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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>Luke A. Pangle</dc:contributor>
  <dc:contributor>Brent T. Aulenbach</dc:contributor>
  <dc:creator>Jeffrey W. Riley</dc:creator>
  <dc:date>2023</dc:date>
  <dc:description>&lt;div class="abstract-group"&gt;&lt;div class="article-section__content en main"&gt;&lt;p&gt;In environments with shallow water tables, vegetation may use groundwater to support transpiration (T&lt;sub&gt;G&lt;/sub&gt;). This process has been carefully studied in some arid climates but rarely in humid climates—even those with severe droughts and seasonal water deficits. As such, the role of T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;in humid-catchment hydrology is poorly constrained. We analysed water table fluctuations from nine monitoring wells along three transects in a second-order forested catchment to estimate T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;at plot and whole-riparian zone scales. Average T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;estimated around all well locations ranged from 1.06 to 4.95 mm d&lt;sup&gt;−1&lt;/sup&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;and did not change systematically as a function of distance from stream channel or with plot-scale tree basal area. Counter to some previous studies, we found that T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;was greater when the water table depth was deeper. Furthermore, the pattern of T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;with water table depth was not monotonic at all locations. The ratio of T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;to potential evapotranspiration tended to increase over the growing season, reflecting the progressive decrease in soil moisture storage and a greater reliance by vegetation on groundwater. Due to the lack of consistent spatial patterns in T&lt;sub&gt;G&lt;/sub&gt;, we explored the number of monitoring wells needed to consistently estimate average T&lt;sub&gt;G&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;within the 95% confidence bounds of the true mean. Based on this analysis, six or more wells were needed to consistently fall within the 95% confidence interval of the true mean. While this is based on the observed variability at a single site, it provides information for others considering this approach in similar upland forested catchments in humid regions.&lt;/p&gt;&lt;/div&gt;&lt;/div&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1002/eco.2520</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Wiley</dc:publisher>
  <dc:title>Evaluating the spatial and temporal variability of groundwater uptake by riparian vegetation in a humid southeastern US catchment</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>