Universität zu Köln

Hohlfeld, Manon ORCID: 0000-0001-7777-4715, Schoenle, Alexandra and Arndt, Hartmut (2021). Horizontal and vertical small-scale patterns of protist communities at the Atlantic deep-sea floor. Deep-Sea Res. Part I-Oceanogr. Res. Pap., 171. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1879-0119

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Abstract

Spatial distribution patterns of protists in the deep sea are not yet understood and due to the remoteness of the deep-sea biome this is a challenging task. Here, we investigated the structure and dispersal of protist communities in abyssal sediments at three sites in the Caribbean Sea (15?53.21?N/68?55.73?W), the northwestern Atlantic (23?33.23?N/48?05.04?W) and the central Atlantic Ocean (10?20.38?N/36?57.76?W), focusing especially on small horizontal (-1 m) and vertical (1 cm) spatial scales. High-throughput sequencing of the V9 SSU rDNA, revealed diverse protist communities dominated by diplonemids and dinoflagellates. Only 12% of OTUs were shared between the three deep-sea regions (4000?5134 m deep), indicating patterns of protistan distribution at large spatial scales in deep-sea sediments. The analyses of sediment samples taken from cores of the same MultiCorer deployment, separated by -1 m, showed differences in the community structure, indicating a distinct microbial eukaryotic diversity even at a local horizontal scale. At a vertical scale, in different sediment depth layers (upper 2 mm layer, 1 cm, 2 cm, 3 cm) of the same core, only 4?11% of OTUs were shared. We could show, that already at small spatial scales protist communities varied strongly, indicating an underestimated complexity of deep-sea microbial food webs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hohlfeld, Manon UNSPECIFIED orcid.org/0000-0001-7777-4715 UNSPECIFIED Schoenle, Alexandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Arndt, Hartmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-565678
DOI:	10.1016/j.dsr.2021.103515
Journal or Publication Title:	Deep-Sea Res. Part I-Oceanogr. Res. Pap.
Volume:	171
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1879-0119
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MICROBIAL EUKARYOTES; STANDING STOCK; HABITAT HETEROGENEITY; SPATIAL HETEROGENEITY; BENTHIC FORAMINIFERA; DIVERSITY; ABYSSAL; SEDIMENT; PACIFIC; BIODIVERSITY Multiple languages Oceanography Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/56567