Erken Laboratory Research School 2004

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Erken Laboratory Research School 2004
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The primary production of benthic algaein Lake
Erken
Ian Moore

• Mariusz Belka

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Hypotesis

• There is production at 7 15 meters depth
  although light intensity is less then 1 of
  surface

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Whats primary production?

• New organic matter produced in process of
  photosynthesis

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What did we mesure?

• Light intensity
• Temperature
• Dissolved oxygen before and after incubation
• Chlorophyll a concentration

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How did we mesure?

• Ligth intensity
• By PAR Photometer

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How did we mesure?

• Temperature
• By Ruttner water sampler with a thermometer in
  the bottle
• Used also to mesure initial oxygen concentration

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How did we mesure?

• Chlorophyl a
• By spectrophotometer Hitachi U1100

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How did we mesure?

• Dissolved oxygen

Light core Respiration Production
Dark core Respiration only
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Results
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Results
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Results
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Results
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What could we do better?

• Ideas?