Publications by authors named "Leon Katona"
Nearshore (littoral) habitats of clear lakes with high water quality are increasingly experiencing unexplained proliferations of filamentous algae that grow on submerged surfaces. These filamentous algal blooms (FABs) are sometimes associated with nutrient pollution in groundwater, but complex changes in climate, nutrient transport, lake hydrodynamics, and food web structure may also facilitate this emerging threat to clear lakes. A coordinated effort among members of the public, managers, and scientists is needed to document the occurrence of FABs, to standardize methods for measuring their severity, to adapt existing data collection networks to include nearshore habitats, and to mitigate and reverse this profound structural change in lake ecosystems.
View Article and Find Full Text PDFArticle Synopsis
- Recent studies indicate that PAM fluorometry may overestimate photosynthetic parameters in intact biofilms due to depth-integration effects, where deeper layers are activated by light penetration.
- A new slide-based thin-film technique was developed to measure fluorescence on a vertically representative subsample, resulting in significantly lower relative errors compared to conventional methods.
- Empirical results showed improved precision with the slide-based technique, especially for homogeneous biofilms, while emphasizing the need for careful subsampling to avoid issues in heterogeneous biofilms.