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What are the key marine zones
- Sub tidal : always covered by water , phytoplankton, sea grasses sea weed, endosymbionts
- Inter tidal Zone : sometimes covered ,also phytoplankton, sea grasses sea weed, endosymbionts
- Spray: a bit exposed to salt and a bit of moisture
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Why is Australia different?
- High level of endemism in algae
- australia has the greatest diversity of biomes of sea grass
- mangroves at the highest latitudes
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What are three algae
- Green algae : chloro a,b , carotene ,b
- red algae : chloro a , carotene a,b and phycocoblins
- brown algae : chlorophyll ac ,carotene b,fuconanthin
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Different types of algae
- Phytoplankton : CO2 pmp of the sea
- Attached micro algae: benthic species
- pest algae : attach to boats
- useful algae : food, agarose additives
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Higher plants
- dicots /monocots
- tropical / temperate
- duck weeds : stemless , very small leaves ,has sall trailing roots
- ferns azolla floating specieis , trainagular leaves, symbiotic with green gae
- sea grass relo : paddle wood
- pest weeds : noxious weeds
- microalgal blooms : blue green algae , dinoflagellates
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Human impacts
- Habitat loss
- salinity - reduced in abundance
- harvesting by collectors
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