Infestation of Lymnaea stagnalis by digenean flukes in the Jeziorak Lake

Żbikowska, Elżbieta; Kobak, Jarosław; Żbikowski, Janusz; Kaklewski, J.

doi:10.1007/s00436-006-0178-z

Cited by 23 publications

(25 citation statements)

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“…in fish were related to progressive eutrophication in the Lake Constance (Germany) [35]. The rates of infection with the three species associated with cyprinids and fish-eating birds in the Ruhr reservoirs studied are within the upper ranges reported so far (typically from pond systems; see [9,21,36,37]).…”

Section: Discussionmentioning

confidence: 83%

Larval trematode communities in Radix auricularia and Lymnaea stagnalis in a reservoir system of the Ruhr River

et al. 2010

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BackgroundAnalysis of the data available from traditional faunistic approaches to mollusc-trematode systems covering large spatial and/or temporal scales in Europe convinced us that a parasite community approach in well-defined aquatic ecosystems is essential for the substantial advancement of our understanding of the parasite response to anthropogenic pressures in urbanised areas which are typical on a European scale. Here we describe communities of larval trematodes in two lymnaeid species, Radix auricularia and Lymnaea stagnalis in four man-made interconnected reservoirs of the Ruhr River (Germany) focusing on among- and within-reservoir variations in parasite prevalence and component community composition and structure.ResultsThe mature reservoir system on the Ruhr River provides an excellent environment for the development of species-rich and abundant trematode communities in Radix auricularia (12 species) and Lymnaea stagnalis (6 species). The lake-adapted R. auricularia dominated numerically over L. stagnalis and played a major role in the trematode transmission in the reservoir system. Both host-parasite systems were dominated by bird parasites (13 out of 15 species) characteristic for eutrophic water bodies. In addition to snail size, two environmental variables, the oxygen content and pH of the water, were identified as important determinants of the probability of infection. Between-reservoir comparisons indicated an advanced eutrophication at Baldeneysee and Hengsteysee and the small-scale within-reservoir variations of component communities provided evidence that larval trematodes may have reflected spatial bird aggregations (infection 'hot spots'). Two life history groupings of dominant species, the 'cyprinid' and 'anatid' parasites, that depict two aspects of progressive eutrophication in this mature reservoir system, were identified.ConclusionsWe conclude that trematode communities in the lake-adapted R. auricularia are better suited for monitoring the effect of environmental change on host-parasite associations in the reservoir system on the Ruhr River and other similar systems due to the important role of this host in trematode transmission in lakes. Whereas variations in trematode community diversity and abundance may indicate the degree of eutrophication on a larger scale (among reservoirs), the infection rates of the two life history groups of dominant species, the 'cyprinid' and 'anatid' assemblages, may be particularly useful in depicting environmental variability, eutrophication effects and infection 'hot spots' on smaller spatial scales.

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Section: Discussionmentioning

confidence: 83%

Larval trematode communities in Radix auricularia and Lymnaea stagnalis in a reservoir system of the Ruhr River

et al. 2010

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“…Zdun 1959) and L. stagnalis (e.g. Bertman 1980;Żbikowska et al 2006;Żbikowska and Nowak 2009). A possible explanation might be that our samples were examined in May when snail mortality has already reduced the proportions of older cohorts in the snail populations and new cohorts have appeared.…”

Section: Small-scale Patterns Of Variationmentioning

confidence: 96%

“…Unfortunately, this is also true for some more recent attempts at assessment of host-parasite relationships in the two keystone freshwater gastropod species in Europe (e.g. Našincová 1992;Niewiadomska et al 1997;Väyrinen et al 2000;Loy and Haas 2001;Faltýnková 2005;Faltýnková and Haas 2006;Żbikowska et al 2006;Faltýnková et al 2007Faltýnková et al , 2008aŻbikowska 2007), and this is in sharp contrast to the rapid development of ecological studies at the community level on both freshwater and marine snailparasite systems in North America (see Esch et al 2001 for a review).…”

Section: Introductionmentioning

confidence: 92%

“…"dominant" by Faltýnková et al (2007Faltýnková et al ( , 2008a and Faltýnková and Haas (2006) and "most common" by Żbikowska et al (2006) may be expected to have high representation in local component communities. Four such species were recognised for L. stagnalis (Plagiorchis elegans, Opisthioglyphe ranae, Echinoparyphium aconiatum and Diplostomum pseudospathaceum; see Faltýnková and Haas 2006;Żbikowska et al 2006;Faltýnková et al 2007) and three for P. corneus ("Rubenstrema exasperatum/Neoglyphe locellus species complex", Tylodelphys excavata) and Echinostoma spiniferum of Našincová (1992) (see Faltýnková 2005;Faltýnková et al 2008a).…”

