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Click to see additional instructions Use the following information to answer questions 2 3 and...

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Biology

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Click to see additional instructions Use the following information to answer questions 2 3 and 4 To measure primary production of algae in a stream you place two sealed chambers in the stream each enclosing the sediments as well as the water above them One chamber is covered with black tape blocking all light while the other is transparent to light You measure dissolved oxygen DO before and after a 24 hour incubation DO in the light chamber increased by 1 5 g m2 while DO in the dark chamber decreased by 2 0 g m2 Hint You have all the information you need to answer the following 3 questions you do not need initial and final DO values Think carefully about what is actua being measured in each of the two chambers What is the estimated ecosystem respiration Re for the stream Enter ONLY A NUMBER The units for your answer are g 02 m 2 day 1 Question 3 of 7 1 Points Click to see additional instructions What is the stream s esitmated NEP net ecosystem production Enter ONLY a number The units for your answer are g 02 m 2 day 1

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