Three years after Democrat-led investors bought two prominent Miami stations, critics say the plan to steer Spanish-language radio in a more moderate, professional direction has run aground. The buyers point to rough local media economics — and politics.

Many Florida springs suffer from reduced flow and habitat loss, as well as excessive algae and heavy pressure from human use. Because most of the state’s springs are not monitored by any research institution or government agency, the full scope of the problem remains unclear.