Distribution and population genetic variation of cryptic species of the Alpine mayfly Baetis alpinus (Ephemeroptera: Baetidae) in the Central Alps.

Détails

ID Serval
serval:BIB_A5C656367033
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Distribution and population genetic variation of cryptic species of the Alpine mayfly Baetis alpinus (Ephemeroptera: Baetidae) in the Central Alps.
Périodique
Bmc Evolutionary Biology
Auteur(s)
Leys M., Keller I., Räsänen K., Gattolliat J.L., Robinson C.T.
ISSN
1471-2148 (Electronic)
ISSN-L
1471-2148
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
16
Numéro
1
Pages
77
Langue
anglais
Résumé
BACKGROUND: Many species contain evolutionarily distinct groups that are genetically highly differentiated but morphologically difficult to distinguish (i.e., cryptic species). The presence of cryptic species poses significant challenges for the accurate assessment of biodiversity and, if unrecognized, may lead to erroneous inferences in many fields of biological research and conservation.
RESULTS: We tested for cryptic genetic variation within the broadly distributed alpine mayfly Baetis alpinus across several major European drainages in the central Alps. Bayesian clustering and multivariate analyses of nuclear microsatellite loci, combined with phylogenetic analyses of mitochondrial DNA, were used to assess population genetic structure and diversity. We identified two genetically highly differentiated lineages (A and B) that had no obvious differences in regional distribution patterns, and occurred in local sympatry. Furthermore, the two lineages differed in relative abundance, overall levels of genetic diversity as well as patterns of population structure: lineage A was abundant, widely distributed and had a higher level of genetic variation, whereas lineage B was less abundant, more prevalent in spring-fed tributaries than glacier-fed streams and restricted to high elevations. Subsequent morphological analyses revealed that traits previously acknowledged as intraspecific variation of B. alpinus in fact segregated these two lineages.
CONCLUSIONS: Taken together, our findings indicate that even common and apparently ecologically well-studied species may consist of reproductively isolated units, with distinct evolutionary histories and likely different ecology and evolutionary potential. These findings emphasize the need to investigate hidden diversity even in well-known species to allow for appropriate assessment of biological diversity and conservation measures.
Mots-clé
Animal Distribution, Animals, Bayes Theorem, Biodiversity, Biological Evolution, DNA, Mitochondrial/genetics, Ecosystem, Ephemeroptera/anatomy & histology, Ephemeroptera/classification, Genetic Variation, Genetics, Population, Microsatellite Repeats, Phylogeny, Switzerland, Sympatry
Pubmed
Web of science
Open Access
Oui
Création de la notice
19/04/2016 18:14
Dernière modification de la notice
08/05/2019 23:14
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