sentence: The As biotransformation potentials of the six diatom species during temperature treatment was : Skeletonema sp. > T. nitzschioides > N. longissima > A. karianus > D. brightwellii > C. didymus , whereas during the salinity treatment the order was : Skeletonema sp. > T. nitzschioides > A. karianus > D. brightwellii > N. longissima > C. didymus .