Distribution of a residual population of the Dytiscid Graphoderus bilineatus (de Geer, 1774) in the Grande Cariçaie nature reserves, Switzerland

By

Knoblauch, Aline
Gander, Antoine

Type

Article

Date of Publication

2019-4-18

Original Publication

Metabarcoding and metagenomics

Volume

3

Pages

83--91

Subjects

Coleoptera , Conservation , diving beetle , Graphoderus , wetland

Contributed by

Pensoft Publishers

Language

English

Published by

Bulgaria Pensoft Publishers 2017-

Identifiers

DOI: https://doi.org/10.3897/alpento.3.30417

 

Abstract

Currently, the distribution of diving beetles in Switzerland is poorly known making it difficult to determine conservation priorities for species with small and/or declining populations. In order to establish conservation priorities, in 2018, we surveyed diving beetles of the genusGraphoderusin the Grande Cariçaie reserves with special consideration for the Red ListedG.bilineatus. WhileG.bilineatusandG.cinereusshowed high habitat niche overlap, the distribution ofG.bilineatuswas limited to mainly one of the eight reserves. When comparing our results to available historical data, the habitat ofG.bilineatushas likely diminished during the last 40 years. Our study provides the first comprehensive documentation of the distribution ofGraphoderusspecies in the Grande Cariçaie. We further highlight the importance for improving the knowledge ofG.bilineatusdistribution in Switzerland to develop policy for conservation of this globally threatened species.