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Subject:
Lake nitrification
Category: Science > Chemistry Asked by: bunny2-ga List Price: $15.00 |
Posted:
12 May 2002 19:17 PDT
Expires: 10 Jun 2002 11:03 PDT Question ID: 15398 |
I am looking for scientific journal evidence which indicates that increased nitrate concentration in lake water due to a rise in ambient temperature has an effect on local flora and fauna. I am looking for several sources with detailed information on these effects. |
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There is no answer at this time. |
The following answer was rejected by the asker (they received a refund for the question). | |
Subject:
Re: Lake nitrification
Answered By: netcrazy-ga on 13 May 2002 08:04 PDT Rated: |
Hi bunny2-ga, The phenomenon of over-enrichment of water by so-called nutrients, principally nitrate and phosphate, is known as Eutrophication. Eutrophication is of primary concern in lake waters, its effects are becoming more pronounced in rivers too. These include greatly increased weed growth, leading to blockage of channels, siltation, and, in some cases, to deoxygenation. The process results from the enrichment of surface waters by nutrients (including Nitrates), leading to algal blooms, which may be toxic and consume large amounts of oxygen when decaying. Check out MARE Annual 2000 report on the effect of Eutrophication on flora and fauna. <a href="<a href="http://www.mare.su.se/Doc/MARE-annual2000.pdf">http://www.mare.su.se/Doc/MARE-annual2000.pdf</a>"><a href="http://www.mare.su.se/Doc/MARE-annual2000.pdf">http://www.mare.su.se/Doc/MARE-annual2000.pdf</a></a> Lee Myung Ho has written a letter in which he speaks about the types of Groundwater pollution. According to Lee, &quot;Food-processing effluents are often high in nitrate and phosphate, and in agricultural areas runoff from land carries nutrients into the water, especially if artificial fertilizers are used. Many agricultural and forestry practices lead to increased soil erosion, carrying plant nutrients from the land to the water. Intensive rearing of livestock contributes significant nutrient loads to surface waters.Excessive plant growth causes adverse consequences. Respiration of dense plant growth can produce depressed dissolved oxygen levels, not only at night when photosynthesis ceases but also during the day if the density of plant growth reduces light penetration&quot; <a href="<a href="http://www.ruthvilmi.net/hut/Project/Autumn95/environment/team_3_2.html">http://www.ruthvilmi.net/hut/Project/Autumn95/environment/team_3_2.html</a>"><a href="http://www.ruthvilmi.net/hut/Project/Autumn95/environment/team_3_2.html">http://www.ruthvilmi.net/hut/Project/Autumn95/environment/team_3_2.html</a></a> Check out this site to get more details about the effect of temperature changes and changes in nutrient concentration on flora and fauna. <a href="<a href="http://www.ipcc.ch/pub/tar/wg2/173.htm">http://www.ipcc.ch/pub/tar/wg2/173.htm</a>"><a href="http://www.ipcc.ch/pub/tar/wg2/173.htm">http://www.ipcc.ch/pub/tar/wg2/173.htm</a></a> What are the effects of nitrogen enrichment can be found here: <a href="<a href="http://www.ncl.ac.uk/gane/page12.htm">http://www.ncl.ac.uk/gane/page12.htm</a>"><a href="http://www.ncl.ac.uk/gane/page12.htm">http://www.ncl.ac.uk/gane/page12.htm</a></a> A research was done to find out the effect of increase in nutrients on Flora. Check out on this site: <a href="<a href="http://www.wetlandcare.com.au/wetland_research/res-flora.htm">http://www.wetlandcare.com.au/wetland_research/res-flora.htm</a>"><a href="http://www.wetlandcare.com.au/wetland_research/res-flora.htm">http://www.wetlandcare.com.au/wetland_research/res-flora.htm</a></a> Search terms used : Eutrophication effect in lakes on Flora and Fauna <a href="<a href="://www.google.com/search?hl=en&amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna">://www.google.com/search?hl=en&amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna</a>"><a href="://www.google.com/search?hl=en&amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna">://www.google.com/search?hl=en&amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna</a></a> effect of nitrate increase in lakes on Flora and Fauna <a href="<a href="://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;hl=en">://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;hl=en</a>"><a href="://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;hl=en">://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;hl=en</a></a> I hope this will help you. Regards. | |
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The following answer was rejected by the asker (they received a refund for the question). | |
Subject:
Re: Lake nitrification
Answered By: leslie-ga on 18 May 2002 16:59 PDT |
Hello Bunny2, You were looking for journal articles and studies which looked at the effects of increased nitrate concentration in lake water due to a rise in ambient temperature on local flora and fauna. I limited my search to academic journals, so you will have to visit your local university or college to look for these articles. However, I am sure you will agree that when looking for legitimate scientific information, the library is the last word. Here are the titles I think will be of the most help to you. 1. Nutrients and their impact on the Canadian environment, Patricia Chambers [et al.]. Ottawa : Environment Canada, 2001C 2. The impact of nitrogen deposition on natural and semi-natural ecosystems / edited by Simon J. Langan, Environmental pollution ; v. 3, Dordrecht : Boston : Kluwer Academic, c1999 3. Nitrogen fertilization in the environment / edited by Peter Edward Bacon New York : M. Dekker, 1995 4. (this one is particularily good) Growth rate and biomass responses of periphytic algae to nutrient enrichment of stable and unstable substrata, Athabasca River Northern River Basins Study (Canada). Edmonton : Northern River Basins Study, 1995. 5. Nitrogen mass balances and denitrification rates in Central Ontario lakes / report prepared by Lewis A. Molot and Peter J. Dillon [Toronto] : Queen's Printer for Ontario, 1993. 6. (As a general reference) Nitrogen fixation / John Postgate, Cambridge, U.K. ; New York, NY, USA : Cambridge University Press, 1998, 3rd ed. I am lucky enough to live in a town with two excellent universities, and so if you have trouble finding these articles, or other specific pieces, please contact me and I may be able to send you photocopies. Good luck, and I hope this has been of assistance. Leslie-ga |
Reason this answer was rejected by
bunny2-ga:
I originally requested a refund, and the question was reposted instead. If the system has been fixed, please process my refund request now. Thanks!! |
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Subject:
Re: Lake nitrification
From: fly41-ga on 13 May 2002 05:21 PDT |
Hi, Just to get you started, there is an interesting site by the U.S. Geological Survey at http://wa.water.usgs.gov/ccpt/pubs/ofr-95-445.html . Not only is this interesting, but it has some references that may be what you are looking for at the end of the page. Good Luck!! Fly |
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