Parasite-mediated selection in experimental metapopulations of Daphnia magna

被引:28
作者
Haag, CR
Ebert, D
机构
[1] Univ Fribourg, Dept Biol, Unite Ecol & Evolut, CH-1700 Fribourg, Switzerland
[2] Tvarminne Zool Stn, SF-10900 Hango, Finland
关键词
clonal competition; coevolution; genetic diversity; Microsporidia; resistance;
D O I
10.1098/rspb.2004.2841
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
In metapopulations, only a fraction of all local host populations may be infected with a given parasite species, and limited dispersal of parasites suggests that colonization of host populations by parasites may involve only a small number of parasite strains. Using hosts and parasites obtained from a natural metapopulation, we studied the evolutionary consequences of invasion by single strains of parasites in experimental populations of the cyclical parthenogen Daphnia magna. In two experiments, each spanning approximately one season, we monitored clone frequency changes in outdoor container populations consisting of 13 and 19 D. magna clones, respectively. The populations were either infected with single strains of the microsporidian parasites Octosporea bayeri or Ordospora colligata or left unparasitized. In both experiments, infection changed the representation of clones over time significantly, indicating parasite-mediated evolution in the experimental populations. Furthermore, the two parasite species changed clone frequencies differently, suggesting that the interaction between infection and competitive ability of the hosts was specific to the parasite species. Taken together, our results suggest that parasite strains that invade local host populations can lead to evolutionary changes in the genetic composition of the host population and that this change is parasite species specific.
引用
收藏
页码:2149 / 2155
页数:7
相关论文
共 52 条
[1]   Experimental variation in polyandry affects parasite loads and fitness in a bumble-bee [J].
Baer, B ;
Schmid-Hempel, P .
NATURE, 1999, 397 (6715) :151-154
[2]   Distributions and impacts of microparasites on Daphnia in a rockpool metapopulation [J].
Bengtsson, J ;
Ebert, D .
OECOLOGIA, 1998, 115 (1-2) :213-221
[3]   THE IMPACT OF BIOLOGICAL-CONTROL ON THE DISTRIBUTION AND ABUNDANCE OF CHONDRILLA-JUNCEA IN SOUTHEASTERN AUSTRALIA [J].
BURDON, JJ ;
GROVES, RH ;
CULLEN, JM .
JOURNAL OF APPLIED ECOLOGY, 1981, 18 (03) :957-966
[4]  
Capaul M, 2003, EVOLUTION, V57, P249, DOI 10.1111/j.0014-3820.2003.tb00260.x
[5]  
Carius HJ, 2001, EVOLUTION, V55, P1136, DOI 10.1111/j.0014-3820.2001.tb00633.x
[6]  
Crowder MJ, 1990, ANAL REPEATED MEASUR
[7]  
Decaestecker E, 2003, EVOLUTION, V57, P784, DOI 10.1111/j.0014-3820.2003.tb00290.x
[8]   Host and parasite population structure in a natural plant-pathogen system [J].
Delmotte, F ;
Bucheli, E ;
Shykoff, JA .
HEREDITY, 1999, 82 (3) :300-308
[9]  
Dybdahl MF, 1998, EVOLUTION, V52, P1057, DOI [10.2307/2411236, 10.1111/j.1558-5646.1998.tb01833.x]
[10]   Parasite local adaptation: Red Queen versus Suicide King [J].
Dybdahl, MF ;
Storfer, A .
TRENDS IN ECOLOGY & EVOLUTION, 2003, 18 (10) :523-530