Sökning: "Chlorophyll"

Visar resultat 26 - 30 av 93 uppsatser innehållade ordet Chlorophyll.

1. 26. Design and implementation of embedded system for chl-a fluorescence detection

   Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Författare :Anargyros Katsogridakis; [2021]
   Nyckelord :Embedded systems; Microcontrollers; Harmful algal bloom; Climate change; chl-a fluorescence; Inbyggda system; mikrokontroller; skadlig algblomning; klimatförändring; chl-a-fluorescens;

   Sammanfattning : Over the last decades, the effects of climate change have become increasingly evident across natural environments. Apart from other areas, climate change poses a serious threat on water quality. LÄS MER

3. 27. Agriculture monitoring using satellite data

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Graff Erik; [2021]
   Nyckelord :Sentinel; satellite; agriculture; monitoring; dynamic time warping; remote sensing;

   Sammanfattning : As technology advances, the possibility of using satellite data and observations to aid inagricultural activities comes closer to reality. Swedish farmers can apply for subsidies for their land in which crop management and animal grazing occurs, and every year thousands of manual follow-up checks are conducted by Svenska Jordbruksverket (Swedish Board of Agriculture) to validate the farmers’ claims to financial aid. LÄS MER

4. 28. Väder- och klimatförändringars effekter på produktivitet och sedimentation i en boreal sjö

   Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Albin Eriksson; [2021]
   Nyckelord :Chlorophyll; Climate-change; Paleolimnology; Sediment traps; Freeze-coring; Klorofyll; Klimatförändringar; Paleolimnologi; Sedimentfällor; Frysproppar;

   Sammanfattning : This report aimed to investigate how chlorophyll-concentrations (Chl-a) in the water column and varved sediments were affected by changes in air temperature and precipitation and consequently how climate change will affect the sedimentation and productivity in boreal aquatic ecosystems. VRS (visible-reflectance-spectroscopy) was used to asses Chl-a and its derivates in sediment trap samples between 2002-2021 and in a series of freeze cores (1979-2021) from lake Nylandssjön, with annually laminated sediments. LÄS MER

5. 29. Using Sentinel-2 Satellite Images to Estimate Traits of Forage Grasslands

   Master-uppsats, SLU/Dept. of Agricultural Research for Northern Sweden

   Författare :Niklas Zeiner; [2021]
   Nyckelord :Remote sensing; Forage grasslands; Sentinel-2; Dry matter yield; Canopy average height; Total leaf chlorophyll content; Partial least squares; Support vector machines;

   Sammanfattning : In this project, regression models based on data from field measurements and spectral information extracted from satellite imagery were used to estimate traits of forage grasslands; dry matter yield, canopy average height and total leaf chlorophyll. Four fields at SLUs Röbäcksdalen field station were sampled on 22 occasions and a total of 198 samples, including measurement of the highest plant, canopy height, leaf chlorophyll content, canopy spectral reflectance and biomass were collected. LÄS MER

7. 30. The influence of diel cycles on the bacterial community composition of two boreal lakes : A case study in Jämtland

   Master-uppsats, Uppsala universitet/Limnologi; Uppsala universitet/Institutionen för biologisk grundutbildning

   Författare :Sofia Papadopoulou; [2021]
   Nyckelord :freshwater; lake; diel cycle; bacterioplankton; bacterial community composition;

   Sammanfattning : In the Boreal region, the length of day and night varies extremely over the year and organisms are exposed to different diel (24 h) fluctuations of light and temperature. Among them are pelagic populations of bacteria that are ubiquitous in freshwater ecosystems. LÄS MER