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We found this http://www.epa.gov/lakessurvey/pdf/nla_chapter5.pdf new definition of Trophic State in a News Release from the EPA December 18, 2009 entitled EPA Releases First-Ever Baseline Study of U.S. Lakes.  This information may be very helpful in assessing your lakes now and in the future.    For the entire document about the study see http://www.epa.gov/lakessurvey .

The Trophic Index in Brief
 All lakes age in a way that they start off as oligotrophic lakes, and gradually change to eutrophic lakes. Allowing nutrients into the lakes through agriculture, fertilizers, streets, sewage, and storm drains can speed up this process.

Example of an Oligotrophic LakeOligotrophic Lakes Oligotrophic Lakes are those that are generally clear, deep, and free of weeds and large algae blooms. These lakes are low in nutrients, have low primary production, and do not support large fish populations. The food chain in oligotrophic lakes is very structured, and is capable of sustaining a fishery of large game fish. These lakes tend to be the most aesthetically pleasing of lakes due to their clear blue water. In oligotrophic lakes, there is usually a very high Secchi disc reading (in relation to the depth of the lake), and low phosphorus and chlorophyll readings.

Mesotrophic Lakes
Example of a Mesotrophic Lake Mesotrophic lakes are in the boundary between oligotrophic lakes and eutrophic lakes. They have more nutrients and production than the oligotrophic lakes, but not nearly as much as eutrophic lakes. Mesotrophic lakes have some accumulated organic matter on the bottom of the lake, as well as an occasional algae bloom at the surface. Mesotrophic lakes are usually good lakes for fishing, as they are able to support a wide variety of fish. In the late summer, the hypolimnion can become depleted in oxygen, which limits cold water fish and causes phosphorus cycling from the sediments. Mesotrophic Lakes have Secchi disc, phosphorus, and chlorophyll readings between those of eutrophic and oligotrophic lakes.

Eutrophic Lakes
Example of a Eutrophic LakeEutrophic Lakes are the most productive lakes, and thus support a very large biomass. These lakes are normally weedy and subject to frequent algae blooms yearly. There is often a large amount of accumulated organic matter on the bottom of the lake. Eutrophic lakes support large fish populations, however, rough fish, like carp, are common in these lakes. Eutrophic lakes are susceptible to oxygen depletion in the hypolimnion, and shallow eutrophic lakes may be vulnerable to winterkill situations. Eutrophic Lakes have low Secchi disc readings in relation to the depth of the lake, and high phosphorus and chlorophyll readings.
We have biologists and aquatic engineers at our disposal.
No need to look further than Gooneybird's LLC for the very best solution.

About Pond Aeration...By Daniel Spalding ©2006 All Rights Reserved
WHAT IS Fine Bubble Aeration?
Bubbles as small as .020" to .040" (.05 to 1mm) are created with a rubber membrane "diffuser" located in the bottom of the pond.  One cubic foot of air per minute can result in half a million of these tiny bubbles that form a rushing column of water upward to the surface. 

What good does "turning over the lake" do?  The primary thing it does is stabilize the dissolved oxygen ant temperature of the water from the surface to the bottom.  It also causes the body of water to lose its stratification of nutrients that feed algae and weeds that turn into organic muck on the bottom.
    Aerobic forms of bacteria (the good stuff) become dominant at the bottom and are kept alive and active by the continuous return of oxygenated water from the surface.  Fish now have the entire volume of the lake to live in instead of a narrow layer of oxygenated water.

What are some of the other benefits? Lets start with the water you drink!  Regardless of where your potable water comes from these days, it has to be treated to get rid of stuff that's not wanted when it comes out of your faucet.  If lake waters were aerated properly, most of the undesirable elements wouldn't be in the water, whether it is coming from a small municipal reservoir, a major river or a 20,000-acre reservoir.  We've seen aeration projects throughout the world that have tremendously improved their water supplies and reduced the cost of water treatment.  We've seen pork producers eliminate a multitude of problems by using aeration in their lakes and lagoons.  We've seen fisheries increase their production by a minimum of 300% in the same amount of water.

The bottom line?  All ponds and lakes built for beauty and function gradually turn into cesspools (eutrophic) during the natural aging process.  This technology reverses the aging process, renews the health, beauty and function of water bodies at a tiny fraction of the cost of doing it any other way.   GooneyWater™ Aeration is the key!

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All Prices throughout the website are subject to change without notice.  Gooneybird Sales LLC is Free Lance vendor of Pure Air and Lake Care Products.  GooneyAir™, GooneyWater™, LaGooney Systems™, and GooneyDredge™ are trademarks of Gooneybird Sales LLC, 710 Lawn St., Monroe City, MO 63456.  
573 248 6411 or 573 735 2527
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