Utilization of diversity indices in evaluating the effect of a paper mill effluent on bottom fauna

Bottom fauna surveys of the Lower Sabine River in the vicinity of Orange, Texas were performed from 1967 to 1969. During this time samples were taken before and after effluent from a black-liquor paper mill was discharge into the Sabine River. Species diversity indices were determined for each station (one station above the discharge canal and four below it). The results obtained indicated that the paper mill effluent was not disturbing the river to a degree that it would cause damage. However, the proximity of Sabine Lake (an estuary) and the very low flow often encountered on the Sabine River makes it imperative that high standards be imposed in treatment of the waste water and that qualified personnel make periodic studies on the river.