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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>Joy B. Zedler</dc:contributor>
  <dc:creator>K. J. Werner</dc:creator>
  <dc:date>2002</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The expansion of urban and agricultural activities in watersheds of the Midwestern USA facilitates the conversion of species-rich sedge meadows to stands of&amp;nbsp;&lt;/span&gt;&lt;i&gt;Phalaris arundinacea&lt;/i&gt;&lt;span&gt;&amp;nbsp;and&amp;nbsp;&lt;/span&gt;&lt;i&gt;Typha&lt;/i&gt;&lt;span&gt;&amp;nbsp;spp. We document the role of sediment accumulation in this process based on field surveys of three sedge meadows dominated by&amp;nbsp;&lt;/span&gt;&lt;i&gt;Carex stricta&lt;/i&gt;&lt;span&gt;, their adjacent&amp;nbsp;&lt;/span&gt;&lt;i&gt;Phalaris&lt;/i&gt;&lt;span&gt;&amp;nbsp;or&amp;nbsp;&lt;/span&gt;&lt;i&gt;Typha&lt;/i&gt;&lt;span&gt;&amp;nbsp;stands, and transitions from&amp;nbsp;&lt;/span&gt;&lt;i&gt;Carex&lt;/i&gt;&lt;span&gt;&amp;nbsp;to these invasive species. The complex microtopography of&amp;nbsp;&lt;/span&gt;&lt;i&gt;Carex&lt;/i&gt;&lt;span&gt;&amp;nbsp;tussocks facilitates the occurrence of other native species. Tussock surface area and species richness were positively correlated in two marshes (r&lt;/span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;span&gt;=0.57 and 0.41); on average, a 33-cm-tall tussock supported 7.6 species.&amp;nbsp;&lt;/span&gt;&lt;i&gt;Phalaris&lt;/i&gt;&lt;span&gt;&amp;nbsp;also grew in tussock form in wetter areas but did not support native species. We found an average of 10.5&amp;nbsp;&lt;/span&gt;&lt;i&gt;Carex&lt;/i&gt;&lt;span&gt;&amp;nbsp;tussocks per 10-m transect, but only 3.5&amp;nbsp;&lt;/span&gt;&lt;i&gt;Phalaris&lt;/i&gt;&lt;span&gt;&amp;nbsp;tussocks. Microtopographic relief, determined with a high-precision GPS, measured 11% greater in&amp;nbsp;&lt;/span&gt;&lt;i&gt;Carex&lt;/i&gt;&lt;span&gt;&amp;nbsp;meadows than&amp;nbsp;&lt;/span&gt;&lt;i&gt;Phalaris&lt;/i&gt;&lt;span&gt;&amp;nbsp;stands. Inflowing sediments reduced microtopographic variation and surface area for native species. We calculated a loss of one species per 1000 cm&lt;/span&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;span&gt;&amp;nbsp;of lost tussock surface area, and loss of 1.2 species for every 10-cm addition of sediment over the sedge meadow surface. Alluvium overlying the sedge meadow soil had a smaller proportion of organic matter content and higher dry bulk density than the buried histic materials. We conclude that sedimentation contributes to the loss of native species in remnant wetlands.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1672/0277-5212(2002)022[0451:HSMSMA]2.0.CO;2</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Springer Link</dc:publisher>
  <dc:title>How sedge meadow soils, microtopography, and vegetation respond to sedimentation</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>