The murkiness (turbidity) of the water was analyzed and found to have several major sources, including ________.
erosion from the deforested hillsides, sediments produced from poorly treated wastewater discharge, and sediments produced from the increased plant biomass of the lake
A biodiversity survey of the lake revealed a striking decline in nearly all animal species and in rooted plant life, especially where streams discharged into the lake. The immediate cause(s) of the decline most likely were ________.
very low oxygen levels and lack of plants to support animal consumers
A task force composed of water quality chemists, environmental landscape experts, townspeople and corn growers meet and share information. They decide that they must focus on ________ in the initial efforts to restore the lake.
reducing fertilizer inputs into the lake by exploring alternative farming techniques, increasing the efficiency of the wastewater plant and using aerators to increase oxygen levels in the areas where streams flow into the lake.