oli nelj\u00e4 tai kahdeksan vuotta, mutta kelppilev\u00e4biomassa ei palautunut, kun keruu tapahtui joka vuosi. Kelpinsy\u00f6jien biomassojen muutokset olivat lajikohtaisia. Osa lajien biomassoista v\u00e4heni, osa palautui ja osa kasvoi. 0- ja 4+-vuotiaan turskan sek\u00e4 hummerin biomassat v\u00e4heniv\u00e4t, kun palautumisaika oli yksi tai nelj\u00e4 vuotta, ja muutos oli suurin, kun kelppi\u00e4 poistettiin 80% kelpin kokonaisbiomassasta. Kelpin ja turskan sek\u00e4 kelpin ja hummerin v\u00e4linen ei-trofinen vuorovaikutus aiheutti turskan ja hummerin biomassojen heilahtelua sek\u00e4 voimisti kelpin keruun vaikutusta lajeihin. Tulokset osoittavat, ett\u00e4 kelppilevien keruulla voi olla vaikutuksia muihin ekosysteemin lajeihin elinymp\u00e4rist\u00f6n menetyksen ja ravintoverkon dynamiikan muutosten kautta.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Kelp forests are highly diverse and productive ecosystems in cold, coastal waters around the world. Kelp forests are important for primary production, coastline protection and providing habitat for many species. The three-dimensional structure of kelp can provide shelter and help the survival of other species living in kelp forests. Kelp has been mechanically harvested for over 50 years with a 5-year harvesting cycle. Previous studies on kelp harvesting show kelp recovery in four years after harvesting, but the recovery of other species inhabiting kelp forests is poorly understood. The Atlantic cod (Gadus morhua) and the European lobster (Homarus gammarus) are commercially important species that use kelp forests as a habitat. Previous studies have shown that habitat complexity can enhance juvenile fish survival. In the present study we parametrized an allometric trophic network (ATN) model for a northeast Atlantic kelp forest and designed a non-trophic interaction between kelp and juvenile Atlantic cod, and kelp and European lobster. Kelp harvesting was simulated by removing 20% or 80% of kelp biomass at the end of the growth season, and the harvesting events were carried out at 1-, 4-, or 8-year intervals through the harvesting period of 50 years. The biomass changes of kelp, kelp consumers, and the Atlantic cod and the European lobster were explored. We found that kelp biomass recovered with harvesting intervals of 4 and 8 years when 20% or 80% of kelp was removed, but kelp biomass did not recover with either harvesting intensity when kelp was harvested every year. The biomasses of kelp consumers declined, recovered, or increased during the harvesting period, depending on the species. The biomasses of the Atlantic cod age groups 0 and 4+ and the biomass of the European lobster declined with harvesting intervals of 1 and 4 years, and the decline was largest when harvesting intensity was 80%. The non-trophic interaction of kelp cover added to the Atlantic cod and to the European lobster increased the oscillations of the biomasses and the effect of the kelp harvesting on Atlantic cod and European lobster. These results show that the effect of kelp harvesting can impact the wider ecosystem through declining biomass and population fluctuations and indicate that the recovery of kelp associated species may not follow the recovery of kelp.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2022-11-16T10:19:32Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-11-16T10:19:32Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "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": "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": "allometric trophic network model", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "ecosystem-modelling", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "habitat complexity", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Laminaria", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "non-trophic interaction", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "The ecosystem effects of kelp harvesting in the northeast Atlantic", "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-202211165233", "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", "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": "Ekologia ja evoluutiobiologia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ecology and evolutionary biology", "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": "4011", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ravintoverkot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ekosysteemit (ekologia)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "meribiologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ekologia", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "food webs", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ecosystems (ecology)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "marine biology", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ecology", "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"}]
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