Previous Thumbnails Next  

2007-07-31-Green-Cay

Viewed one at a time, Water Lettuce does not appear to be much of threat.

But packed together, it can lead to a lower concentration of oxygen in covered waters and sediments by blocking air-water interface and root respiration. Extremely thick mats of water lettuce can even prevent sunlight from reaching underlying water. The cumulative effect of these negative characteristics of the plant is a loss of biodiversity in invaded habitats.

2007 by Peter Schulz