The Plum Island marsh is starting to look bland and absent of ice; spring is on it's way! Soon enough we will get to see a lot of phragmites and all sorts of other wildlife!
Today, I noticed this "foam" stuff on the top of the water. Even though i've been visiting Plum Island for the past 10 years, I actually had no idea what exactly this stuff was.
With a little bit of research, I found a little bit of information which seemed like a valid explanation of this "foam". I also learned that the foam is not necessarily from pollution.
"Lakes and streams are surrounded by living organisms, and many organisms live within the water itself. Both plants and animals produce lipids like simple fats — three fatty acids combined with a glycerol molecule. When any of these organisms die, they release fats, proteins, sugars and other molecules into the water. Nonpolar molecules like lipids float since they have a lower specific gravity than water and will not mix with water. As fats and other lipids break down, the released fatty acids also float to the surface. Thus, the surface of the water often has a thin, completely transparent layer of lipids on it. Through reactions similar to those used to make soap, the resulting molecules change the surface tension and, just like soap, they cause bubbles to form."
The quote above was taken from an article, if you would like to read more about this surface foam, here is the link.
http://redoubtreporter.wordpress.com/2009/07/15/science-of-the-seasons-bubbling-curiosity-%E2%80%94-most-water-foam-is-no-cause-for-concern/