M. Venezuela

M. Venezuela

Courtesy of Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC

http://visibleearth.nasa.gov/view_rec.php?id=69


Duckweed forms green swirls atop Lake Maracaibo in northern Venezuela Lake Maracaibo is usually too salty to support duckweed. But in 2004, unusually heavy rain brought additional fresh water to the lake, which stirred the nutrient layers below and allowed them to float to the surface with the less dense freshwater layer on top. For a brief time, the plants doubled in area every day. Then, as the lake began to settle back into its normal layers with nutrient-rich waters on the salty bottom, the duckweed's growth slowed and eventually stopped.