How would decreasing ocean salinity affect surface tension, and how would this reduced surface tension affect coastal zones? Seems to me that a decrease in salinity will decrease surface tension because density decreases with decreasing salinity. So I would think decrease in density would decrease surface tension. But I can't really find any solid evidence of this. Also, how would this decrease in ocean surface tension (if true) affect coastal zones? Would coastal acquifer-level rise, clay expansion, decrease tidal salt, and flora/faunal changes lead toward erosion or slumping of anykind? I don't think freshwater lakes have any anamolous type of erosion going on that saline lakes or the oceans do not.