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Q: Lake nitrification ( No Answer,   1 Comment )
Question  
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.
Answer  
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:2 out of 5 stars
 
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.
&lt;a href=&quot;<a href="http://www.mare.su.se/Doc/MARE-annual2000.pdf">http://www.mare.su.se/Doc/MARE-annual2000.pdf</a>&quot;&gt;<a href="http://www.mare.su.se/Doc/MARE-annual2000.pdf">http://www.mare.su.se/Doc/MARE-annual2000.pdf</a>&lt;/a&gt; 
 
Lee Myung Ho has written a letter in which he speaks about the types
of Groundwater pollution. According to Lee,
&amp;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&amp;quot;
&lt;a href=&quot;<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>&quot;&gt;<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>&lt;/a&gt;
 
Check out this site to get more details about the effect of
temperature changes and changes in nutrient concentration on flora and
fauna.
&lt;a href=&quot;<a href="http://www.ipcc.ch/pub/tar/wg2/173.htm">http://www.ipcc.ch/pub/tar/wg2/173.htm</a>&quot;&gt;<a href="http://www.ipcc.ch/pub/tar/wg2/173.htm">http://www.ipcc.ch/pub/tar/wg2/173.htm</a>&lt;/a&gt; 
 
What are the effects of nitrogen enrichment can be found here: 
&lt;a href=&quot;<a href="http://www.ncl.ac.uk/gane/page12.htm">http://www.ncl.ac.uk/gane/page12.htm</a>&quot;&gt;<a href="http://www.ncl.ac.uk/gane/page12.htm">http://www.ncl.ac.uk/gane/page12.htm</a>&lt;/a&gt; 
 
A research was done to find out the effect of increase in nutrients on
Flora. Check out on this site:
&lt;a href=&quot;<a href="http://www.wetlandcare.com.au/wetland_research/res-flora.htm">http://www.wetlandcare.com.au/wetland_research/res-flora.htm</a>&quot;&gt;<a href="http://www.wetlandcare.com.au/wetland_research/res-flora.htm">http://www.wetlandcare.com.au/wetland_research/res-flora.htm</a>&lt;/a&gt; 
 
Search terms used : 
Eutrophication effect in lakes on Flora and Fauna 
&lt;a href=&quot;<a href="://www.google.com/search?hl=en&amp;amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna">://www.google.com/search?hl=en&amp;amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna</a>&quot;&gt;<a href="://www.google.com/search?hl=en&amp;amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna">://www.google.com/search?hl=en&amp;amp;q=Eutrophication+effect+in+lakes+on+Flora+and+Fauna</a>&lt;/a&gt;
 
effect of nitrate increase in lakes on Flora and Fauna 
&lt;a href=&quot;<a href="://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;amp;hl=en">://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;amp;hl=en</a>&quot;&gt;<a href="://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;amp;hl=en">://www.google.com/search?q=effect+of+nitrate+increase+in+lakes+on+Flora+and+Fauna&amp;amp;hl=en</a>&lt;/a&gt;
 
I hope this will help you. 
Regards.  

Request for Answer Clarification by bunny2-ga on 13 May 2002 17:05 PDT
Netcrazy, 
Thank you for the information on the effects of increased nitrate 
concentration on flora and fauna.  The 2000 MARE Report was very
helpful.
 
Lee Myung Ho's letter provided detailed information, but I 
am unclear as to his credentials and therefore the accuracy of the 
source.   
 
Most of the information you provided is about the effects of
nitrification (eutrophication).
 
I was looking for more scientific information on changes in nitrate
concentration due specifically to changes in temperature.  Although
you provided me with one link, I was hoping for more professional
journals that referenced actual experiments, data sets, university
affiliations etc.
 
If you can provide me with more scientific information regarding
nitrate concentration changes due to temperature changes, which
ultimately cause the effects you detailed, I'd appreciate it.
 
Thank you. 
Bunny2  

Clarification of Answer by netcrazy-ga on 15 May 2002 08:49 PDT
Hi, 
First of all, my apologies for the delay in answering your query. 
I checked out few more site to find the relation between the
temperature rise and the nitrate concentration in lakes. Many sites
mention that the rise in temperature will increase the process of
nitrification.
 
Check out this site : 
[&lt;a href=&quot;<a href="http://www.iii.to.cnr.it/pubblicaz/jl_59_1/JL59_1_index.htm">http://www.iii.to.cnr.it/pubblicaz/jl_59_1/JL59_1_index.htm</a>&quot;&gt;<a href="http://www.iii.to.cnr.it/pubblicaz/jl_59_1/JL59_1_index.htm">http://www.iii.to.cnr.it/pubblicaz/jl_59_1/JL59_1_index.htm</a>&lt;/a&gt;] There is
no specific mention in this Journal for the relation but it does talk
about the temperature changes and the changes in the con­centration of
many inlake solutes.
 
Also check this one too. 
&lt;a href=&quot;<a href="http://www.iii.to.cnr.it/pubblicaz/JL_58_1/jlindice.htm">http://www.iii.to.cnr.it/pubblicaz/JL_58_1/jlindice.htm</a>&quot;&gt;<a href="http://www.iii.to.cnr.it/pubblicaz/JL_58_1/jlindice.htm">http://www.iii.to.cnr.it/pubblicaz/JL_58_1/jlindice.htm</a>&lt;/a&gt; 
 
This site also talks about the link between temperature and nitrate
contents.
&lt;a href=&quot;<a href="http://www.ce.ufl.edu/~wrrc/rfp00.html">http://www.ce.ufl.edu/~wrrc/rfp00.html</a>&quot;&gt;<a href="http://www.ce.ufl.edu/~wrrc/rfp00.html">http://www.ce.ufl.edu/~wrrc/rfp00.html</a>&lt;/a&gt; 
 
This link will also help you in finding the relation. 
&lt;a href=&quot;<a href="http://www.utoronto.ca/env/jah/lim/lim05f99.htm">http://www.utoronto.ca/env/jah/lim/lim05f99.htm</a>&quot;&gt;<a href="http://www.utoronto.ca/env/jah/lim/lim05f99.htm">http://www.utoronto.ca/env/jah/lim/lim05f99.htm</a>&lt;/a&gt; 
 
Hope this will give you the exact info. 
 
Regards 
netcrazy  
Reason this answer was rejected by bunny2-ga:
He did not answer the question the first time.  I asked for
clarification, and he didn't answer a second time.  His answers could
have been better written, ie. include name of site with the link,
better spelling, grammar, etc.

If he was unable to find the answer, he could have said so, and I
would have accepted that without complaint.
bunny2-ga rated this answer:2 out of 5 stars
Netcrazy did not answer the question the first time, nor the second
time, after I requested clarification of his answer.

His answers would have been more useful if he included the names of
the sites with the links.

If he was unable to find the answer, he could have said so, and I
would have accepted that without complaint.

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!!

Comments  
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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