<?xml version='1.0' encoding='utf-8'?>
<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>G.T. Auble</dc:contributor>
  <dc:contributor>P.B. Shafroth</dc:contributor>
  <dc:contributor>M. L. Scott</dc:contributor>
  <dc:contributor>M.F. Merigliano</dc:contributor>
  <dc:contributor>M.D. Freehling</dc:contributor>
  <dc:contributor>E.R. Griffin</dc:contributor>
  <dc:creator>Jonathan M. Friedman</dc:creator>
  <dc:date>2005</dc:date>
  <dc:description>&lt;p&gt;Concern about spread of non-native riparian trees in the western USA has led to Congressional proposals to accelerate control efforts. Debate over these proposals is frustrated by limited knowledge of non-native species distribution and abundance. We measured abundance of 44 riparian woody plants at 475 randomly selected stream gaging stations in 17 western states. Our sample indicates that &lt;i class="EmphasisTypeItalic "&gt;Tamarix ramosissima&lt;/i&gt; and &lt;i class="EmphasisTypeItalic "&gt;Elaeagnus angustifolia&lt;/i&gt; are already the third and fourth most frequently occurring woody riparian plants in the region. Although many species of &lt;i class="EmphasisTypeItalic "&gt;Tamarix&lt;/i&gt; have been reported in the region, &lt;i class="EmphasisTypeItalic "&gt;T. ramosissima&lt;/i&gt; (here including &lt;i class="EmphasisTypeItalic "&gt;T. chinensis&lt;/i&gt; and hybrids) is by far the most abundant. The frequency of occurrence of &lt;i class="EmphasisTypeItalic "&gt;T. ramosissima&lt;/i&gt; has a strong positive relation with the mean annual minimum temperature, which is consistent with hypothesized frost sensitivity. In contrast the frequency of occurrence of &lt;i class="EmphasisTypeItalic "&gt;E. angustifolia&lt;/i&gt; decreases with increasing minimum temperatures. Based on mean normalized cover, &lt;i class="EmphasisTypeItalic "&gt;T. ramosissima&lt;/i&gt; and &lt;i class="EmphasisTypeItalic "&gt;E. angustifolia&lt;/i&gt; are the second and fifth most dominant woody riparian species in the western USA. The dominance of &lt;i class="EmphasisTypeItalic "&gt;T. ramosissima&lt;/i&gt; has been suspected for decades; the regional ascendance of &lt;i class="EmphasisTypeItalic "&gt;E. angustifolia&lt;/i&gt;, however, has not previously been reported.&lt;br data-mce-bogus="1"&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1007/s10530-004-5849-z</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Springer</dc:publisher>
  <dc:title>Dominance of non-native riparian trees in western USA</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>