Sökning: "ecosystem functioning"

Visar resultat 21 - 25 av 92 avhandlingar innehållade orden ecosystem functioning.

  1. 21. Probing the Precipitationshed : A quantification of the biophysical dimensions of terrestrial moisture recycling

    Författare :Patrick W. Keys; Line Gordon; Steve Lyon; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; moisture recycling; precipitation; evaporation; variability; ecosystem services; naturresurshushållning; Natural Resources Management;

    Sammanfattning : Terrestrial moisture recycling is the phenomena whereby water evaporates from the land surface, travels through the atmosphere, and fall as precipitation downwind. The interaction of societies with this branch of the hydrological cycle, though critical to the productive functioning of ecosystems around the planet, remains poorly understood. LÄS MER

  3. 22. Modeling Carbon and Water Fluxes in European Terrestrial Ecosystems

    Författare :Pablo Morales; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climatology; Fysisk geografi; geomorphology; pedology; cartography; Physical geography; water fluxes; climate change; kartografi; geomorfologi; klimatologi; marklära; carbon fluxes; regional climate models; vegetation dynamics; ecosystem modeling;

    Sammanfattning : The controlling mechanisms and feedbacks between climate, the carbon and water cycling and vegetation in European ecosystems have attracted much attention in recent years but they are still not sufficiently understood. A better understanding of them is necessary to predict how they will be affected by climate change. LÄS MER

  4. 23. Ecosystems in the Anthropocene: the role of cropland management for carbon and nitrogen cycle processes

    Författare :Stefan Olin; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon; Nitrogen; DVM; Ecosystem modelling; Cropland; Management; Yields;

    Sammanfattning : Through deforestation and conversion of natural ecosystems to croplands and pastures, have humans released vast amounts of carbon (C) dioxide (CO2) into the atmosphere. Roughly one third of the cumulative anthropogenic emissions until today stem from these practices, the remainder being mostly due to fossil fuel combustion. LÄS MER

  5. 24. The Precipitationshed : Concepts, Methods, and Applications

    Författare :Patrick W. Keys; Line Gordon; Deliang Chen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; water; atmosphere; precipitationshed; moisture recycling; variability; ecosystem services; social-ecological systems; Sustainability Science; vetenskap om hållbar utveckling;

    Sammanfattning : Human societies are reliant on the functioning of the hydrologic cycle. The atmospheric branch of this cycle, often referred to as moisture recycling in the context of land-to-land exchange, refers to water evaporating, traveling through the atmosphere, and falling out as precipitation. LÄS MER

  7. 25. Determining food web transfer of radionuclides in marine benthic ecosystems

    Författare :Isak Holmerin; Clare Bradshaw; Nicholas Fisher; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; trophic transfer; radionuclides; benthic; ecosystem approach; Baltic Sea; Fukushima; Marine Ecotoxicology; marin ekotoxikologi;

    Sammanfattning : Food web interactions are vital in any functioning ecosystem and facilitate transfer of energy and nutrients between trophic levels. Unfortunately, they also facilitate transfer of contaminants such as anthropogenic radionuclides found in effluents from nuclear power plants (NPPs). LÄS MER