Nutrients and zooplankton as multiple stressors or phytoplankton communities: evidence from size structure
Article Abstract:
Evidence from size structure has been examined in the study of zooplankton and nutrients as stressors on phytoplankton communities with zooplankton size an indicator for the food-web structure. Iinteractive and independent effects of nutrients and food-web structure on phytoplankton size structure are looked at by fitting time-series models to data from three lakes where the factors were manipulated. Three approaches were used. Size structure was a very good descriptor for changes in phytoplankton communities after nutrient inputs and food-web structure were varied. Size spectra and size classes were very effective approaches for summarizing size structure; average phytoplankton size was less effective.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Cell size versus taxonomic composition as determinants of UV-sensitivity in natural phytoplankton communities
Article Abstract:
Cell size and taxonomic composition in natural phytoplankton communities are discussed as determinants of ultraviolet (UV) sensitivity. The hypothesis that cell size is a key factor in determination of the extent of UV phytoplankton damage with greatest effects on small cells has been tested in subarctic lake communities. Cell size was found not to be a good index of UV sensitivity. Cyanobacteria-dominated picophytoplankton are less sensitive to higher UVB than would seen likely based on cell size relationship predictions.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
A dynamic regulatory model of phytoplankton acclimation to light, nutrients, and temperature
Article Abstract:
A model has been developed to represent acclimation of phytoplankton to irradiance, temperature and availability of nutrients. Three indices of phytoplankton biomass are used: phytoplankton carbon, phytoplankton nitrogen, and chlorophyll alpha. The model's main features include using the nitrogen: carbon ratio for parameterization of relationships between carbon and nitrogen metabolism and connecting nitrogen assimilation and pigment synthesis.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: An enriched mantle source for potassic basanites: evidence from Karisimbi volcano, Virunga volcanic province, Rwanda
- Abstracts: Structural signature of tectonic processes in the Calabrian Arc, southern Italy: evidence from the oceanic-derived Diamante-Terranova unit
- Abstracts: Ferric-ferrous ratios, H2O contents and D/H ratios of phlogopite and biotite from lavas of different tectonic regimes. part 2
- Abstracts: Short-term responses of coral reef microphytobenthic communities to inorganic nutrient loading. Phytoplankton distribution and grazing near coral reefs
- Abstracts: Organic enrichment of submarine-canyon and continental-shelf benthic communities by macroalgal drift imported from nearshore kelp forests