Journal of Marine Sciences ›› 2023, Vol. 41 ›› Issue (2): 104-113.DOI: 10.3969/j.issn.1001-909X.2023.02.009

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Geographical distribution pattern of deep-sea benthic polychaetes in the western Pacific

WANG Yueyun1,2(), YAN Runxuan1,2,3, WANG Chunsheng1,2,*()   

  1. 1. Key Laboratory of Marine Ecosystem Dynamics, MNR, Hangzhou 310012, China
    2. Second Institute of Oceanography, MNR, Hangzhou 310012, China
    3. College of Oceanography, Hohai University, Nanjing 210024, China
  • Received:2022-05-10 Revised:2022-10-20 Online:2023-06-15 Published:2023-07-27


The diversity and geographical distribution pattern of deep-sea polychaete animals have been a research focus of deep-sea biodiversity science. Data from the Ocean Biogeographic Information System (OBIS) were used to analyze the characters of deep-sea benthic polychaetes diversity and distribution in the western Pacific. The results show that the collection data mainly distributed in the distinctive geographic units (e.g. seamounts and trench) near coastal countries. A total of 318 species from 51 families were recorded in the study area. Polynoidae has the highest species diversity and the largest depth distribution. The number of species decreases with depth, but increases at 2 500-3 000 m and 4 000-4 500 m. The deep-sea polychaetes exhibit high levels of endemism. Many species are endemic to hydrothermal vents. For deep-sea benthic polychaetes in the western Pacific, four biogeographical areas are recognized: Sea of Japan, biogeographic area near the continent represented by Sagami Bay, region characterized by hydrothermal vents (Okinawa Trough, Manus Basin, Fiji Basin) and regions characterized by trenches or plains (Japan Trench, Kuril-Kamchatka Trench, eastern Australia and New Zealand area).

Key words: deep sea, polychaetes, Annelida, geographic distribution

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