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The speciation mechanisms of the oligoxenous feather mite species (Astigmata; Analgoidea) from passerine birds (Passeriformes)

Agnieszka Guzicka

Abstract

Feather mites are highly host specialized commensals and parasites of birds. The (co)phylogenetic analyses made so far were conducted on higher taxonomic levels and suggested the co-speciation that as a main evolutionary mechanism determining the observed host-parasite relationships. My studies concern the mechanisms of the feather mite speciation at the initial stage. Two multihost species of mites were chosen as a model: Proctophyllodes stylifer from 4 tit species and P. clavatus inhabiting several passerines (mostly sylvids). Co(phylogenetic) analyses and reconstruction of haplotype genealogy were conducted using molecular data (mtDNA COI marker) and supplemented by morphological data. The verified host range of P. stylifer was consistent with literature data while the real hosts of P. clavatus are 3 Sylvia species, Aegithalos caudatus and Certhia brachydactyla. In various parts of host geographical range there was discovered a replacement of P. clavatus populations by other Proctophyllodes species. Moreover, an unusual case of phenotypic plasticity was found in P. clavatus from Sylvia curruca; the same phenotype was represented by two different COI haplotypes, one of P. clavatus, the second of P. sylviae. All analyses show that early speciation mechanisms act in both analyzed species, but in spite of clear genetic separation of some populations the genetic distances between them are on the intraspecific level only. In case of P. stylifer the co-phylogenetic analysis revealed the co-speciation as a main evolutionary mechanism, while in P. clavatus the main evolutionary event was the horizontal transfer, never reported previously in such an extent.
Record ID
UAM2f6a6a08e8b048e388fedae36373699a
Diploma type
Doctor of Philosophy
Author
Agnieszka Guzicka (SNP/WB/FoB) Agnieszka Guzicka,,
Title in Polish
Mechanizmy specjacji oligoksenicznych gatunków roztoczy piór (Astigmata: Analgoidea) zasiedlających ptaki wróblowate (Passeriformes)
Title in English
The speciation mechanisms of the oligoxenous feather mite species (Astigmata; Analgoidea) from passerine birds (Passeriformes)
Language
pl Polish
Certifying Unit
Faculty of Biology (SNP/WB/FoB)
Discipline
biology / (biological sciences domain) / (biological sciences)
Scientific discipline (2.0)
6.4 biological sciences
Defense Date
16-04-2012
Title date
16-04-2012
Supervisor
URL
http://hdl.handle.net/10593/2417 opening in a new tab
Keywords in English
phylogeny, cophylogeny, speciation
Abstract in English
Feather mites are highly host specialized commensals and parasites of birds. The (co)phylogenetic analyses made so far were conducted on higher taxonomic levels and suggested the co-speciation that as a main evolutionary mechanism determining the observed host-parasite relationships. My studies concern the mechanisms of the feather mite speciation at the initial stage. Two multihost species of mites were chosen as a model: Proctophyllodes stylifer from 4 tit species and P. clavatus inhabiting several passerines (mostly sylvids). Co(phylogenetic) analyses and reconstruction of haplotype genealogy were conducted using molecular data (mtDNA COI marker) and supplemented by morphological data. The verified host range of P. stylifer was consistent with literature data while the real hosts of P. clavatus are 3 Sylvia species, Aegithalos caudatus and Certhia brachydactyla. In various parts of host geographical range there was discovered a replacement of P. clavatus populations by other Proctophyllodes species. Moreover, an unusual case of phenotypic plasticity was found in P. clavatus from Sylvia curruca; the same phenotype was represented by two different COI haplotypes, one of P. clavatus, the second of P. sylviae. All analyses show that early speciation mechanisms act in both analyzed species, but in spite of clear genetic separation of some populations the genetic distances between them are on the intraspecific level only. In case of P. stylifer the co-phylogenetic analysis revealed the co-speciation as a main evolutionary mechanism, while in P. clavatus the main evolutionary event was the horizontal transfer, never reported previously in such an extent.

Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/phd/UAM2f6a6a08e8b048e388fedae36373699a/

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