Universität zu Köln

Geisen, Stefan ORCID: 0000-0003-0734-727X, Rosengarten, Jamila, Koller, Robert ORCID: 0000-0001-7251-7242, Mulder, Christian ORCID: 0000-0001-5735-6989, Urich, Tim ORCID: 0000-0002-5718-1354 and Bonkowski, Michael ORCID: 0000-0003-2656-1183 (2015). Pack hunting by a common soil amoeba on nematodes. Environ. Microbiol., 17 (11). S. 4538 - 4547. HOBOKEN: WILEY. ISSN 1462-2920

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Abstract

Soils host the most complex communities on Earth, including the most diverse and abundant eukaryotes, i.e. heterotrophic protists. Protists are generally considered as bacterivores, but evidence for negative interactions with nematodes both from laboratory and field studies exist. However, direct impacts of protists on nematodes remain unknown. We isolated the soil-borne testate amoeba Cryptodifflugia operculata and found a highly specialized and effective pack-hunting strategy to prey on bacterivorous nematodes. Enhanced reproduction in presence of prey nematodes suggests a beneficial predatory life history of these omnivorous soil amoebae. Cryptodifflugia operculata appears to selectively impact the nematode community composition as reductions of nematode numbers were species specific. Furthermore, we investigated 12 soil metatranscriptomes from five distinct locations throughout Europe for 18S ribosomal RNA transcripts of C.operculata. The presence of C.operculata transcripts in all samples, representing up to 4% of the active protist community, indicates a potential ecological importance of nematophagy performed by C.operculata in soil food webs. The unique pack-hunting strategy on nematodes that was previously unknown from protists, together with molecular evidence that these pack hunters are likely to be abundant and widespread in soils, imply a considerable importance of the hitherto neglected trophic link nematophagous protists' in soil food webs.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Geisen, Stefan UNSPECIFIED orcid.org/0000-0003-0734-727X UNSPECIFIED Rosengarten, Jamila UNSPECIFIED UNSPECIFIED UNSPECIFIED Koller, Robert UNSPECIFIED orcid.org/0000-0001-7251-7242 UNSPECIFIED Mulder, Christian UNSPECIFIED orcid.org/0000-0001-5735-6989 UNSPECIFIED Urich, Tim UNSPECIFIED orcid.org/0000-0002-5718-1354 UNSPECIFIED Bonkowski, Michael UNSPECIFIED orcid.org/0000-0003-2656-1183 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-388673
DOI:	10.1111/1462-2920.12949
Journal or Publication Title:	Environ. Microbiol.
Volume:	17
Number:	11
Page Range:	S. 4538 - 4547
Date:	2015
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1462-2920
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REVISED CLASSIFICATION; FOOD-WEB; PLANT; PROTOZOA; GENUS; DIVERSITY; PHYLOGENY; AMOEBOZOA; BACTERIA; N. Multiple languages Microbiology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38867