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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>Elizabeth J. DeLorenze</dc:contributor>
  <dc:contributor>Andrew T Giguere</dc:contributor>
  <dc:contributor>David A. Pyke</dc:contributor>
  <dc:contributor>Peter J. Bottomley</dc:contributor>
  <dc:creator>Nicole DeCrappeo</dc:creator>
  <dc:date>2017</dc:date>
  <dc:description>&lt;div id="ASec1" class="AbstractSection"&gt;&lt;p class="Heading"&gt;&lt;strong&gt;Aim&lt;/strong&gt;&lt;/p&gt;&lt;p id="Par1" class="Para"&gt;There is interest in determining how cheatgrass (&lt;i class="EmphasisTypeItalic "&gt;Bromus tectorum&lt;/i&gt; L.) modifies N cycling in sagebrush (&lt;i class="EmphasisTypeItalic "&gt;Artemisia tridentata&lt;/i&gt; Nutt.) soils of the western USA.&lt;/p&gt;&lt;/div&gt;&lt;div id="ASec2" class="AbstractSection"&gt;&lt;p class="Heading"&gt;&lt;strong&gt;Methods&lt;/strong&gt;&lt;/p&gt;&lt;p id="Par2" class="Para"&gt;To gain insight into the roles of fungi and bacteria in N cycling of cheatgrass-invaded and uninvaded sagebrush soils, the fungal protein synthesis inhibitor, cycloheximide (CHX), and the bacteriocidal compound, bronopol (BRO) were combined with a &lt;sup&gt;15&lt;/sup&gt;NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; isotope pool dilution approach.&lt;/p&gt;&lt;/div&gt;&lt;div id="ASec3" class="AbstractSection"&gt;&lt;p class="Heading"&gt;&lt;strong&gt;Results&lt;/strong&gt;&lt;/p&gt;&lt;p id="Par3" class="Para"&gt;CHX reduced gross N mineralization to the same rate in both sagebrush and cheatgrass soils indicating a role for fungi in N mineralization in both soil types. In cheatgrass soils BRO completely inhibited gross N mineralization, whereas, in sagebrush soils a BRO-resistant gross N mineralization rate was detected that was slower than CHX sensitive gross N mineralization, suggesting that the microbial drivers of gross N mineralization were different in sagebrush and cheatgrass soils. Net N mineralization was stimulated to a higher rate in sagebrush than in cheatgrass soils by CHX, implying that a CHX inhibited N sink was larger in the former than the latter soils. Initial gross NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; consumption rates were reduced significantly by both CHX and BRO in both soil types, yet, consumption rates recovered significantly between 24 and 48&amp;nbsp;h in CHX-treated sagebrush soils. The recovery of NH&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; consumption in sagebrush soils corresponded with an increase in the rate of net nitrification.&lt;/p&gt;&lt;/div&gt;&lt;div id="ASec4" class="AbstractSection"&gt;&lt;p class="Heading"&gt;&lt;strong&gt;Conclusions&lt;/strong&gt;&lt;/p&gt;&lt;p id="Par4" class="Para"&gt;These results suggest that cheatgrass invasion of sagebrush soils of the northern Great Basin reduces the capacity of the fungal N consumption sink, enhances the capacity of a CHX resistant N sink and alters the contributions of bacteria and fungi to gross N mineralization.&lt;/p&gt;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1007/s11104-017-3209-x</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Springer</dc:publisher>
  <dc:title>Fungal and bacterial contributions to nitrogen cycling in cheatgrass-invaded and uninvaded native sagebrush soils of the western USA</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>