Publications by authors named "Sonja Wiegmann"
Organic ligands such as exopolymeric substances (EPS) are known to form complexes with iron (Fe) and modulate phytoplankton growth. However, the effect of organic ligands on bacterial and viral communities remains largely unknown. Here, we assessed how Fe associated with organic ligands influences phytoplankton, microbial, and viral abundances and their diversity in the Southern Ocean.
View Article and Find Full Text PDFSatellite remote sensing of chlorophyll a concentration (Chl-a) in the Arctic Ocean is spatially and temporally limited and needs to be supplemented and validated with substantial volumes of in situ observations. Here, we evaluated the capability of obtaining highly resolved in situ surface Chl-a using underway spectrophotometry operated during two summer cruises in 2015 and 2016 in the Fram Strait. Results showed that Chl-a measured using high pressure liquid chromatography (HPLC) was well related (R2 = 0.
View Article and Find Full Text PDFArticle Synopsis
- Understanding coastal ecosystems requires continuous observation of physical, chemical, and biological interactions, leading to a need for affordable in situ sensors.
- This study investigates the effectiveness of beam attenuation spectra using an optical transmissometer to analyze estuarine waters in Alfacs Bay, linking spectral data to biogeochemical variables.
- Results demonstrate significant correlations between beam attenuation measurements and key biogeochemical parameters (total suspended matter, chlorophyll a, and colored dissolved organic matter), highlighting its potential as a rapid and cost-effective monitoring tool.