Annual variation of species richness and lorica oral diameter characteristics of tintinnids in a semi-enclosed bay of western Pacific
Annual variation of species richness and lorica oral diameter characteristics of tintinnids in a semi-enclosed bay of western Pacific
复制标题
西太平洋半封闭海湾丁丁科动物物种丰富度及lorica口径特征的年际变化
DOI：
10.1016/j.ecss.2018.04.003
复制
发表时间：
2018-07-31
影响因子：
2.8
通讯作者：
Liang, Jun
中科院分区：
文献类型：
--
作者：
Feng, Meiping;Wang, Chaofeng;Liang, Jun
关于丁丁科动物组合的年度变化已经有很多文章，尽管导致年度变化的机制无论是在物种丰富度还是洛里卡口直径（LOD）大小类别方面都还没有得到很好的研究。本研究在西太平洋胶州湾对丁丁纤毛虫的物种发生、丰度和LOD变化进行了为期10年（2003年5月至2012年12月）的调查。与之前的研究相反，我们发现胶州湾丁丁科动物物种丰富度在夏季达到峰值，并经过多年调查得到验证。我们研究了每个丁丁科物种的音韵学，并探讨了造成年度变化的机制。假设认为，丁丁科动物物种丰富度有一个冬季基线，随着季节的进展，暖水物种的数量会增加。我们定义了每个物种的发生类型，发现只有一种寒冷发生类型物种。冬夏过渡期冷发生型与暖发生型不存在重叠。本研究的第二个目的是以 LOD 和冗余物种的形式探索丁丁科动物组合的年度变化。 LOD大小类别之间的物种频率分布模式全年相似。 LOD大小等级丰度频率分布格局除5月和9月外可分为冷相和暖相两个阶段。各月冗余物种比例约为50%。我们的结果有助于了解和预测世界海洋中丁丁科动物组合在物种丰富度和 LOD 方面的年度变化。
Much has been written on annual variation of tintinnid assemblages although the mechanism causing the annual variation has been poorly studied either in form of species richness or Lorica Oral Diameter (LOD) size-classes. In the present study, a 10-year (May 2003 to December 2012) survey on species occurrence, abundance, and LOD variation of the tintinnid ciliates was conducted in Jiaozhou Bay, western Pacific. In contrast to previous studies, we found summer peaks in tintinnid species richness in Jiaozhou Bay validated by multi-year investigations. We studied phonology of every tintinnid species and explored the mechanism causing the annual variation. The hypothesis was that tintinnid species richness has a winter baseline, to which warm water species added with the progress of the season. We defined the occurrence types of each species, and found there was only one cold occurrence type species. There was no overlap of cold occurrence type and warm occurrence type in the transitional period between winter and summer. The second aim of this study was to explore annual variations in tintinnid assemblages in form of LOD and redundant species. The species frequency distribution patterns among LOD size-classes were similar all year round. The abundance frequency distribution pattern in LOD size-classes could be divided into two phases: cold phase and warm phase with exception of May and September. The portion of redundant species was about 50% in every month. Our result help understand and predict annual variation of tintinnid assemblages in terms of species richness and LOD in world oceans.