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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>Eric R. Larson</dc:contributor>
  <dc:contributor>Andrew D. Walker</dc:contributor>
  <dc:contributor>Annika W. Walters</dc:contributor>
  <dc:creator>Braxton Newkirk</dc:creator>
  <dc:date>2023</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Crayfish have experienced extensive assemblage reorganization as a result of global change, with some species becoming globally invasive and others becoming rare or extinct. We combined historical and contemporary sampling data to determine temporal trends of crayfish assemblages of Wyoming, USA, identifying winners and losers over a ½ century of change (1969–2020). We first documented range expansions of several species, including the Virile Crayfish&amp;nbsp;&lt;/span&gt;&lt;i&gt;Faxonius virilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;(Hagen, 1870), Ringed Crayfish&amp;nbsp;&lt;/span&gt;&lt;i&gt;Faxonius neglectus&lt;/i&gt;&lt;span&gt;&amp;nbsp;(Faxon, 1885), and Rusty Crayfish&amp;nbsp;&lt;/span&gt;&lt;i&gt;Faxonius rusticus&lt;/i&gt;&lt;span&gt;&amp;nbsp;(Girard, 1852) as well as range contractions of the Calico Crayfish&amp;nbsp;&lt;/span&gt;&lt;i&gt;Faxonius immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;(Hagen, 1870) and Pilose Crayfish&amp;nbsp;&lt;/span&gt;&lt;i&gt;Pacifastacus gambelii&lt;/i&gt;&lt;span&gt;&amp;nbsp;(Girard, 1852). We then used multispecies occupancy models to investigate potential mechanisms behind the replacement of&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;by&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. virilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;as the most commonly detected crayfish species in Wyoming over time. We hypothesized that&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. virilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;is more likely to competitively displace&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;from more permanent waterbodies, whereas&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;is more likely to persist in more ephemeral habitats because of its superior burrowing ability and tolerance of low dissolved oxygen concentrations. Our occupancy models supported this prediction, with&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;occupancy declining at more permanent sites in the presence of&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. virilis&lt;/i&gt;&lt;span&gt;, but&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. immunis&lt;/i&gt;&lt;span&gt;&amp;nbsp;occupancy was unaffected by&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. virilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;in less permanent sites. We also found positive associations of&amp;nbsp;&lt;/span&gt;&lt;i&gt;F. virilis&lt;/i&gt;&lt;span&gt;&amp;nbsp;occupancy and detection probability with water temperature, suggesting that warmer streams may be more vulnerable to new invasions or spread by this species in nonnative regions of western North America. Our results highlight the value of regular, statewide crayfish surveys through documenting substantial changes in Wyoming’s crayfish assemblage structure that may be driven by habitat-mediated competitive interactions.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1086/725318</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>University of Chicago Press</dc:publisher>
  <dc:title>Winners and losers over a ½ century of change in crayfish assemblages of Wyoming, USA</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>