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dc.contributor.authorHäkkilä, Matti
dc.date.accessioned2018-05-29T06:40:31Z
dc.date.available2018-05-29T06:40:31Z
dc.date.issued2018
dc.identifier.isbn978-951-39-7463-3fi
dc.identifier.isbn978-951-39-7463-3
dc.identifier.otheroai:jykdok.linneanet.fi:1871075
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/58185
dc.description.abstractHuman actions impact biodiversity worldwide. Specialist species are particularly sensitive to environmental degradation whereas generalists may even benefit from habitat changes. As a consequence, specialists are declining while generalists are increasing and, therefore, communities become more similar. This phenomenon is known as biotic homogenization. In boreal forests logging and forest management is the most important factor changing the native habitat. In this thesis I studied if human actions are homogenizing boreal forest bird communities. I further studied if protected areas can maintain their diversity and, thus, prevent homogenization. Through the individual studies, biodiversity was measured using various metrics such as species richness, taxonomic, functional and phylogenetic diversities and Species Specialization Index. My results showed that human actions have diverse impacts on diversity in boreal forests. Intensive forest management has negative impacts on forest bird assemblages, and communities in protected areas are not sheltered from habitat changes in the surrounding areas. These negative impacts are particularly strong on forest specialists. The most important message of this thesis was that to really understand biodiversity, various diversity measures in all spatial scales should be considered. It is worth remembering that in biodiversity more is not necessarily better, but each area and patch has its own natural state of biodiversity. Human-induced changes to this baseline denote unwanted impacts on the communities and the whole ecosystems. With the growing demand and exploitation of natural resources, these complex relations in various scales and especially acknowledging them in conservation set growing demand of co-operation with scientists and conservation planners.fi
dc.format.extent1 verkkoaineisto (50 sivua, 29 sivua useina numerointijaksoina, 62 numeroimatonta sivua) : kuvitettu
dc.language.isoeng
dc.publisherUniversity of Jyväskylä
dc.relation.ispartofseriesJyväskylä studies in biological and environmental science
dc.relation.isversionofJulkaistu myös painettuna.
dc.subject.otherbiodiversity
dc.subject.otherbirds
dc.subject.otherboreal forest
dc.subject.otherconservation
dc.subject.otherenvironmental degradation
dc.subject.otherfunctionality
dc.subject.otherhomogenization
dc.titleBiotic homogenization of forest bird communities under human influence
dc.identifier.urnURN:ISBN:978-951-39-7463-3
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineEkologia ja evoluutiobiologiafi
dc.relation.issn1456-9701
dc.relation.numberinseries348
dc.rights.accesslevelopenAccessfi
dc.subject.ysobiodiversiteetti
dc.subject.ysoeliöyhteisöt
dc.subject.ysohomogeenisuus
dc.subject.ysolinnut
dc.subject.ysometsät
dc.subject.ysoboreaalinen vyöhyke
dc.subject.ysoekologinen tila
dc.subject.ysoluonnonsuojelu
dc.subject.ysometsiensuojelu


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