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Dr Richardson and his colleagues reviewed literature linking jellyfish blooms with overfishing and eutrophication (high levels of nutrients).
Jellyfish are normally kept in check by fish, which eat small jellyfish and compete for jellyfish food such as zooplankton, he says.
But with overfishing, jellyfish numbers are increasing. Jellyfish feed on fish eggs and larvae, further impacting on fish numbers.
To add insult to injury, nitrogen and phosphorous in run-off cause red phytoplankton blooms, which create low-oxygen dead zones where jellyfish survive, but fish cannot.
Originally posted by dallas18
ahh wonder if this is related to that crop circle
[edit on 8/6/09 by dallas18]