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Hi! I am working on a science fair project for my chemistry class. My question for my project is: How does concentrations of Pseudontzchia, the phytoplankton found in seawater that can produce domoic acid affect intertidal invertebrates? Would you use a plankton net to collect seawater samples of phytoplankton and other organisms? In my experiment I am thinking of taking the pH levels for each quantity of seawater to test the acidity of each sample I take. Do you know anything about domoic acid and its relationship to phytoplankton? I have found a few research sources on the subject in regards to domoic acid but not enough to help me experiment.
Question Date: 2008-02-26
Answer 1:

Apart from the fact that the phytoplankton produce it,I don't know how plankton relate to the toxin, or if its effects are pH-specific. If you modify pH much,though, you will kill the alga, which will cause it to stop producing.

I don't know if the plankton has a life cycle that spends part of its time in animal tissues (resulting in said animals becoming toxic). If so, then a collection net wouldn't catch it. Otherwise, it would.

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