<?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:creator>James E. Cloern</dc:creator>
  <dc:date>1977</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Specific growth rate of&amp;nbsp;&lt;/span&gt;&lt;i&gt;Cryptomonas ovata&lt;/i&gt;&lt;span&gt;&amp;nbsp;var.&amp;nbsp;&lt;/span&gt;&lt;i&gt;palustris&lt;/i&gt;&lt;span&gt;&amp;nbsp;Pringsheim was measured in batch culture at 14 light-temperature combinations. Both the maximum growth rate (&amp;mu;&lt;/span&gt;&lt;sub&gt;m&lt;/sub&gt;&lt;span&gt;) and optimum light intensity&amp;nbsp;&lt;/span&gt;&lt;i&gt;(I&lt;sub&gt;opt&lt;/sub&gt;)&lt;/i&gt;&lt;span&gt;&amp;nbsp;fit an empirical function that increases exponentially with temperature up to an optimum&amp;nbsp;&lt;/span&gt;&lt;i&gt;(T&lt;sub&gt;opt&lt;/sub&gt;),&lt;/i&gt;&lt;span&gt;&amp;nbsp;then declines rapidly as temperature exceeds&amp;nbsp;&lt;/span&gt;&lt;i&gt;T&lt;sub&gt;opt&lt;/sub&gt;.&lt;/i&gt;&lt;span&gt;&amp;nbsp;Incorporation of these functions into Steele's growth equation gives a good estimate of specific growth rate over a wide range of temperature and light intensity. Rates of phosphate, ammonium and nitrate uptake were measured separately at 16 combinations of irradiance and temperature and following a spike addition of all starved cells initially took up nutrient at a rapid rate. This transitory surge was followed by a period of steady, substrate-saturated uptake that persisted until external nutrient concentration fell. Substrate-saturated NO&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;sup&gt;&amp;minus;&lt;/sup&gt;&lt;span&gt;-uptake proceeded at very slow rates in the dark and was stimulated by both increased temperature and irradiance; NH&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt;&lt;span&gt;-uptake apparently proceeded at a basal rate at 8 and l4 C and was also stimulated by increased temperature and irradiance. Rates of NH&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;&amp;minus;&lt;/sup&gt;&lt;span&gt;-uptake were much higher than NO&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;sup&gt;&amp;minus;&lt;/sup&gt;&lt;span&gt;-uptake at all light-temperature combinations. Below 20 C, PO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;&amp;minus;3&lt;/sup&gt;&lt;span&gt;-uptake was more rapid in dark than in light, but was light enhanced at 26 C.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1111/j.1529-8817.1977.tb02947.x</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Wiley</dc:publisher>
  <dc:title>Effects of light intensity and temperature on &lt;i&gt;Cryptomonas ovata&lt;/i&gt; (Cryptophyceae) growth and nutrient uptake rates</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>