|MadSci Network: General Biology|
Hi Chelsi If I had to choose between the two, I would probably look at Daphnia because caffeine and nicotine work on neurotransmitter/receptor systems an the nervous system and are more likely to have a drug-like effect in an animal. I imagine that any effect you see in plants would be more to do with straightforward toxicity than anything else, although you might see toxic effects in Daphnia too, depending on the dose. So, I would suggest Daphnia, or if you feel like being busy, try both and compare them. Hope that helps Dr David Hubble Leicester, UK Admin message: Check out these other answered posts about the effects of nicotine or caffeine on plants or Daphnia: About plants: Re: how does caffine effect plant growth? Re: Does Caffiene affect the growth of plants? Re: Effects of Caffeine on Plants? Re: How does caffeine effect the growth of plants? This should be especially helpful: Re: Why did the plant I am feeding with coffee grow then wither and die? About Daphnia: Re: How, and why does caffeine affect the rate of a daphnia's heart rate? Re: How does nicotine affect the heart rate of Daphnia? Please check our archives for more information.
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