Phytoplankton. Phytoplankton Taxonomy Diatoms Dinoflagellates Coccolithophores Cyanobacteria others…

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Presentation transcript:

Phytoplankton

Phytoplankton Taxonomy Diatoms Dinoflagellates Coccolithophores Cyanobacteria others…

Diatoms Frustule valves (Silica) Pennate and Radial species Autotrophic

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 toxicus Ciguatera 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

Florisphaera profunda

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