Diversity hotspot and unique community structure of foraminifera in the world's deepest marine blue hole - Sansha Yongle Blue Hole.

Abstract:

:Marine blue holes are precious geological heritages with high scientific research values. Their physical and chemical characteristics are unique because of the steep-walled structure and isolated water column which create isolated ecosystems in geographically restricted areas. The Sansha Yongle Blue Hole (SYBH) is the world's deepest marine blue hole. Here, we generated the first DNA metabarcoding dataset from SYBH sediment focusing on foraminifera, a group of protists that have colonized various marine environments. We collected sediment samples from SYBH along a depth gradient to characterize the foraminiferal diversity and compared them with the foraminiferal diversity of the costal Jiaozhou Bay (JZB) and the abyssal Northwest Pacific Ocean (NWP). We amplified the SSU rDNA of foraminifera and sequenced them with high-throughput sequencing. The results showed that the foraminiferal assemblages in SYBH were vertically structured in response to the abiotic gradients and diversity was higher than in JZB and NWP. This study illustrates the capacity of foraminifera to colonize hostile environments and shows that blue holes are natural laboratories to explore physiological innovation associated with anoxia.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Li Q,Lei Y,Morard R,Li T,Wang B

doi

10.1038/s41598-020-67221-0

subject

Has Abstract

pub_date

2020-06-24 00:00:00

pages

10257

issue

1

issn

2045-2322

pii

10.1038/s41598-020-67221-0

journal_volume

10

pub_type

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