6 Responses to “IN PONDS OR LAKES: What decreases the oxygen content more live aquatic plants, or decomposing aquatic plants?”

1. La-di-da! Says:
   February 6th, 2010 at 10:47 am

   Whats the difference between the two?
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2. Annie Fannie Says:
   February 6th, 2010 at 11:08 am

   I would think the live plants in the water would give off oxygen.
   I don’t know anything about ‘Rodeo’, but if you’re concerned about the fish I hope it won’t hurt them, too.
   Good Luck!!
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3. Bozema Says:
   February 6th, 2010 at 11:20 am

   It would decrease oxygen because of the breakdown of the organic material (possibly creating the black sludge) and also because there would be less vegetative cover, the water temperature would rise.

   Rodeo is the aquatic form of Round-up and won’t hurt fish but the lack of oxygenation by loss of vegetation and increased water temperature might kill them.
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4. drummer158 Says:
   February 6th, 2010 at 12:10 pm

   As in the fresh open air we breathe water has the same problem . If there is no green plants there will be no oxygen . The air we breathe is loaded with oxygen because of greenery and greenery needs CO2 to survive. The greenery takes in the CO2 as we take in oxygen and it gets turned into oxygen .I remember yrs ago the state deoxygenated the lake I was living on and killed all the fish and I guess some of the plant life.They did this to repopulate the lake with nothing but trout. If I remember correctly the last time I visited the lake there were hatchlings of pickeral,bass,and other pan fish. So they made a come back. The only way to destroy the life in a pond or lake is to completely drain it and not let it fill anymore.
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5. Dan V Says:
   February 6th, 2010 at 12:25 pm

   Plants don’t decrease the O2 saturation of the water, they increase it. They also use substances that are toxic to fish as nutrients – a definite benefit.

   Decomposing plant matter will lower available O2 because of the aerobic bacterial activity involved in decomposition – among other things of course.

   Another consideration in eradicating plant life from a body of water is the impact on water temperatures. Depending on the size, etc of the pond or whatever, it could allow an increase in temperature in the summer – and warmer water can carry less O2 than cooler water.

   Removal of plant life can also impact natural food sources that may be present.

   Radical changes to any ecosystem can have a lot of unintended consequences.
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6. BIGgourami Says:
   February 6th, 2010 at 12:54 pm

   do any of you guys have a pond?

   excessive plant growth will cut off circulation which is a MUH bigger aerator than the plants ever will be.. once the fish die (wil happen before the plants) the pond goes stagnant and without any CO2 (from the fish) the plants will eventually die…

   i’ve never tryed any product (this is basically and algeacide/herbicide) on my pond, im just a little parranoid about side effects (DEET, DDT, etc)

   i usualy manually remove excess growth/detritus…

   the decomposing waste will lower the pH which i believe does effect O2 content.. but both are bad..
   black sludge is creted by and supports anaerobic bacterial functions, giving it that rotten egg odor… stagnant water caused by overcrowded plants is one cause of it.

   if this is for a private pond, keep good circulation on the pond preferably with a filter not just a pump, and remove excess growth as needed..

   if this is for a business and are researching fro a product to use, i’d check with the EPA database, you should be able to find a link to that on their site

   http://www.epa.org/search/redirect.php?f=http%3A%2F%2Fwww.google.com%2Faclk%3Fsa%3Dl%26ai%3DBooLa9DEWSKTtE46s-wKjxOwb3s_yPvSbsuUC4sOGwwaw6gEQAhgCIKywhAwoAjgBUJ_AlMD______wFgye6DiPCj7BKgAYv9jP8DsgEHZXBhLm9yZ8gBAdoBB2VwYS5vcmfZA4VBwyx1M5d69QNAAAAA%26num%3D2%26sig%3DAGiWqtyhL3y48t5js_yBaHuGto_Hj7vBug%26q%3Dhttp%3A%2F%2Fwww.forestry-suppliers.com%2FPromo%2Fgoogle.asp%253Fid%253D71&l=YjFmMGY2ZDhjODIxNTgxMmMwYjcwOWU5Y2FlNDUzM2IJMC4xMDY5MgkxMDAwCTEzCTEJMAkJMgkyCTEJOWUyNjIxMGQ3NTEyMWNhNTE4NWNlOTJiOWY5ZDBlZmUJd3d3LkZvcmVzdHJ5LVN1cHBsaWVycy5jb20JMjE4MDM0ODUJcwkwCTAJNAlyb2RlbyBoZXJiaWNpZGUJNDkJMQk1CTU5CTAJMC4wOTAwCU4JMjU0CWU2ZDJmNTIwNjAyZmYzNTAyZWYyMzk4YmRiYTY1NWZlCTAJMAkwCQkwLjEwNTE2NQkJCTI3NAkJ
   http://www.pronto.com/user/search.do?displayQuery=rodeo%20herbicide&SEM=true&query=rodeo%20herbicide&adid=1196561088-1804908d-0_gs&ref=rodeo%20herbicide&creativeid=856295045&site=&loadingComplete=true
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