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

doi:10.3969/j.issn.1001-909X.2023.02.009

Abstract

Abstract:

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

CLC Number:

Q958.2

WANG Yueyun, YAN Runxuan, WANG Chunsheng. Geographical distribution pattern of deep-sea benthic polychaetes in the western Pacific[J]. Journal of Marine Sciences, 2023, 41(2): 104-113.

Figures/Tables 6

Fig.1 Distribution of deep-sea benthic polychaetes (a) and species richness in different depth segments (b)

Fig.2 Species richness in each polychaete families

Tab.1 The top 10 deep-sea benthic polychaete families with the most records in the western Pacific

序号	科名	记录数	分布水深/m
1	阿尔文虫科Alvinellidae	247	1 002~3 600
2	多鳞虫科Polynoidae	141	1 000~12 000
3	鳞沙蚕科Aphroditidae	99	1 000~4 800
4	米列虫科Melinnidae	96	1 005~2 821
5	叉螠科Bonelliidae	86	1 088~9 950
6	欧努菲虫科Onuphidae	83	1 000~4 744
7	双栉虫科Ampharetidae	81	1 028~5 613
8	竹节虫科Maldanidae	65	1 005~7 290
9	西伯加虫科Siboglinidae	55	1 053~9 600
10	仙虫科Amphinomidae	44	1 013~4 200

Fig.3 Cluster analysis result using Ward method based on Jaccard distance

Fig.4 Upset plot showing intersections of different grids (left bar chart: species richness in each grids; upper bar chart: intersection size showing number of shared or endemic species; points matrix: intersection of grids, the numbers on the left of the matrix represent the number of grid; black solid circle: number of species unique to each grid; solid circle and lines: shared species between different grids.)

Fig.5 PAE result base on geographical feature units

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