My son is testing the effect of light exposure on bioluminescent dinoflagellates and their circadian rhythm, similar to project described on Science Buddies website.
Three groups of specimens:
1) Group 1, control group, kept in light and dark
2) Group 2, kept in constant light
3) Group 3, kept in constant darkness
He is observing the degree of boiluminescence of each group twice a day, once during "AM hours" and once during "PM hours".
He noticed the following:
1) Control (Group 1) is following expected rhythm of strong bioluminescence during "PM" hours
2) Group 2 (constant light) is producing strong bioluminescence in the AM and PM for TEN DAYS and counting.
3) Group 3 (constant darkness) is also producing strong bioluminescence in the AM and PM for TEN DAYS and counting. Slightly brighter during "AM hours" and now they appear to be fading completely on days 11 and 12.
a) What is going on with Group 2 (constant light) and Group 3 (constant darkness) / How can the results be explained?
b) He hypothesized that Groups 2 and 3 would die out/stop glowing, but they are still going! Should he keep measuring for a few more days?
c) Lastly, what camera can be used to photograph bioluminescence?
[Administrator added: URL for Science Buddies project: http://www.sciencebuddies.org/science-f ... p033.shtml