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Hidden biodiversity revealed by integrated morphology and genetic species delimitation of spring dwelling water mite species (Acari, Parasitengona: Hydrachnidia)
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 4515427
Author(s) Blattner, Lucas; Gerecke, Reinhard; Von Fumetti, Stefanie
Author(s) at UniBasel Blattner, Lucas
von Fumetti, Stefanie
Year 2019
Title Hidden biodiversity revealed by integrated morphology and genetic species delimitation of spring dwelling water mite species (Acari, Parasitengona: Hydrachnidia)
Journal Parasites and Vectors
Volume 12
Number 1
Pages / Article-Number 492
Keywords cox1, Barcoding, Species delimitation, Crenobiosis, 28S, Springs, Biodiversity, Phylogeny, ABGD
Abstract Background: Water mites are among the most diverse organisms inhabiting freshwater habitats and are considered as substantial part of the species communities in springs. As parasites, Hydrachnidia influence other invertebrates and play an important role in aquatic ecosystems. In Europe, 137 species are known to appear solely in or near spring- heads. New species are described frequently, especially with the help of molecular species identification and delimi- tation methods. The aim of this study was to verify the mainly morphology-based taxonomic knowledge of spring- inhabiting water mites of central Europe and to build a genetic species identification library. Methods: We sampled 65 crenobiontic species across the central Alps and tested the suitability of mitochondrial ( cox 1) and nuclear ( 28S ) markers for species delimitation and identification purposes. To investigate both markers, distance- and phylogeny-based approaches were applied. The presence of a barcoding gap was tested by using the automated barcoding gap discovery tool and intra- and interspecific genetic distances were investigated. Further- more, we analyzed phylogenetic relationships between different taxonomic levels. Results: A high degree of hidden diversity was observed. Seven taxa, morphologically identified as Bandakia con- creta Thor, 1913, Hygrobates norvegicus (Thor, 1897), Ljania bipapillata Thor, 1898, Partnunia steinmanni Walter, 1906, Wandesia racovitzai Gledhill, 1970, Wandesia thori Schechtel, 1912 and Zschokkea oblonga Koenike, 1892, showed high intraspecific cox 1 distances and each consisted of more than one phylogenetic clade. A clear intraspecific threshold between 5.6-6.0% K2P distance is suitable for species identification purposes. The monophyly of Hydrachnidia and the main superfamilies is evident with different species clearly separated into distinct clades. cox 1 separates water mite species but is unsuitable for resolving higher taxonomic levels. Conclusions: Water mite species richness in springs is higher than has been suggested based on morphological species identification alone and further research is needed to evaluate the true diversity. The standard molecular species identification marker cox 1 can be used to identify species but should be complemented by a nuclear marker, e.g. 28S , to resolve taxonomic relationships. Our results contribute to the taxonomical knowledge on spring inhabiting Hydrachnida, which is indispensable for the development and implementation of modern environment assessment methods, e.g. metabarcoding, in spring ecology.
Publisher BioMed Central
ISSN/ISBN 1756-3305
Full Text on edoc Available
Digital Object Identifier DOI 10.1186/s13071-019-3750-y
PubMed ID
ISI-Number WOS:000491867900001
Document type (ISI) Journal Article
Top-publication of... Blattner, Lucas

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