Sökning: "net primary production"
Visar resultat 1 - 5 av 210 avhandlingar innehållade orden net primary production.
Sammanfattning : The trophic state of lakes is commonly defined by the concentration of nutrients in the water column. High nutrient concentrations generate high phytoplankton production, and lakes with low nutrient concentrations are considered low-productive. LÄS MER
Sammanfattning : Climate warming is predicted to affect northern lake food webs in two ways: (1)directly via changes in water temperature and ice conditions, and (2) indirectlyvia changes in catchment characteristics and processes that influence input ofallochthonous coloured dissolved organic matter (cDOM) and nutrients. Input ofcDOM increases carbon dioxide (CO2) availability, causes brownification andreduced light conditions, and may increase nutrient availability especially forpelagic primary producers. LÄS MER
3. Primary Production in African Drylands : Quantifying Supply and Demand Using Earth Observation and Socio-ecological Data
Sammanfattning : The human-environment connection in the mostly rural drylands of sub-Saharan Africa forms a complex, interlinked system that provides ecosystem services. This system is susceptible to climatic variability that impacts the supply of its products, and high population growth, which impacts the demand for these products. LÄS MER
Sammanfattning : Selective IgA deficiency (IgAD) (serum IgA concentration of T), which abolished expression of the TACI molecule. In addition, we found the previously recognized C104R and C172Y mutations in a heterozygous form in 2 patients with CVID and one, novel, heterozygous P42T mutation. LÄS MER
Sammanfattning : Primary HIV-1 infection (PHI) is usually defined as a mononucleosis-like illness associated with seroconversion to HIV. In earlier studies using I st generation antibody tests, the duration of the 'window period' from infection to detection of specific HIV-antibodies, could be 2 to 3 months, or longer. LÄS MER