Spatial distribution of planktonic ciliates in the western Pacific Ocean: along the transect from Shenzhen (China) to Pohnpei (Micronesia)
Spatial distribution of planktonic ciliates in the western Pacific Ocean: along the transect from Shenzhen (China) to Pohnpei (Micronesia)
复制标题
西太平洋浮游纤毛虫的空间分布：沿深圳（中国）至波纳佩岛（密克罗尼西亚）的横断面
DOI：
10.1007/s42995-020-00075-7
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发表时间：
2021-02-01
影响因子：
5.7
通讯作者：
Xu, Dapeng
中科院分区：
文献类型：
--
作者：
Huang, Hungchia;Yang, Jinpeng;Xu, Dapeng
浮游纤毛虫是浮游生态系统中微型和微型浮游生物的主要消费者，在微生物循环中的物质和能量转移中发挥着关键作用。然而，由于识别的困难，纤毛虫组合的物种组成，特别是对于通常占优势的海洋沃茨纤毛虫群落的小，脆弱，裸露的物种，仍然在很大程度上是未知的。在本研究中，沿着从深圳（中国）到波恩佩（密克罗尼西亚）的样带的22个站点采样的微型浮游生物和nanoflagellates计数。此外，色素分析的主要浮游植物群体沿着与环境变量的测量，包括温度，盐度和营养盐也进行了。采用定量蛋白银染色法对浮游纤毛虫进行了种级鉴定，揭示了浮游纤毛虫的种类组成和分布格局。纤毛虫丰度与磷酸盐、硅酸盐和皮尺寸色素真核生物（PPE）呈正相关，而生物量与PPE、异养纳米鞭毛虫和绿藻密切相关。硅酸盐和色素nanoflagellates的组合被确定为驱动纤毛虫群落组成的主要因素。硅酸盐和纤毛虫丰度与群落结构之间的密切关系需要根据更多的海洋沃茨数据进一步验证。我们的研究表明，在未来的纤毛虫研究中，使用技术，可以揭示更高的分类分辨率的群落组成的必要性。
Planktonic ciliates have been recognized as major consumers of nano- and picoplankton in pelagic ecosystems, playing pivotal roles in the transfer of matter and energy in the microbial loop. However, due to the difficulties in identification, the species composition of ciliate assemblages, especially for the small, fragile, and naked species that usually dominate the ciliate communities in the oceanic waters, remains largely unknown. In the present study, 22 stations along the transect from Shenzhen (China) to Pohnpei (Micronesia) were sampled for the enumeration of picoplankton and nanoflagellates. In addition, pigment analysis of major phytoplankton groups along with the measurements of environmental variables including temperature, salinity, and nutrients were also carried out. Ciliates were identified at species level using quantitative protargol stain to reveal the species composition and their distribution patterns from off-shore to open ocean. Ciliate abundance was positively correlated with phosphate, silicate, and pico-sized pigmented eukaryotes (PPEs), whereas the biomass was closely related with PPEs, heterotrophic nanoflagellates, and chlorophytes. The combination of silicate and pigmented nanoflagellates was identified as the major factor driving the ciliate community composition. The close relationship between silicate and ciliate abundance and community structure needs further validation based on more data collected from oceanic waters. Our study showed the necessity of using techniques that can reveal the community composition at higher taxonomic resolutions in future studies on ciliates.