三亚湾近岸浮游纤毛虫群落的昼夜变化特征*

doi:10.11978/2016034

Abstract

Abstract:

Planktonic ciliates are widespread micro-zooplankton in marine ecosystem and are considered as a key link between microbial loop and classic food chain as they play important roles in transfer processes of material and energy in the ecosystem. To better understand the distribution and ecological function of planktonic ciliates in tropical ecosystem, ciliate samples were collected in the coastal waters of Sanya Bay at 6:00, 12:00, 18:00 and 24:00, respectively, in April 2014. Species diversity and community structure of ciliate from different times were analyzed by molecular detection based on species-specific primers. The results were as follows. 1) Planktonic ciliate showed high diversity, with about 79 operational taxonomic units (OTUs) detected. 2) Significant variation of species diversity was uncovered at different times during a day, showing a decrease trend in day time but increase trend at night time and the order was morning [48 OUTs(operational taxonomic units)] > night (37 OTUs) > evening (32 OTUs) >midday (29 OTUs). The reason may be that different ciliate populations have different distribution modes.

Key words: Sanya Bay, planktonic ciliates, diversity, diel variation

Youjun WANG, Cuilian XU, Simin HU, Tao LI, Sheng LIU. Diel variation of community structure of planktonic ciliates in coastal ecosystem of Sanya Bay[J].Journal of Tropical Oceanography, 2017, 36(1): 72-80.

Figures/Tables 7

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References 35

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	Chl a含量/(μg∙L^-1)	POM/(mg∙L^-1)
早晨(6:00)	0.76	1.05
中午(12:00)	0.80	0.63
傍晚(18:00)	2.09	1.10
夜晚(24:00)	6.69	1.43

	送测克隆数	有效克隆数	辛普森指数	香农-威纳指数
早晨(6:00)	90	85	0.9686	3.685
中午(12:00)	70	63	0.9393	3.073
傍晚(18:00)	80	70	0.9359	3.107
夜晚(24:00)	80	77	0.9489	3.325
合计	320	295	---	---

Diel variation of community structure of planktonic ciliates in coastal ecosystem of Sanya Bay

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