Search for dissertations about: "mosses"

Showing result 1 - 5 of 41 swedish dissertations containing the word mosses.

  1. 1. Mosses as mediators of climate change implications for tree seedling establishment in the tundra

    University dissertation from Umeå : Umeå University

    Author : Signe Lett; Umeå universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; arctic; alpine; B. pubescens; bryophytes; competition; facilitation; mosses; P. sylvestris; precipitation changes; seedlings; traits; tree line; warming;

    Abstract : Alpine and arctic tree line expansion depends on the establishment of tree seedlings above the current tree line, which is expected to occur with climate warming. However, tree lines often fail to respond to higher temperatures. Other environmental factors are therefore likely important for tree seedling establishment. READ MORE

  2. 2. Genetic variation and sexual reproduction in a moss with dwarf males, Homalothecium lutescens

    University dissertation from Department of Biology, Lund University

    Author : Frida Rosengren; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bryophytes; mosses; dwarf males; sexual reproduction; genetic variation; genetic structure; inbreeding; isozymes; allozymes; SNP; sporophytes; spore; fertilization; fertility;

    Abstract : Dwarf males occur in many unrelated groups of organisms. Among land plants they are unique to mosses. Moss dwarf males originate from male spores that land and germinate on the female where their final size is restricted to a few mm. Fertilization in mosses occur over short distances with swimming spermatozoids. READ MORE

  3. 3. Grow with the flow Hydrological controls of riparian vegetation in boreal stream networks

    University dissertation from Umeå : Umeå Univeristy

    Author : Lenka Kuglerová; Umeå universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; boreal forest; channelization; groundwater; Krycklan catchment; liverworts; mosses; riparian buffers; riparian vegetation; river restoration; species richness; stream network; stream size; vascular plants;

    Abstract : What drives species diversity across landscapes is one of the most fundamental questions in ecology. Further, understanding the mechanisms underlying species diversity patterns is important not only for forming and challenging ecological theories but also essential for appropriate landscape management and effective nature conservation. READ MORE

  4. 4. Biological growth on rendered façades

    University dissertation from Lund University, Division of Building Materials

    Author : Sanne Johansson; Lund University.; Lunds universitet.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; temperature; render; radiation; photosynthesis; moulds; mosses; mortar; moisture; lichens; Imaging-PAM; humidity; heat capacity; heat; ETICS; algae; biological growth; calorimetry; desiccation tolerance;

    Abstract : Biological organisms have an incredible ability to adapt to almost any environment and the humans activities on earth have created many new habitats for different kinds of organisms. For example can certain organisms grow on rocks and vertical cliffs, and when humans started building houses with mineral based façades, some organisms found that these were new habitats to live on. READ MORE

  5. 5. Biological growth on mineral façades

    University dissertation from Division of Building Materials, LTH, Lund University

    Author : Sanne Johansson; Lund University.; Lunds universitet.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; moisture transport; mortar; mosses; biodeterioration; lichens; moulds; mineral facades; building physics; thin rendering on thermal insulation; heat transfer; biological growth; algae; heat capacity;

    Abstract : During the last years there has been reported considerable and rapid contamination on newly built rendered façades in Sweden due to biological growth. The problem is believed to occur mostly on façades of render applied on thermal insulation, but apart from this it is difficult to find clear relationships indication which façades might be infected. READ MORE