Section: Introductionmentioning

confidence: 99%

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Small-scale to large-scale and back: larval trematodes in Lymnaea stagnalis and Planorbarius corneus in Central Europe

et al. 2010

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We examined the small-scale temporal and spatial variability in composition and structure of larval trematode communities in Lymnaea stagnalis and Planorbarius corneus in two fish ponds in the Czech Republic and compared the patterns of richness and similarity to continental and regional trematode faunas of these hosts. The levels of parasitism in the populations of both hosts were high, the former parasitized predominantly by allogenic species maturing in a wide range of birds and the latter infected by relatively more species completing their life cycles in micromammals. Communities in both hosts exhibited a congruent pattern of seasonal change in overall infection rates and community composition with lower levels of infection in spring. Both temporal and spatial variation was closely related to the structure of snail populations, and no significant differentiation of community composition with respect to pond was observed. Comparisons with large-scale inventories revealed overall congruent patterns of decreased richness and similarity and increased variability at the smaller scales in both host-parasite systems. The relative compositional homogeneity of larval communities in both snail hosts irrespective of scale suggests that historical data at small to medium regional scales may provide useful estimates of past richness and composition of larval trematode communities in these snail hosts.

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“…2B) coupled to the extremely high sequence identity between L. stagnalis and the tetrapod taxa (96–98.5%; Supplementary Table 2) are suggestive of HT between snail and tetrapod(s). This transfer could be the result of another parasitic relationship because L. stagnalis is an intermediate host for diverse trematode worms that complete their life cycle in a wide range of vertebrate hosts17,18. So far, we have been unable to detect any of the horizontally-transferred transposons in the sequenced strains of Trypanosoma cruzi , one of the trypanosomes infecting R. prolixus , or in Fasciola hepatica , a mammalian trematode known to use L. stagnalis as an intermediate host.…”

mentioning

confidence: 97%

A role for host–parasite interactions in the horizontal transfer of transposons across phyla

Gilbert

Schaack

Pace

et al. 2010

Nature

237

236

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Horizontal transfer (HT), or the passage of genetic material between non-mating species, is increasingly recognized as an important force in the evolution of eukaryotic genomes 1, 2. Transposons, with their inherent ability to mobilize and amplify within genomes, may be especially prone to HT3 -7. However, the means by which transposons can spread across widely diverged species remain elusive. Here we present evidence that host-parasite interactions have promoted the HT of four transposon families between invertebrates and vertebrates. We found that Rhodnius prolixus, a triatomine bug feeding on the blood of diverse tetrapods and vector of the Chagas disease in humans, carries in its genome four distinct transposon families that also invaded the genomes of a diverse, but overlapping, set of tetrapods. The bug transposons are ~98% identical and cluster phylogenetically with those of the opossum and squirrel monkey, two of its preferred mammalian hosts in South America. We also identified one of these transposon families in the pond snail Lymnaea stagnalis, a nearly cosmopolitan vector of trematodes infecting diverse vertebrates, whose ancestral sequence is nearly identical and clusters with those found in Old World mammals. Together these data provide evidence for a previously hypothesized role of hostparasite interactions in facilitating HT among animals 3,7 . Furthermore, the large amount of DNA generated by the amplification of the horizontally-transferred transposons supports the idea that the exchange of genetic material between hosts and parasites influence their genomic evolution.In order to examine the factors underlying HT among widely diverged taxa we began our investigation with SPACE INVADERS (or SPIN), a recently described DNA transposon that has undergone repeated episodes of HT across the genomes of seven tetrapod lineages 5 . We first performed a series of BLASTN searches using the SPIN superconsensus sequence 5 as a query against all GenBank databases (see Methods), including 102 species for which whole genome shotgun (WGS) sequences are available. In addition to the vertebrates previously known to harbor SPIN, we found highly significant hits (e-values as low as 0, corresponding here to 86% identity over >1 kb) in the triatomine bug, Rhodnius prolixus, an hemipteran insect that feeds on the blood of mammals, birds, and reptiles and serves as a vector forCorrespondence and requests for materials should be addressed to C.F. (cedric@uta.edu). * These authors contributed equally to this work Supplementary Information is linked to the online version of the paper at www.nature.com/nature. Author Contributions C.G., S.S., and C.F. designed research, performed research, and analyzed data. J.K.P. contributed data and perl scripts. P.J.B. contributed reagents/material. C.G., S.S., and C.F. wrote the paper. Supplementary Fig. 2), a pattern indicative of the accumulation of discrete substitutions in each copy and consistent with neutral evolution of transposons after their integration in the genome...

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Infestation of Lymnaea stagnalis by digenean flukes in the Jeziorak Lake

Cited by 23 publications

References 50 publications

Larval trematode communities in Radix auricularia and Lymnaea stagnalis in a reservoir system of the Ruhr River

Larval trematode communities in Radix auricularia and Lymnaea stagnalis in a reservoir system of the Ruhr River

Small-scale to large-scale and back: larval trematodes in Lymnaea stagnalis and Planorbarius corneus in Central Europe

A role for host–parasite interactions in the horizontal transfer of transposons across phyla

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