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OALib Journal期刊
ISSN: 2333-9721
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不同温度对3种海洋纤毛虫种群增长的影响
DOI: 10.3724/SP.J.1145.2010.00807, PP. 807-811
Keywords: 海洋纤毛虫,种群增长,增长率,温度系数,实验生态学
Abstract:
利用实验生态学方法探讨温度对3种海洋纤毛虫――缩原克鲁虫（protocruziacontrax）、拉氏游仆虫（euplotesraikovi）和中华游仆虫（e.sinica）纤毛虫种群增长的影响.纤毛虫采用米粒培养液培养，测定其在4个温度（17℃、22℃、27℃和32℃）下的密度变化，计算种群生态学参数（种群增长率和温度系数）.结果显示：1）拉氏游仆虫种群密度在27℃最大（2.73×103ind/ml），而缩原克鲁虫和中华游仆虫在22℃下最大（分别为1.58×104ind/ml和8.50×102ind/ml）；2）缩原克鲁虫和中华游仆虫在4种温度下的种群增长率大小顺序均为：32℃组>27℃组>22℃组>17℃组，而中华游仆虫的顺序为：22℃组>27℃组>32℃组>17℃组；3）3种纤毛虫的指数期长度均随培养温度的升高而变短；4）3种纤毛虫的温度系数（q10）的大小顺序为：中华游仆虫>拉氏游仆虫>缩原克鲁虫.结果表明，3种纤毛虫具有不同的最适宜的种群增长温度范围，缩原克鲁虫和拉氏游仆虫对高温的耐受范围较宽，在32℃下也能保持较高的种群增长率和密度；中华游仆虫温度范围较窄，在32℃和17℃下均不能进行正常的种群增长.图2表3参15
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