Range size patterns in European freshwater trematodes

David Thieltges; Christian Hof; Michael Krabbe Borregaard; Matthias Dehling; Martin Brändle; Roland Brandl; Robert Poulin

doi:10.1111/j.1600-0587.2010.06268.x

Range size patterns in European freshwater trematodes

Bidragets oversatte titel: Udbredelsesmønstre hos europæiske ferskvandstrematoder

David Thieltges, Christian Hof, Michael Krabbe Borregaard, Matthias Dehling, Martin Brändle, Roland Brandl, Robert Poulin

Ecology and Evolution

15 Citationer (Scopus)

Abstract

Aim We investigated the relationship between host and parasite diversity as well as latitudinal gradients in parasite diversity on a continental scale in European freshwater trematodes. Location European freshwaters. Methods We extracted distributional data for 564 freshwater trematodes across 25 biogeographical regions in Europe from the Limnofauna Europaea and used multiple regression analyses to test for correlations between the diversity of definitive (vertebrates) or first intermediate (gastropods) hosts and that of trematodes, and for latitudinal gradients in trematode diversity. In particular, we investigated patterns in beta diversity among latitudinal bands and between trematode species that parasitize host groups with low (autogenic) and high (allogenic) dispersal capacity.We also tested for a latitudinal gradient in the proportional representation of these two trematode groups within regional faunas. Results Latitude or first intermediate host richness had no effect on trematode richness, but definitive host richness was a strong predictor of trematode richness, among both allogenic and autogenic parasites. We found that beta diversity of trematode faunas within latitudinal bands decreased to the north, with similar values for allogenic and autogenic trematodes. Finally, we observed an increasing proportion of autogenic species toward the north of Europe. Main conclusions The richness of definitive hosts appears to be the driver of trematode diversity at a continental scale. The latitudinal gradient in beta diversity reflects patterns observed in free-living species and probably results from recolonization in the aftermath of the ice ages. The similar beta-diversity patterns of allogenic and autogenic trematodes and the increasing proportion of autogenic trematodes with increasing latitude are surprising.We suggest that the geographical scale of our analysis or confounding factors such as differences in habitat utilization and specialization may partly explain these patterns.

Bidragets oversatte titel	Udbredelsesmønstre hos europæiske ferskvandstrematoder
Originalsprog	Engelsk
Tidsskrift	Ecography
Vol/bind	34
Udgave nummer	6
Sider (fra-til)	982-989
Antal sider	8
ISSN	0906-7590
DOI	https://doi.org/10.1111/j.1600-0587.2010.06268.x
Status	Udgivet - dec. 2011

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10.1111/j.1600-0587.2010.06268.x

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title = "Range size patterns in European freshwater trematodes",

abstract = "While patterns in geographic range sizes in free-living species have received much attention, little is known on the corresponding patterns in parasites. For the first time, we report on patterns in geographic range sizes and dimensions of endoparasites, using published species lists of freshwater trematodes in 25 biogeographical regions of Europe. In general, the range sizes of trematodes showed a typical hollow curve frequency distribution, with most species having small ranges. Contrary to expectations, there were no differences in range sizes among trematodes using hosts with high (birds) and limited dispersal capacity (e.g. fish). This suggests that the well known importance of host dispersal capacity for parasite dispersal at small spatial scales is overridden by other factors on larger scales. Regression analyses and Rohde plots showed that the relationship between the latitudinal centre and trematode range size was hump-shaped in all host groups except for reptiles, for which it was linear. Most of the variation fell within the expectations given by null models, suggesting that the patterns mainly result from the geographic properties of the European continent and the biogeographical regions. Finally, trematode ranges tended to stretch more in east-west than in north-south directions, indicating dispersal barrier effects for parasite faunas, probably resulting from the geographical idiosyncrasies of the European continent.",

author = "David Thieltges and Christian Hof and Borregaard, {Michael Krabbe} and Matthias Dehling and Martin Br{\"a}ndle and Roland Brandl and Robert Poulin",

year = "2011",

month = dec,

doi = "10.1111/j.1600-0587.2010.06268.x",

language = "English",

volume = "34",

pages = "982--989",

journal = "Ecography",

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TY - JOUR

T1 - Range size patterns in European freshwater trematodes

AU - Thieltges, David

AU - Hof, Christian

AU - Borregaard, Michael Krabbe

AU - Dehling, Matthias

AU - Brändle, Martin

AU - Brandl, Roland

AU - Poulin, Robert

PY - 2011/12

Y1 - 2011/12

N2 - While patterns in geographic range sizes in free-living species have received much attention, little is known on the corresponding patterns in parasites. For the first time, we report on patterns in geographic range sizes and dimensions of endoparasites, using published species lists of freshwater trematodes in 25 biogeographical regions of Europe. In general, the range sizes of trematodes showed a typical hollow curve frequency distribution, with most species having small ranges. Contrary to expectations, there were no differences in range sizes among trematodes using hosts with high (birds) and limited dispersal capacity (e.g. fish). This suggests that the well known importance of host dispersal capacity for parasite dispersal at small spatial scales is overridden by other factors on larger scales. Regression analyses and Rohde plots showed that the relationship between the latitudinal centre and trematode range size was hump-shaped in all host groups except for reptiles, for which it was linear. Most of the variation fell within the expectations given by null models, suggesting that the patterns mainly result from the geographic properties of the European continent and the biogeographical regions. Finally, trematode ranges tended to stretch more in east-west than in north-south directions, indicating dispersal barrier effects for parasite faunas, probably resulting from the geographical idiosyncrasies of the European continent.

AB - While patterns in geographic range sizes in free-living species have received much attention, little is known on the corresponding patterns in parasites. For the first time, we report on patterns in geographic range sizes and dimensions of endoparasites, using published species lists of freshwater trematodes in 25 biogeographical regions of Europe. In general, the range sizes of trematodes showed a typical hollow curve frequency distribution, with most species having small ranges. Contrary to expectations, there were no differences in range sizes among trematodes using hosts with high (birds) and limited dispersal capacity (e.g. fish). This suggests that the well known importance of host dispersal capacity for parasite dispersal at small spatial scales is overridden by other factors on larger scales. Regression analyses and Rohde plots showed that the relationship between the latitudinal centre and trematode range size was hump-shaped in all host groups except for reptiles, for which it was linear. Most of the variation fell within the expectations given by null models, suggesting that the patterns mainly result from the geographic properties of the European continent and the biogeographical regions. Finally, trematode ranges tended to stretch more in east-west than in north-south directions, indicating dispersal barrier effects for parasite faunas, probably resulting from the geographical idiosyncrasies of the European continent.

U2 - 10.1111/j.1600-0587.2010.06268.x

DO - 10.1111/j.1600-0587.2010.06268.x

M3 - Journal article

SN - 0906-7590

VL - 34

SP - 982

EP - 989

JO - Ecography

JF - Ecography

IS - 6

ER -

Range size patterns in European freshwater trematodes

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