An evolutionary trade-off between parasite virulence and dispersal at experimental invasion fronts

Norgaard Louise S.; Zilio Giacomo; Saade Camille; Gougat-Barbera Claire; Hall Matthew D.; Fronhofer Emanuel A.; Kaltz Oliver

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An evolutionary trade-off between parasite virulence and dispersal at experimental invasion fronts

机译：在实验侵袭方面的寄生虫毒力与分散之间的进化折衷

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Exploitative parasites are predicted to evolve in highly connected populations or in expanding epidemics. However, many parasites rely on host dispersal to reach new populations, potentially causing conflict between local transmission and global spread. We performed experimental range expansions in interconnected microcosms of the protozoan Paramecium caudatum, allowing natural dispersal of hosts infected with the bacterial parasite Holospora undulata. Parasites from range front treatments facilitated host dispersal and were less virulent, but also invested less in horizontal transmission than parasites from range cores. These differences were consistent with parameter estimates derived from an epidemiological model fitted on population-level time-series data. Our results illustrate how dispersal selection can have profound consequences for the evolution of parasite life history and virulence. Decrypting the eco-evolutionary processes that shape parasite 'dispersal syndromes' may be important for the management of spreading epidemics in changing environments, biological invasions or in other spatial non-equilibrium settings.

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来源
《Ecology letters》 |2021年第4期|共12页
作者
Norgaard Louise S.; Zilio Giacomo; Saade Camille; Gougat-Barbera Claire; Hall Matthew D.; Fronhofer Emanuel A.; Kaltz Oliver;
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作者单位

Monash Univ Ctr Geometr Biol Sch Biol Sci Melbourne Vic 3800 Australia;

Univ Montpellier ISEM CNRS IRD EPHE Montpellier France;

Univ Montpellier ISEM CNRS IRD EPHE Montpellier France;

Univ Montpellier ISEM CNRS IRD EPHE Montpellier France;

Monash Univ Ctr Geometr Biol Sch Biol Sci Melbourne Vic 3800 Australia;

Univ Montpellier ISEM CNRS IRD EPHE Montpellier France;

Univ Montpellier ISEM CNRS IRD EPHE Montpellier France;

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原文格式 PDF
正文语种 eng
中图分类普通生物学;
关键词
disease; dispersal syndrome; ecoamp; 8208; evolution; epidemics; experimental evolution; Holospora undulata; horizontal and vertical transmission; hostamp; 8211; parasite interactions; Paramecium caudatum; range expansion;

机译：疾病;分散综合征;生态＆amp;8208;进化;流行病;实验演化;HoloSpora undulata;横向和垂直传输;主持人＆amp;8211;寄生虫互动;散柄;范围扩张;

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An evolutionary trade-off between parasite virulence and dispersal at experimental invasion fronts

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