Sökning: "disturbance"

Visar resultat 11 - 15 av 633 avhandlingar innehållade ordet disturbance.

  1. 11. Coral reefs in the Anthropocene : The effects of stress on coral metabolism and symbiont composition

    Författare :Suzanne Faxneld; Michael Tedengren; Alina Szmant; Stockholms universitet; []
    Nyckelord :Corals; Disturbance; Galaxea fascicularis; ITS2; Metabolism; mtDNA; Pollution; Porites lutea; Symbiodinium; Temperature; Turbinaria mesenterina; Vietnam; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Coral reefs constitute some of the most prolific and diverse ecosystems on our planet, but also among the most threatened. This thesis investigates the effects of environmental stressors on corals’ metabolism and symbiont diversity. LÄS MER

  3. 12. The ecological significance of sexual reproduction in peat mosses (Sphagnum)

    Författare :Sebastian Sundberg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Bryophyte; colonisation; disturbance; experiment; longevity; mire; safe site; spore; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Peat mosses (Sphagnum) are widely distributed and are a major component of mire vegetation and peat throughout the boreal and temperate regions. Most boreal Sphagnum species regularly produce sporophytes, but the ecological role of the spore has been questioned. LÄS MER

  4. 13. 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

  5. 14. Ecology, tourism and management of harbour seals (Phoca vitulina)

    Författare :Sandra M. Granquist; Anders Angerbjörn; Per-Åke Nilsson; Hrefna Sigurjónsdóttir; Arne Bjørge; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Harbour seals; Phoca vitulina; ecology; tourism; wildlife; disturbance; zoologisk ekologi; Animal Ecology;

    Sammanfattning : In cases where human and wildlife are co-using the same geographical areas and resources, management issues often get complex and stakeholder conflicts are common. The Icelandic harbour seal (Phoca vitulina) population is rapidly decreasing, but direct culling of seals still occurs. LÄS MER

  7. 15. Deltaic Dilemmas : Ecologies of Infrastructure in New Orleans

    Författare :Joshua Lewis; Henrik Ernstson; Nik Heynen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Infrastructure; New Orleans; resilience; historical ecology; urban ecology; disturbance; naturresurshushållning; Natural Resources Management;

    Sammanfattning : This thesis explores the relationship between water infrastructure, ecological change, and the politics of planning in New Orleans and the Mississippi River Delta, USA. Complex assemblages of water control infrastructure have been embedded in the delta over the last several centuries in an effort to keep its cities protected from floodwaters and maintain its waterways as standardized conduits for maritime transportation. LÄS MER