Essays about: "colonization and extinction"

Found 4 essays containing the words colonization and extinction.

  1. 1. Medium-term population development and responses to habitat conditions of a beetle, Osmoderma eremita, inhabiting hollow trees

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Olle Tranberg; [2016]
    Keywords : Osmoderma eremita; European hermit beetle; metapopulation; colonization and extinction; habitat; saproxylic species; tree hollows; Pedunculate oak; Quercus robur;

    Abstract : Old oaks play an important role in the southern Swedish landscape by maintaining available habitats for many saproxylic species, several of which today are on the international Red List of threatened species. Old oaks can develop important habitats, such as hollows with wood mould, which is the habitat for the European hermit beetle (Osmoderma eremita). READ MORE

  3. 2. The post-glacial colonization of fish populations can be dated with DNA in lake sediments.

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Fredrik Olajos; [2016]
    Keywords : ;

    Abstract : The age of natural populations is crucial information when studying processes like extinction,colonization, adaptation and evolutionary divergence. Here I evaluate if DNA in lakesediments can be used to date the colonization by whitefish (Coregonus lavaretus) in lakes incentral Sweden. READ MORE

  4. 3. Ecology of the lichen Cladonia botrytes in Sweden

    University essay from SLU/Dept. of Ecology

    Author : Kristine Bogomazova; [2012]
    Keywords : logging; stumps; habitat; species occurrence;

    Abstract : ABSTRACT Rapid changes in the forest structure due to logging strongly affect lichen vegetation and can exceed tolerance of many organisms while being beneficial to others. Cladonia botrytes was supposed to be obligately lignicolous and having a high portion of the occurrences on stumps on clear-cuts. READ MORE

  5. 4. Rätten till Norrland : nutida strider, historisk arena

    University essay from SLU/Dept. of Forest Ecology and Management

    Author : Johan Oskarsson; Martin Busk; [2007]
    Keywords : lapp; same; ren; renskötsel; kolonisation; markrättigheter; skogsbruk; rättshistoria; lag;

    Abstract : An introduction to the complexity which surrounds the matters of land in the northern parts of Sweden was the purpose of this thesis. The agriculture colonization, the delimitation and the development of forestry and mining business were big events which are shown from the view of property rights. READ MORE