; and (v) in subparagraph (D), as so redesignated, by striking hypoxia modeling and monitoring data and inserting hypoxia modeling, forecasting, and monitoring and observation data ; and (4) in subsection (c), as so redesignated, by mending such subsection to read as follows: (c) Action strategy and scientific assessment for marine and freshwater harmful algal blooms (1) Not less often than once every five years, the Task Force shall complete and submit to Congress an action strategy, including a scientific assessment, for harmful algal blooms in the United States (in this Act referred to as the Action Strategy ). Each such Action Strategy, including scientific assessment, shall examine both marine and freshwater harmful algal blooms, including those in the Great Lakes and upper reaches of estuaries, those in freshwater lakes and rivers, and those that originate in freshwater lakes or rivers and migrate to coastal waters. (2) Each Action Strategy under this subsection shall— (A) examine the causes and ecological consequences, and the economic, social, and cultural impacts of harmful algal blooms; (B) examine the effect of other environmental stressors on harmful algal blooms; (C) examine potential methods to prevent, control, and mitigate harmful algal blooms and the potential ecological, social, cultural, and economic costs and benefits of such methods; (D) identify priorities for research needed to advance techniques and technologies to detect, predict, monitor, respond to, and minimize the occurrence, duration, and severity of harmful algal blooms, including recommendations to eliminate significant gaps in harmful algal bloom forecasting, monitoring, and observation data; (E) evaluate progress made by, and the needs of, Task Force activities and actions to prevent, control, and mitigate harmful algal blooms; (F) identify ways to improve coordination and prevent unnecessary duplication of effort among Federal departments and agencies with respect to research on harmful algal blooms