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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>Gerald L. Goddard</dc:contributor>
  <dc:contributor>D.R. Helsel</dc:contributor>
  <dc:contributor>Kevin L. MacKinnon</dc:contributor>
  <dc:creator>Dale M. Robertson</dc:creator>
  <dc:date>2009</dc:date>
  <dc:description>&lt;p&gt;A comprehensive &lt;span class="searchNone"&gt;rehabilitation&lt;/span&gt; plan was developed and implemented to shift &lt;span class="searchNone"&gt;Delavan&lt;/span&gt; &lt;span class="searchNone"&gt;Lake&lt;/span&gt;, Wisconsin, from a hypereutrophic to a mesotrophic condition. The plan was threefold: (1) reduce external phosphorus (P) loading by applying Best Management Practices in the watershed, enhance an existing wetland, and short-circuit the inflows through the &lt;span class="searchNone"&gt;lake&lt;/span&gt;, (2) reduce internal P loading by treating the sediments with alum and removing carp, and (3) &lt;span class="searchNone"&gt;rehabilitate&lt;/span&gt; the fishery by removing carp and bigmouth buffalo and adding piscivores (biomanipulation). The first and second parts of the plan met with only limited success. With only minor reductions in internal and external P loading, P concentrations in the &lt;span class="searchNone"&gt;lake&lt;/span&gt; returned to near pre-treatment concentrations. The intensive biomanipulation and resulting trophic cascade (increased piscivores, decreased planktivores, increased large zooplankton populations, and reduced phytoplankton populations) eliminated most of the original problems in the &lt;span class="searchNone"&gt;lake&lt;/span&gt; (blue-green algal blooms and limited water clarity). However, now there is extensive macrophyte growth and abundant filamentous algae. Without significantly reducing the sources of the problems (high P loading) in &lt;span class="searchNone"&gt;Delavan&lt;/span&gt; &lt;span class="searchNone"&gt;Lake&lt;/span&gt;, the increased water clarity may not last. With an improved understanding of the individual components of this &lt;span class="searchNone"&gt;rehabilitation&lt;/span&gt; program, better future management plans can be developed for &lt;span class="searchNone"&gt;Delavan&lt;/span&gt; &lt;span class="searchNone"&gt;Lake&lt;/span&gt; and other &lt;span class="searchNone"&gt;lakes&lt;/span&gt; and reservoirs with similar eutrophication problems.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1080/07438140009353961</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>The North American Lake Management Society</dc:publisher>
  <dc:title>Rehabilitation of Delavan Lake, Wisconsin</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>