Yale Environment 360: Algal blooms in the Chesapeake Bay became increasingly frequent from 1991 to 2008, according to new research from the University of Maryland. Driven by runoff containing excess nitrogen and other nutrients, algal blooms can severely deplete oxygen levels and release significant amounts of toxins in the water, killing fish and altering food webs. Harmful algal blooms have long been plaguing the Chesapeake Bay and its tributaries, but water quality data from the Maryland Department of Natural Resources...