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Habitat and transmission – effect of tidal level and upstream host density on metacercarial load in an intertidal bivalve

  • D. W. THIELTGES (a1) (a2)
Abstract

Transmission of parasites may be mediated by their habitat, consisting of abiotic and biotic components. I investigated the effect of 2 important habitat components in intertidal ecosystems, tidal level (abiotic) and density of upstream hosts (biotic), on the transmission of trematode cercariae to cockle (Cerastoderma edule) hosts. A field survey showed no general trend in metacercarial loads of cockles regarding tidal level but species-dependent reactions. Parasites originating from Littorina littorea (Himasthla elongata, Renicola roscovita) showed highest infection levels in the low intertidal while parasites originating from Hydrobia ulvae (H. continua, H. interrupta) showed highest infection levels in the mid-intertidal. This reflected the density of upstream hosts at both tidal levels and positive relationships between the density of upstream hosts and metacercarial load in cockles suggested the biotic habitat component to be the dominant factor in transmission. This was confirmed by a field experiment, manipulating tidal level and the density of infected upstream snail hosts. While tidal level had no significant effect on the number of metacercariae of H. elongata acquired by cockles, the effect of upstream host density was strong. In conclusion, although tidal level usually is a very important abiotic habitat component in intertidal ecosystems leading to conspicuous zonation patterns in free-living organisms, it seems of minor importance for trematode transmission. In contrast, the biotic component upstream host density is suggested to be the dominant predictor for trematode transmission to second intermediate hosts. Assessing the relative importance of abiotic and biotic habitat components in transmission is vital for the understanding of transmission processes in the field.

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REFERENCES

Bertness, M. D. ( 1999). The Ecology of Atlantic Shorelines. Sinauer Associates Inc., Sunderland.
de Montaudouin, X., Wegeberg, A. M., Jensen, K. T. and Sauriau, P. G. ( 1998). Infection characteristics of Himasthla elongata cercariae in cockles as a function of water current. Diseases of Aquatic Organisms 34, 6370.
de Montaudouin, X., de Kisielewski, I., Bachelet, G. and Desclaux, C. ( 2000). A census of macroparasites in an intertidal bivalve community, Arcachon Bay, France. Oceanologica Acta 23, 453468.
Fredensborg, B. L., Mouritsen, K. N. and Poulin, R. ( 2006). Relating bird host distribution and spatial heterogeneity in trematode infections in an intertidal snail—from small to large scale. Marine Biology 149, 275283.
Grosholz, E. D. ( 1994). The effects of host genotype and spatial distribution on trematode parasitism in a bivalve population. Ecology 48, 15141524.
Hechinger, R. F. and Lafferty, K. D. ( 2005). Host diversity begets parasite diversity: bird final hosts and trematodes in snail intermediate hosts. Proceedings of the Royal Society of London, B 272, 10591066.
Krakau, M., Thieltges, D. W. and Reise, K. ( 2006). Native parasites in introduced bivalves of the North Sea. Biological Invasion (in the Press). DOI 10.1007/S10530-005-4734-8.
Lim S. S. L. and Green, R. H. ( 1991). The relationship between parasite load, crawling behaviour, and growth rate of Macoma balthica (L.) (Mollusca, Pelecypoda) from Hudson Bay, Canada. Canadian Journal of Zoology 69, 22022208.
Morley, N. J. and Lewis, J. W. ( 2004). Free-living endohelminths: the influence of multiple Factors. Trends in Parasitology 20, 114115.
Mouritsen, K. N. and Poulin, R. ( 2002). Parasitism, community structure and biodiversity in intertidal ecosystems. Parasitology 124, S101S117.
Mouritsen, K. N., McKechnie, S., Meenken, E., Toynbee, J. L. and Poulin, R. ( 2003). Spatial heterogeneity in parasite loads in the New Zealand cockle: the importance of host condition and density. Journal of the Marine Biological Association, UK 83, 307310.
Ostfeld, R. S., Glass, G. E. and Keesing, F. ( 2005). Spatial epidemiology: an emerging (or re-emerging) discipline. Trends in Ecology and Evolution 20, 328336.
Pietrock, M. and Marcogliese, D. J. ( 2002). Free-living endohelminth stages: at the mercy of environmental conditions. Trends in Parasitology 19, 293299.
Poulin, R. ( 2006). Global warming and temperature-mediated increases in cercarial emergence in trematode species. Parasitology 132, 134151.
Poulin, R. and Morand, S. ( 2004). Parasite Biodiversity. Smithsonian Books, Washington.
Poulin, R., Steeper, M. J. and Miller, A. A. ( 2000). Non-random patterns of host use by the different parasite species exploiting a cockle population. Parasitology 121, 289295.
Reise, K., Herre, E. and Sturm, M. ( 1989). Historical changes in the benthos of the Wadden Sea around the island of Sylt in the North Sea. Helgoländer Meeresuntersuchungen 43, 417433.
Schanz, A., Polte, P. and Asmus, H. ( 2002). Cascading effects of hydrodynamics on an epiphyte–grazer system in intertidal seagrass beds of the Wadden Sea. Marine Biology 141, 287297.
Sousa, W. P. and Grosholz, E. D. ( 1990). The influence of habitat structure on the transmission of parasites. In Habitat Structure: the Physical Arrangement of Objects in Space ( ed. Bell, S. S., McCoy, E. D. and Mushinsky, H. R.), pp. 300324. Chapman and Hall, London.
Thieltges, D. W. and Reise, K. ( 2006 a). Spatial heterogeneity in parasite infections at different spatial scales in an intertidal bivalve. Oecologia (in the Press). DOI 10.1007/S00442-006-0557-2.
Thieltges, D. W. and Reise, K. ( 2006 b). Metazoan parasites in intertidal cockles (Cerastoderma edule) from the northern Wadden Sea. Journal of Sea Research. DOI 10.1016/j.seares.2006.06.002.
Wilhelmsen, U. and Reise, K. ( 1994). Grazing on green algae by the periwinkle Littorina littorea in the Wadden Sea. Helgoländer Meeresuntersuchungen 48, 233242.
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Parasitology
  • ISSN: 0031-1820
  • EISSN: 1469-8161
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