Lecture 25/26

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Author:
rcornelio
ID:
247254
Filename:
Lecture 25/26
Updated:
2013-11-17 12:16:53
Tags:
Marine Ecosystems
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  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Human impacts
    • Habitat loss
    • salinity - reduced in abundance¬†
    • harvesting by collectors

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