Sökning: "archipelago"

Visar resultat 21 - 25 av 90 avhandlingar innehållade ordet archipelago.

  1. 21. Spatial patterns of coastal breeding birds in the Baltic archipelago : ecological factors, human impact and conservation

    Författare :Maria Nord; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Coastal areas are crucial to numerous breeding bird species, but have undergone major changes because of anthropogenic development pressures such as altered land use and increased recreational activities. An understanding of what shapes species distribution patterns, and how human activities affect these patterns, is therefore necessary for marine management. LÄS MER

  3. 22. Island biogeography of young land uplift islands - viewed through the lens of bryophytes in a northern Swedish archipelago

    Författare :Andreas Karlsson Tiselius; Mats Dynesius; Roland Jansson; Göran Englund; Joakim Hjältén; Tord Snäll; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; functional data analysis; metacommunity; isolation; mosses; liverworts; sporophyte production; dispersal-establishment trade-off; ekologisk botanik; Ecological Botany; Conservation Biology; naturvårdsbiologi; Statistics; statistik;

    Sammanfattning : Increasing habitat fragmentation and rapid global warming is changing the conditions for species populations and ecological communities around the world. This presents challenges for the maintenance of biodiversity and a dominant paradigm for conservation in fragmented habitats is given by island biogeography and metapopulation (or metacommunity) ecology. LÄS MER

  4. 23. On ash : a 12-year population ecological study of Fraxinus excelsior L., with special reference to some of its inter-specific interactions, in the deciduous woodland of the outer archipelago of Stockholm

    Författare :Per-Göran Tapper; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Fruiting in ash was irregular over the years. Years with abundant fruit production occurred as well as more or less barren years. The resource status of the trees had no decisive influence. LÄS MER

  5. 24. Understanding the visitor : A prerequisite for coastal zone planning

    Författare :Rosemarie Ankre; Mittuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Conflicts; zoning; visitors; planning; coastal areas; Human geography; economic geography; Kulturgeografi; ekonomisk geografi;

    Sammanfattning : Planning for tourism and outdoor recreation in coastal areas could be improved with knowledge of visitors´ attitudes, experiences, activities and geographical dispersion. The purpose of this thesis is to examine the knowledge of visitors in planning for tourism and outdoor recreation. LÄS MER

  7. 25. Factors structuring Fucus communities at open and complex coastlines in the Baltic Sea

    Författare :Martin Isaeus; Lena Kautsky; Johan Ehrlén; Stein Fredriksen; Stockholms universitet; []
    Nyckelord :Botany;

    Sammanfattning : This thesis deals with physical factors and biological interactions affecting the distribution of two fucoid species, Fucus vesiculosus and F. serratus, in the Baltic Sea. Studies have been carried out in two quite different environments: an archipelago, and an open rocky coast. LÄS MER