Sökning: "riparian plant species"

Visar resultat 6 - 10 av 13 avhandlingar innehållade orden riparian plant species.

  1. 6. Conservation of transcription factors in infected cells of nitrogen-fixing root nodules

    Författare :Behnoosh Rashidi; Katharina Pawlowski; Karsten Niehaus; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; root nodules; actinorhiza; legumes; infection thread; Frankia; subtilase; leghemoglobin; chitinase; Plant physiology; Växtfysiologi; Plant Physiology; växtfysiologi;

    Sammanfattning : Infected cells of nitrogen-fixing root nodules are the only plant cells that can stably internally accommodate a eubacterial symbiont. In the context of studying the differentiation of infected cells, we set about to analyse the conservation of infected cell-specific transcription factors using altogether four different promoters from genes showing infected cell-specific expression, or nodule-specific expression. LÄS MER

  3. 7. Gradients of time and complexity : understanding how riparian and instream ecosystems recover after stream restoration

    Författare :Eliza Maher Hasselquist; Christer Nilsson; Stewart Rood; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bioassessment; biodiversity; boreal; bryophyte; chronosequence; complexity; diatom; geomorphology; habitat heterogeneity; hydromorphological; macroinvertebrate; macrophyte; nitrogen cycling; river restoration; riparian buffer; stable isotopes; succession; Sweden; Environmental Science; miljövetenskap;

    Sammanfattning : Why evaluations of the ecological outcomes of stream and river restoration have largely reported inconclusive or negative results has been the subject of much debate over the last decade or more. Understanding the reasons behind the lack of positive results is important for bettering future restoration efforts and setting realistic expectations for restoration outcomes. LÄS MER

  4. 8. Spatial and evolutionary aspects of species diversity, species traits, and human impact with examples from boreal riparian and forest plant communities

    Författare :Mats Dynesius; Umeå universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 9. Vegetation patterns and processes in riparian landscapes

    Författare :Birgitta Malm Renöfält; Christer Nilsson; Peter Edwards; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The objective of this study was to increase understanding of the processes structuring and controlling the species richness of riparian plant communities. In particular, I examined the unimodal relationship, found in many rivers, between plant species richness and location along the river corridor. LÄS MER

  7. 10. Ice, wood and rocks : regulating elements in riverine ecosystems

    Författare :Johanna Engström; Christer Nilsson; Roland Jansson; James Helfield; Tenna Riis; Umeå universitet; []
    Nyckelord :riparian zone; timber floating; river restoration; cut-off side channels; hydrochory; large wood; anchor ice; fish;

    Sammanfattning : Riparian ecosystems are of great importance in the landscape, connecting landscape elements longitudinally and laterally and often encompassing sharp environmental gradients in ecological processes and communities. They are influenced by fluvial disturbances such as flooding, erosion and sediment deposition, which create dynamic and spatially heterogeneous habitats that support a high diversity of species. LÄS MER