Sökning: "species concept"

Visar resultat 1 - 5 av 167 avhandlingar innehållade orden species concept.

  1. 1. Biologisk mångfald i läroböcker i biologi

    Författare :Maria Ferlin; Högskolan i Borås; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; textbooks; biological diversity; social semiotics; multimodality; meaning making; concept; species; species concept; Utbildningsvetenskap med inriktning mot naturvetenskap; Textbooks; Biological diversity; Social semiotics; Multimodality; Meaning making; Concept; Species; Species concept;

    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

  3. 2. Integrative taxonomy of birds : Studies into the nature, origin and delimitation of species

    Författare :George Sangster; Per G. P. Ericson; Martin Päckert; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Aves; biogeography; integrative taxonomy; pluralism; ring species; speciation; species criteria; species limits; taxon chain; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Sammanfattning : Species are the basic currency in biodiversity studies but what constitutes a species has long been controversial. A major breakthough was the insight that most systematists agree that species are segments of population lineages, and that multiple lines of evidence should be employed and integrated, a procedure called integrative taxonomy. LÄS MER

  4. 3. The Concepts of Health, Well-being and Welfare as Applied to Animals : A Philosophical Analysis of the Concepts with the Regard to the Differences Between Animals

    Författare :Henrik Lerner; Lennart Nordenfelt; Stefan Gunnarsson; David Fraser; Linköpings universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Concept; concept formation; welfare; definition; health; legislation; natural behaviour; role for animals; science of animal health and welfare; veterinary medicine; well-being; begrepp; begreppsbildning; definition; djurs roller; hälsa; lagstiftning; naturligt beteende; veterinärmedicin; välbefinnande; välfärd; Philosophy subjects; Filosofiämnen;

    Sammanfattning : This thesis is an analysis of the use and definition of the concepts health, well-being and welfare within the field called “the science of animal health and welfare”. The materials used are a literature survey of the field, qualitative interviews with Swedish veterinary surgeons and a study of the concepts in legislation concerning animals in England, Germany and Sweden. LÄS MER

  5. 4. The Big Bad EU? Species Protection and European Federalism : A Case Study of Wolf Conservation and Contestation in Sweden

    Författare :Yaffa Epstein; Jan Darpö; An Cliquet; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Habitats Directive; species protection; subsidiarity; Endangered Species Act;

    Sammanfattning : This dissertation examines how eco-knowledge intersects with the changes to EU legal cultures and practices known as eurolegalism. This conjunction has created a mechanism for the extension of EU law in the Member States even in the face of a weakened EU. LÄS MER

  7. 5. Interaction strength and keystone species in model food webs

    Författare :Maria Christianou; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; interaction strength; keystone species; keystone links; permanence; resilience; local stability; Lotka-Volterra models; species loss;

    Sammanfattning : Ecological communities are often exposed to different kind of disturbances of varied magnitude. The response to disturbances can be affected by, among other factors, the strength of interactions between species within the community. LÄS MER