Sökning: "GPP"
Visar resultat 16 - 20 av 48 uppsatser innehållade ordet GPP.
16. NDVI time series analysis for desert locust outbreak detection and quantification analysis of its impact on vegetation productivity of Sahel
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : It has been shown that the semi-arid environment of the Sahelian belt plays an important role in the global carbon uptake as the fluctuation of its primary productivity can be determinant for the global carbon uptake. The insect Schistocerca gregaria commonly known as the desert locust is a disturbance factor that can affect the vegetation productivity for consecutive seasons. LÄS MER
17. A remote-sensing approach to studying drought resistance in Swedish old-growth and production forests
Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskapSammanfattning : Boreal forest ecosystems are predicted to experience hotter and drier summers due to climate change, leading to more frequently reduced soil water availability and an increased risk of droughts, as was already the case in Northern Europe during the severe summer drought of 2018. Prolonged water stress in forest ecosystems can lead to impacts ranging from reduced photosynthesis to forest dieback. LÄS MER
18. The role of wood ants (Formica rufa) in the Arctic tundra and how climate change may alter this role
Master-uppsats,Sammanfattning : In the Arctic tundra, wood ants play an important ecological role in aerating the soil, cycling nutrients, for seed dispersal and, as biological control by preying on forest pest insects during outbreaks. The increase in temperature, caused by climate change, is positively associated with ant abundance. LÄS MER
19. Grön upphandling : En analys av hur gröna krav påverkar anbudspris och antalanbudsgivare vid offentlig upphandling av lokalvård
Magister-uppsats, Umeå universitet/NationalekonomiSammanfattning : Grön offentlig upphandling (GPP) används som styrmedel för att myndigheter genom inköp ska kunna påverka marknader att bli mer miljövänliga. GPP innebär att den upphandlande myndigheten inför miljökrav i upphandlingen som leverantören måste uppfylla. LÄS MER
20. The role of wood ants (Formica rufa) in the Arctic tundra and how climate change may alter this role
Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : In the Arctic tundra, wood ants play an important ecological role in aerating the soil, cycling nutrients, for seed dispersal and, as biological control by preying on forest pest insects during outbreaks. The increase in temperature, caused by climate change, is positively associated with ant abundance. LÄS MER
