BIO 475 Lecture Notes - Lecture 6: Coralline Algae, Halimeda, Red Algae
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● Coralline algae pavement, flat as pavement.
● Algal turf, look and feel like real,spongy, grass turf
○ Same consistency as walking on a soccer field
○ Its algae not grass
○ Short, fish graze on it
○ Small area of turf could have 200 species of it
○ Important food source
● Reef flat macroalgae
○ Big + fleshy
● Halimeda
○ Important algae on reefs
○ Green links, sometimes will loose pigment and be white
○ Fine plates on sand is halimeda
○ It can make 80% of the sand on the reef
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● Reef algae productivity ( g C m-2*d-1)
Reef Community
○ Coralline algae 2.7
○ Flesh and filamentous algae 3.3
○ Coral zoox 11.0
● Cyanobacteria
○ Often it can be toxic
● Chlorophyta (green algae)
○ Makes calcium carbonate
○ Fleshy chlorophyte /Fleshy green algae = Caulerpa is one
○ Can grow in thick mats
○ Ulva green + gooey
● Phaeophyceae ( brown algae)
○ Padina
○ Dictyota
● Rhodophyta (red algae)
● Asparagopsis
Algae: cyanobacteria, green, brown, and red algae
Functional-form/
External
morphology
Anatomy
Size/texture
Example
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Document Summary
Algal turf, look and feel like real,spongy, grass turf. Same consistency as walking on a soccer field. Small area of turf could have 200 species of it. Green links, sometimes will loose pigment and be white. It can make 80% of the sand on the reef. Reef algae productivity ( g c m-2*d-1) Fleshy chlorophyte /fleshy green algae = caulerpa is one. Differentiated, heavily corticated, thick walled calcified , genicula, flexible intergeniculate. Know functional forms + an example from each exam. Algae is different colors due to different pigments which absorb different wavelength of light. All algae have chlorophyll a ( blue/orange) Green algae have chlorophyll b ( all blue, and yellow and red ; appear green) Brown algae have auxiliary pigments such a fucoxanthin that expands absorption into the green wavelengths and all them to proliferate at intermediate depths.
