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Preliminary study on community structures of meiofauna in the middle and eastern Chukchi Sea

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  • Marine Biology
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Abstract

Sediment core samples were collected from 17 stations in the middle and eastern Chukchi Sea during the sixth Chinese National Arctic Research Expedition (CHINARE-Arctic) in summer 2014. The samples were analyzed for composition, abundance, biomass, vertical distribution, size spectra, and ecological indexes of meiofauna. A total of 14 meiofauna taxa were detected, and the free-living marine nematodes comprised the most dominant taxon, accounting for 97.21% of the average abundance. The abundance and biomass of meiofauna were within ranges of (218.12±85.83)−(7 239.38±1 557.15) ind./(10 cm2) and (130.28±52.17)−(3 309.56±1 751.80) μg/(10 cm2), with average values of (2 391.90±1 966.19) ind./(10 cm2) and (1 549.73±2 042.85) μg/(10 cm2) (according to dry weight) respectively. Furthermore, 91.26% of the individuals were distributed in the top layer of 0–5 cm of surface sediment, and 90.84% had sizes of 32–250 μm. Group diversity index of meiofauna in the survey area was low, and the variation of abundance was the main difference in meiofauna communities among all stations. Abundance and biomass of meiofauna were not significantly correlated with environmental factors except concentration of nutrient Si in bottom seawater. Abundance of meiofauna in shallow water of marginal seas in the Pacific sector of the Arctic Ocean is likely at a same level and higher than that in most of China sea areas, suggesting that the shallow water of the summer Chukchi Sea is a continental shelf area with rich resources of meiofauna. The Chukchi Sea is important for studying the ecosystem of the Arctic Ocean and environmental responses. However, studies on meiofauna in the Chukchi Sea are still not enough, and in the future, natural and human disturbances may increase due to global warming, the Arctic channel opening, and other factors. Thus, more studies on meiofauna should be required, in order to know more about how the Arctic benthic community would alter.

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Acknowledgements

We sincerely thank the crew of the sixth Chinese National Arctic Research Expedition for collecting the samples. The environmental data were issued by the Resource-sharing Platform of Polar Samples (http://birds.chinare.org.cn), and maintained by the Polar Research Institute of China (PRIC) and Chinese National Arctic and Antarctic Data Center (CN-NADC).

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Authors and Affiliations

  1. Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, 361005, China

    Dingyong Huang, Jianjia Wang, Qianhui Zeng, Jiaguang Xiao, Peng Tian, Feng Guo & Wentao Niu

  2. Ocean College, Shandong University, Weihai, 264209, China

    Qianhui Zeng

  3. Key Laboratory of the Coastal and Wetland Ecosystem of Ministry of Education, Xiamen University, Xiamen, 361005, China

    Sujing Fu

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  1. Dingyong Huang
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Correspondence to Wentao Niu.

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Foundation item

The National Youth Science Fund under contract No. 41606207; the National Natural Science Foundation of China under contract No. 41876176; the Chinese Polar Environment Comprehensive Investigation and Assessment Programs under contract No. CHINARE2013-03-05.

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Huang, D., Wang, J., Zeng, Q. et al. Preliminary study on community structures of meiofauna in the middle and eastern Chukchi Sea. Acta Oceanol. Sin. 40, 83–91 (2021). https://doi.org/10.1007/s13131-021-1777-3

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