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Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 506915
Title Pack hunting by a common soil amoeba on nematodes
Author(s) Geisen, Stefan; Rosengarten, J.; Koller, R.; Mulder, Christian; Urich, T.; Bonkowski, M.
Source Environmental Microbiology 17 (2015)11. - ISSN 1462-2912 - p. 4538 - 4546.
Department(s) Laboratory of Nematology
Publication type Refereed Article in a scientific journal
Publication year 2015
Abstract Soils host the most complex communities on Earth,
including the most diverse and abundant eukaryotes,
i.e. heterotrophic protists. Protists are generally con-
sidered 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 nema-
todes suggests a beneficial predatory life history of
these omnivorous soil amoebae.
operculata appears to selectively impact the nema-
tode community composition as reductions of nema-
tode numbers were species specific. Furthermore, we
investigated 12 soil metatranscriptomes from five dis-
tinct 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 per-
formed 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 consider-
able importance of the hitherto neglected trophic link
‘nematophagous protists’ in soil food webs

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