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Lect_17_Phytopl

Lect_17_Phytopl - Lecture 17 The phytoplankton The plankton...

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Lecture 17: The phytoplankton The plankton Diversity of phytoplankton Paradox of the plankton Resource partitioning “Lake water, sparkling in the sun, conceals in every liter millions of organisms. It is closer to a slum than a paradise.” - B. Moss
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phytoplankton Protozoa (flagellates and ciliates) Rotifer (microzooplankton) Daphnia 20 μm Bacteria and viruses smaller yet
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So many phytoplankton! By size, in μm; 0.2-2.0 = picoplankton 2.0-20.0 = nanoplankton >20.0 = microplankton But every size range contains other types of organism too Major taxonomic groups (freshwater): 6 groups cover most of the action
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Thermophilic cyanobacteria in springs at Yellowstone National Park, Montana, USA Group 1: Cyanophyta (Blue-green algae) Prokaryotic, often N 2 fixing, sometimes specialize in extreme environments
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Given that the Competitive Exclusion Principle states that perfect competitors cannot co-exist, and Given that phytoplankton appear to be simple plants (all competing for light and nutrients) living in a homogeneous environment. How can so many species of
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Lect_17_Phytopl - Lecture 17 The phytoplankton The plankton...

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