phytoplankton. phytoplankton taxonomy diatoms dinoflagellates coccolithophores cyanobacteria...
Post on 21-Dec-2015
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Phytoplankton
Phytoplankton Taxonomy
• Diatoms• Dinoflagellates• Coccolithophores• Cyanobacteria• others…
Diatoms
• Frustule valves (Silica)• Pennate and Radial species• Autotrophic
Diatoms
Diatoms
Diatoms
Diatoms
Diatom Asexual Reproduction
Dinoflagelates
• 2 Flagella (certain mobility)• Theca plates (Cellulose)• Autotrophic, heterotrophic &
mixotrophic
Dinoflagelates
Diatoms vs Dinoflagellates
• Medium Light Intensity• Medium Nutrients• Temperate regions
• High Light Intensity• Very Low Nutrients• Tropical regions, low
productivity regions
Light Adaptation
Alexandrium tamarense Paralytic Shellfish Poisoning
(PSP)
Alexandrium spp. Blooms:
- High temp.- Low salinity
Gambierdiscus toxicusCiguatera Fish Poisoning
(CFP)
Pseudo-nitzschia spp.Amnesic Shellfish Poisoning (ASP)
Demoic Acid
Kogia breviceps
Chaetoceros spp.
Coccolithofores
• Calcareous plates• Small size – Nanoplankton
(>20μm)• Low productivity regions
Emiliania huxleyi www.earthguide.ucsd.edu
Florisphaera profunda
www.earthguide.ucsd.edu
Phytoplankton Distribution
Cyanobacteria & other Prokaryotic
Autotrophs• Very small size – Picoplankton
(>2μm)• Deepest waters• Open Ocean, low productivity
Cyanobacteria
Flow Cytometry
Identifying leukemias and lymphomas of mature B and T cells
DNA ploidy analysis of solid cancerous tumors
DNA fragment size quantification
Ultrasensitive fluorescence detection
Flow Cytometry
Absorption Spectrum
Light Penetration
Light Adaptation
High Light Adapted
Low Light Adapted
Chlorophyll Concentration
Figure 15.1d
Figure 15.1e