Sökning: "early land plants"

Visar resultat 1 - 5 av 28 avhandlingar innehållade orden early land plants.

  1. 1. Early land plant spores from the Paleozoic of Sweden – taxonomy, stratigraphy and paleoenvironments

    Författare :Kristina Mehlqvist; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Spores; early land plants; taxonomy; stratigraphy; biostratigraphy; Silurian;

    Sammanfattning : The Silurian through earliest Devonian, between ca 444 and 412 million years ago, was characterized by significant changes in global climate and environment. At that time, plants and animals had begun to expand the colonization of previous relatively desolate terrestrial landscape. LÄS MER

  3. 2. Distribution patterns of fleshy-fruited woody plants at local and regional scales

    Författare :Matilda Arnell; Ove Eriksson; Johan Ehrlén; Sara A.O. Cousins; Angela Moles; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fleshy fruits; woody plants; dispersal; distribution patterns; range filling; dispersal limitation; historical land use; spatial associations; point-pattern analysis; recruitment; reproduction; pollination; fruit set; fruit-removal; Daphne mezereum; Plant Ecology; växtekologi;

    Sammanfattning : Fleshy-fruited woody plants share a long history with humans, providing us with food and wood material. Because of this relation, we have actively moved some of these plants across landscapes and continents. LÄS MER

  4. 3. Jord, linne eller träkol? : Genusordning och hushållsstrategier, Bjuråker 1750-1850

    Författare :Rosemarie Fiebranz; Maria Sjöberg; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; History; Gender; agrarian history; proto-industrialisation; social differentiation; household; marital conflicts; inheritance practice; linen; charcoal burning; Hälsingland; Sweden; Historia; History subjects; Historieämnen; Historia; History;

    Sammanfattning : The aim of this study is to elucidate how people in a household-based pre-industrial agrarian economy acted during a period of great changes. The household is seen as a meaning-creating sym-bol in the local culture. LÄS MER

  5. 4. Disturbance regimes in dry sandy grasslands – past, present and future

    Författare :Anja Ödman; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Grassland conservation; sand steppe; land use history; conceptual model; soil disturbance; lime; nutrient availability; vascular plants; bryophytes; ground beetles; propagule supply;

    Sammanfattning : A number of sandy grassland habitats of interest for biodiversity conservation can be found in Europe. One such habitat is the threatened xeric sand calcareous grassland, which is home to a large number of endangered species. LÄS MER

  7. 5. Plant community assembly during succession from arable fields to semi-natural grassland

    Författare :Barbara Christine Schmid; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diversity; arable-to-grassland succession; space-for-time approach; land-use history; plant community assembly; grazing management; connectivity measures; dispersal vector; vascular plants; grassland specialist conservation;

    Sammanfattning : Large areas of grazed, species rich semi-natural grassland were lost in Europe during the last two centuries and as a consequence led to decreases in grassland specialist species. Therefore, today the “restoration” of grassland on previously arable fields is recommended for the protection of grassland specialists. LÄS MER