Sökning: "Biologisk mångfald"

Visar resultat 1 - 5 av 43 avhandlingar innehållade orden Biologisk mångfald.

  1. 1. Breaking the ice : effects of ice formation and winter floods on vegetation along streams

    Författare :Lovisa Lind; Christer Nilsson; Christine Weber; Michael Scott; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; anchor ice; climate change; in-stream; riparian; river ice; streams; vegetation;

    Sammanfattning : Streams in cold regions are characterized by unique hydrological processes that control flow regime and water levels. One of the most important processes is the formation, growth and melting of different types of ice in and around the stream channel during winter. LÄS MER

  2. 2. Skogen som livsmiljö : En rättsvetenskaplig studie om skyddet för biologisk mångfald

    Författare :Maria Forsberg; Charlotta Zetterberg; Gabriel Michanek; Annika Nilsson; Uppsala universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; biologisk mångfald; skog; skogsbruk; bevara; skydd; miljörätt; äganderätt; ersättningsrätt; planering; planer; adaptiv förvaltning; Miljörätt; Environmental Law;

    Sammanfattning : Globally, species are being eradicated at an accelerated rate, up to 1000 times faster than the rate of natural species loss. This is primarily due to the reduction and degradation of species habitats. As biodiversity decreases, ecosystems risk losing significant ecological processes and functions, such as natural water purification. LÄS MER

  3. 3. Gastrotricha of Sweden - Biodiversity and Phylogeny

    Författare :Tobias Kånneby; Ulf Jondelius; M. Antonio Todaro; Sven Boström; Rick Hochberg; Naturhistoriska riksmuseet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; NATURVETENSKAP; taxonomy; systematics; phylogeny; new species; cryptic species; Chaetonotidae; Dasydytidae; Thaumastodermatidae; Livets mångfald; Diversity of life; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Sammanfattning : Gastrotricha are small aquatic invertebrates with approximately 770 known species. The group has a cosmopolitan distribution and is currently classified into two orders, Chaetonotida and Macrodasyida. The gastrotrich fauna of Sweden is poorly known: a couple of years ago only 29 species had been reported. LÄS MER

  4. 4. Biologisk mångfald i läroböcker i biologi

    Författare :Maria Ferlin; Högskolan i Borås; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; textbooks; biological diversity; social semiotics; multimodality; meaning making; concept; species; species concept; Utbildningsvetenskap med inriktning mot naturvetenskap;

    Sammanfattning : The aim of this thesis is to analyse offered meaning, that is, what and how subject content is communicated to the recipients. In this case the subject content is biological diversity and the communicative artefacts are biology books for the latter grades in the Swedish compulsory school. LÄS MER

  5. 5. Skyddet av biologisk mångfald vid jakt : en studie om rättens förhållande till komplexa och dynamiska ekosystem tillämpat på uttag av viltarter

    Författare :Anna Christiernsson; Luleå tekniska universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Law; Rättsvetenskap;

    Sammanfattning : Biological diversity, or the variety of genes, species and ecosystem, is fundamental to all life on Earth. The conservation of biodiversity is consequently recognized both in national and international law as one of the prerequisites for achieving a sustainable development. However, the decrease in biodiversity is continuing, at all levels. LÄS MER