BNS-1002 Introduction to algae

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  • Created by: Omar-uni
  • Created on: 30-09-19 18:53
What are the 2 categories for algae?
Micro and Macro algae
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What is Micro algae?
Phytoplankton
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What is Macro algae?
Seaweed
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Name 2 uses for seaweed:
Cosmetics e.g. creams and as part of a diet
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Are Seaweeds plants or algae?
Algae
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What does Seaweed contain many of?
Chlorophyll and other pigments for photosynthesis
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Where can Seaweed photosynthesise?
Both in and out of water
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What does a Seaweed cell have just like a plant?
A cell wall
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What 3 things does Seaweed not have?
Flowers, roots and a sophisticated internal transport system
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What is the first stage of classification for Seaweed?
Colour
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What are the different colours of Seaweed?
Red, Green and Brown
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Around how many species of Red Seaweed is there?
5000
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Around how many species of Green Seaweed is there?
1000
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Around how many species of Brown Seaweed is there?
1500
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What is the Acronym for factors affecting location of sea weed growth?
LSTCGWP
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What does LSTCGWP stand for?
Lonely Siberian Tigers Can't Get Women Pregnant
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What are the factors?
Light, Salinity, Temperature, Competition for space, Grazing by herbivores, Wave action and Periods of drying out
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What 2 things are key to seaweed water immersion?
Tidal Range and Periodicity
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What percentage of Seaweed is water?
80%
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What 2 ways may salinity on the shore be changed?
Raised or Lowered
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How may salinity on a shore be raised?
By Evapouration
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How may salinity on a shore be lowered?
Due to rain, streams, Estuaries and Rivulets
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What does Seaweed have a high range of?
Salinity Tolerance
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What does Salinity tolerance depend on?
Exposure to water
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What term is used to describe the whole of the seaweed?
Thallus
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What does a Thallus (Thalli) include?
Stipes, Holdfasts, Blades/Fronds
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What is a stipe?
Similar to a stem, long and flexible
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What are Holdfasts?
Root like, strong attachments
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What are blades?
Leaf like, help with stability in water
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What is the purpose of a stipe?
To enable the whole community to sway in the water
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What is the purpose of Holdfasts?
Helps the organism attach to the rock
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How do Holdfasts help the organism attach to the rock?
By secreting really strong adhesives from specialised cells within
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What is the purpose of cuts within the blades?
To allow water to flow within the blades causing less damage
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What is the purpose of Air bladders?
To allow fronds to float in the water, to maximise light intensity
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What increases nutrient exchange?
Large surface areas & ruffled edges
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How does seaweed deter grazers?
By having acid filled cells (sulfuric acid vesicles) and hard cell walls, encrusted seaweed by calcium carbonate
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Why might some seaweeds shed their skin?
To get rid of epiphytes which grow on the surface of seaweed
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Why do they get rid of epiphytes?
Because they reduce light intake and increase drag in water
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Can seaweeds grow in icy conditions?
Yes
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How do we get seaweed for products?
Harvest from the wild, or farm it
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Why does farming seaweed cause damage?
Due to fertilising which leads to overnutrients
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Other cards in this set

Card 2

Front

What is Micro algae?

Back

Phytoplankton

Card 3

Front

What is Macro algae?

Back

Preview of the front of card 3

Card 4

Front

Name 2 uses for seaweed:

Back

Preview of the front of card 4

Card 5

Front

Are Seaweeds plants or algae?

Back

Preview of the front of card 5
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