Mass mortality in two common soft-bottom invertebrates,Hydrobia ulvae andCorophium volutator-the possible role of trematodes

Jensen, Kaj Frank; Mouritsen, Kim N.

doi:10.1007/bf02367103

Cited by 92 publications

(91 citation statements)

References 21 publications

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“…Fredensborg et al, 2004b). Also, several consecutive days of unseasonably hot weather and the associated increase in cercarial production by trematodes on intertidal mudflats can cause the mass mortality and local extinction of the parasites' second intermediate hosts (Jensen & Mouritsen, 1992). Thus, there is no need for the increased cercarial output to be maintained over many weeks or months, for the temperature-mediated effects of parasites to have a substantial ecological impact.…”

Section: Temperature and The Local Abundance Of Parasitesmentioning

confidence: 99%

“…The life cycle is completed when an amphipod, and the metacercariae it harbours, are ingested by a bird. Infected snails are ultimately castrated by the parasites and suffer from higher mortality when exposed to environmental stress (Jensen & Mouritsen, 1992;Mouritsen & Jensen, 1994;Jensen et al, 1996). Similarly, the trematodes increase the mortality rates of the amphipod C. volutator under both laboratory (Mouritsen & Jensen, 1997;Jensen et al, 1998;Meissner & Bick, 1999) and field conditions (Jensen & Mouritsen, 1992;Meissner & Bick, 1997).…”

Section: Predicting the Impact Of Global Warmingmentioning

confidence: 99%

“…The stabilizing influence of the amphipods' tubes contributes significantly to the physical nature of the mudflats. Their disappearance was accompanied by significant changes in the abundance of other macrofaunal species on the mudflats (Jensen & Mouritsen, 1992). Parasitism by trematodes in C. volutator can thus have community-wide impacts, and the increased local extinctions of this amphipod that are likely to result from global warming will have wide repercussions.…”

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confidence: 99%

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Climate change, parasitism and the structure of intertidal ecosystems

2006

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Evidence is accumulating rapidly showing that temperature and other climatic variables are driving many ecological processes. At the same time, recent research has highlighted the role of parasitism in the dynamics of animal populations and the structure of animal communities. Here, the likely interactions between climate change and parasitism are discussed in the context of intertidal ecosystems. Firstly, using the soft-sediment intertidal communities of Otago Harbour, New Zealand, as a case study, parasites are shown to be ubiquitous components of intertidal communities, found in practically all major animal species in the system. With the help of specific examples from Otago Harbour, it is demonstrated that parasites can regulate host population density, influence the diversity of the entire benthic community, and affect the structure of the intertidal food web. Secondly, we document the extreme sensitivity of cercarial production in parasitic trematodes to increases in temperature, and discuss how global warming could lead to enhanced trematode infections. Thirdly, the results of a simulation model are used to argue that parasitemediated local extinctions of intertidal animals are a likely outcome of global warming. Specifically, the model predicts that following a temperature increase of less than 48C, populations of the amphipod Corophium volutator, a hugely abundant tube-building amphipod on the mudflats of the Danish Wadden Sea, are likely to crash repeatedly due to mortality induced by microphallid trematodes. The available evidence indicates that climate-mediated changes in local parasite abundance will have significant repercussions for intertidal ecosystems. On the bright side, the marked effects of even slight increases in temperature on cercarial production in trematodes could form the basis for monitoring programmes, with these sensitive parasites providing early warning signals of the environmental impacts of global warming.

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Section: Temperature and The Local Abundance Of Parasitesmentioning

confidence: 99%

Section: Predicting the Impact Of Global Warmingmentioning

confidence: 99%

mentioning

confidence: 99%

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Climate change, parasitism and the structure of intertidal ecosystems

2006

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“…Werding 1969;Lauckner 1971;Hulscher 1973;Swennen and Ching 1974;Michaelis 1978;Jensen and Mouritsen 1992;Mouritsen and Jensen 1994). Our study is the first to compile a parasite species inventory from the 10 most common mollusc species in the same system and it investigates some hosts for the first time in the Wadden Sea.…”

Section: H Y D R O B I a U L V A E L I T T O R I N A L I T T O R E A mentioning

confidence: 99%

Macroparasite community in molluscs of a tidal basin in the Wadden Sea

et al. 2006

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We provide a quantitative inventory of macroparasites in intertidal molluscs from a tidal basin in the Wadden Sea (eastern North Sea). Gastropods and bivalves contained a species rich macroparasite community consisting of trematodes (26 species), turbellarians (1), nematodes (1), copepods (2) and polychaetes (1) in 3,800 host individuals from 10 host species. Highest parasite burdens were observed in the gastropods Hydrobia ulvae and Littorina littorea and in the bivalves Cerastoderma edule and Mytilus edulis. In contrast, only one parasite species and no trematodes were found in Crepidula fornicata. The parasite community in the molluscs was similar to other Western European localities but some parasite species showed obvious differences, related to the large-scale distribution of intermediate and final hosts. Parasitism seems to be a common phenomenon in molluscs of the Wadden Sea and hence the detrimental effects observed in experiments can be expected to frequently happen in the field.

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“…We are currently focusing on microphallid species utilizing H. ulvae and Corophium volutator (Pallas, 1766) as first and second intermediate host, respectively, and shorebirds as final host. Two of these trematodes [Maritrema subdolum (Jaegerskjold, 1909) and Microphallus claviformis (Brandes, 1888)] are reported to influence the population dynamics of their amphipod hosts (Lauckner 1987;Jensen and Mouritsen 1992;Mouritsen and Jensen 1997;Jensen et al 1998;Meissner andBick 1997, 1999;Meissner 2001). Considering that closely related microphallids may have quite different host effects (Combes 1995), a proper identification of sibling species is required for ecological studies.…”

Section: Introductionmentioning

confidence: 99%

Use of ITS rDNA for discriminating of larval stages of two microphallid (Digenea) species using Hydrobia ulvae (Pennant, 1777) and Corophium volutator (Pallas, 1766) as intermediate hosts

et al. 2004

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Digenean trematodes encompass several species with little morphological differentiation in the larval stages and, as a result, uncertainty prevails regarding species identification. The microphallid trematode Maritrema subdolum occurs widespread geographically in mud snail and crustacean hosts in European marine shallow-water ecosystems. Larval stages of this and other congeneric species are, however, difficult to separate morphologically. To verify the species status and to secure identification of two co-occurring microphallids, M. subdolum and microphallid sp. no. 15 (Deblock, 1980), we examined the nucleotide sequences of the internal transcribed spacer regions (ITS1, ITS2). From fragments consisting of both ITS regions and the 5.8S gene (nearly 1,200 bp), a sequence divergence of 2.9% between the two types was recorded. In accordance with the morphological traits of the cercariae (stylet shape, length), the results support the view that the two types actually represent different species. Species-specific primers were prepared for each species. They proved to be efficient diagnostic tools for identifying single larvalstage individuals. Using these primers, infections in host organisms were also verified without performing a dissection of the host individuals.

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Mass mortality in two common soft-bottom invertebrates,Hydrobia ulvae andCorophium volutator-the possible role of trematodes

Cited by 92 publications

References 21 publications

Climate change, parasitism and the structure of intertidal ecosystems

Climate change, parasitism and the structure of intertidal ecosystems

Macroparasite community in molluscs of a tidal basin in the Wadden Sea

Use of ITS rDNA for discriminating of larval stages of two microphallid (Digenea) species using Hydrobia ulvae (Pennant, 1777) and Corophium volutator (Pallas, 1766) as intermediate hosts

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