A study at the University of Wisconsin-Madison reveals that heavy rain and manure levels have been causing more algae blooms.  The study comes after multiple beaches were closed Wednesday when the Center for Limnology reported that a toxic algae bloom had begun to spread across Lake Mendota. The closures coincided with the launch of a new four-year effort by Dane County called Suck the Muck. This effort hopes to suck a century’s worth of phosphorus from 33 miles of streams that feed into the county’s lakes.