Sökning: "trophic factor"

Visar resultat 21 - 25 av 62 avhandlingar innehållade orden trophic factor.

  1. 21. Ecosystem processes and biodiversity : theoretical studies and experiments with an aquatic model ecosystem

    Författare :Jon Norberg; Michael L Pace; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Systems Ecology; systemekologi;

    Sammanfattning : Today, human enterprise has implications for all of nature, from the well being of the smallest organism, to the alteration of global biogeochemical cycles. To understand how major ecosystem processes are affected by environmental changes and decreasing biodiversity is crucial as many of natures services depend of such processes. LÄS MER

  3. 22. Neuroplasticity and neurorestoration in the treatment of Parkinson's Disease: Experimental studies in the mouse

    Författare :Veronica Francardo; Basala gangliernas patofysiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Neuroplasticity is the brain´s capacity to respond to inner and outer challenges with functional and structural reorganizations. An aberrant activation of neuroplasticity pathways may contribute to the development of neurological disease. LÄS MER

  4. 23. Response of marine food webs to climate-induced changes in temperature and inflow of allochthonous organic matter

    Författare :Rickard Degerman; Agneta Andersson; Risto Lignell; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Climate change; bacterial production; mesocosm; food web efficiency; Baltic Sea;

    Sammanfattning : Global records of temperature show a warming trend both in the atmosphere and in the oceans. Current climate change scenarios indicate that global temperature will continue to increase in the future. The effects will however be very different in different geographic regions. LÄS MER

  5. 24. Spinal motoneurons and molecules related to neurotrophic function after axon injury

    Författare :Henrik Hammarberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :immunohistochemistry; in situ hybridization; spinal cord; motoneuron; axotomy; survival; regeneration; MHC 1; leukocyte; cell culture; mRNA expression;

    Sammanfattning : The capacity of motoneurons to survive and regenerate new axons after injuries such as axotomy depends on a great variety of parameters. After sciatic nerve transection (SNT) in adult rats and to some extent after a ventral funiculus lesion (VFL), many cells survive and regeneration is highly prioritized. LÄS MER

  7. 25. The role of crustacean zooplankton in pelagic nutrient cycling

    Författare :Tobias Vrede; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; nutrients; freshwaters; food web; Cladocera; Calanoida; stoichiometry; Biologi; Biology; Biologi; limnologi; Limnology;

    Sammanfattning : Herbivorous crustacean zooplankton link phytoplankton and other microorganisms withhigher trophic levels in pelagic food webs. Crustaceans show little intraspecificvariation in somatic C:N:P elemental ratios, which may have implications for theregulation of zooplankton growth and for nutrient cycling. LÄS MER