Universität zu Köln

Zivaljic, Suzana, Schoenle, Alexandra, Scherwass, Anja, Hohlfeld, Manon, Nitsche, Frank and Arndt, Hartmut ORCID: 0000-0003-2811-3595 (2020). Influence of hydrostatic pressure on the behaviour of three ciliate species isolated from the deep-sea floor. Mar. Biol., 167 (5). HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1432-1793

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Abstract

Locomotion is considered to be the main form of expression of ciliate behaviour regarding their overall life activity. But how ciliates behave under deep-sea conditions is still unclear. Data on the occurrence of ciliates in the deep sea are scarce and mostly based on molecular studies. We isolated three different ciliates, Aristerostoma sp., Euplotes dominicanus and Pseudocohnilembus persalinus from two stations located in abyssal depths of the North Atlantic Ocean (>= 4000 m; 15 degrees 55.89 ' N, 68 degrees 53.34 ' W; 23 degrees 33.23 ' N, 48 degrees 5.04 ' W) during the deep-sea expedition with the research vessel R/V Meteor (Cruise M139, 08.07.-08.08.2017). We observed their behaviour directly under high hydrostatic pressures up to 500 bar. The three ciliate species behaved normally up to a pressure of 200 bar, but showed disturbances of the normal behaviour at higher pressures. For all three isolated deep-sea ciliates, additional long-term survival experiments were carried out for 6 days at 200, 350 and 430 bar. Several specimens showed an ability to survive the entire experimental time interval at the highest pressure and to recover from pressure release (returning to their normal movement) indicating their barotolerance. Our results suggest that ciliates are active in the deep sea even in regions deeper than 2000 m and might be an important part of the deep-sea microbial food web.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zivaljic, Suzana UNSPECIFIED UNSPECIFIED UNSPECIFIED Schoenle, Alexandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Scherwass, Anja UNSPECIFIED UNSPECIFIED UNSPECIFIED Hohlfeld, Manon UNSPECIFIED UNSPECIFIED UNSPECIFIED Nitsche, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Arndt, Hartmut UNSPECIFIED orcid.org/0000-0003-2811-3595 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-336816
DOI:	10.1007/s00227-020-3673-3
Journal or Publication Title:	Mar. Biol.
Volume:	167
Number:	5
Date:	2020
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1432-1793
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OPTICAL CHAMBER SYSTEM; LIVING CELLS; MICROSCOPIC OBSERVATION; HYDROTHERMAL VENT; WATER-COLUMN; SURFACE; RNA; CILIOPHORA; DIVERSITY; ECOSYSTEMS Multiple languages Marine & Freshwater Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33681