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Autotrophs. Algae and plants in ecosystems. “Are blue-green algae phytoplankton?” Phylogenetic Functional Functional: Plankton- freely floating , carried along by currents. Can be motile e.g. Rooted aquatic plants are not planktonic

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autotrophs

Autotrophs

Algae and plants in ecosystems

slide2

“Are blue-green algae phytoplankton?”

Phylogenetic Functional

Functional:

Plankton- freely floating , carried along by

currents. Can be motile

e.g. Rooted aquatic plants are not planktonic

Microscopic algae can be planktonic, those

that are comprise the PHYTOPLANKTON.

Phytoplankton are important in reservoirs

and in water column of large rivers.

slide3

Periphyton- Microscopic algae growing on

substrate (solid surface)

Epiphytes- microscopic algae growing on

macrophytes.

Macrophytes- vascular (rooted) plants,

mosses, liverworts, large colonial algal forms.

Epilithon- layer of algae, bacteria, and

mucilage covering substrate (rock surface).

slide4

KINGDOM- PHYLA- CLASS- ORDER

Procaryotes (bacteria)-

Blue-green algae:

a.k.a. cyanobacteria, cyanophytes

Eucaryotes (with organelles)

Planktonic and benthic phyla:

Diatoms (Bacillariophyceae)

Green algae

a.k.a. chlorophytes, chlorophyceae

example: Euglena sp.

Planktonic phyla:

Chrysophytes, Dinoflagellates, Cryptophytes

slide7

Diatoms- have silica frustules

Patterns of valves:

Planktonic- centric (radial)

Benthic- Trellisoid (Eunotia)

Gonoid (angular)

Pennate (around center line)

Pennate diatoms have a RAPHE or

PSEUDORAPHE:with raphe diatoms move by gliding on a mucilage trail

Terms: Epitheca, Hypotheca, Valve, Connecting Band