Adaptive behavior of euryhaline phytoplankton communities to arsenic stress

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Abstract
Long-term experiments performed with large-volume continuous cultures of natural phytoplankton assemblages exposed to low levels of arsenate (1-10 .times. ambient concentrations) have shown that arsenate is differentially inhibiting to some phytoplankton species. This observed variance in sensitivity is sufficient to cause a marked change in species composition and succession of dominant species in As-treated assemblages with a potential for impact upon C transfer between trohic levels, even though estimates of community biomass and productivity indicate no change.

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