Issue |
Int. J. Lim.
Volume 61, 2025
|
|
---|---|---|
Article Number | 2 | |
Number of page(s) | 13 | |
DOI | https://doi.org/10.1051/limn/2025001 | |
Published online | 06 February 2025 |
Research article
Description and use of Schellencandona rhodanensis sp. n. (Ostracoda, Candoninae) to locate groundwater upwelling zones in rivers and wetlands
Université Claude Bernard Lyon 1, LEHNA UMR 5023, CNRS, ENTPE, 69622 Villeurbanne, France
* Corresponding author: colin.issartel@univ-lyon1.fr
Received:
16
October
2024
Accepted:
17
January
2025
Hydrological exchanges between rivers and groundwater are essential for many ecosystem processes: identifying their location requires a set of physical, chemical and biological indicators. Here, we describe Schellencandona rhodanensis sp. n. (Ostracoda, Candoninae), a species highly sensitive to hydrologic exchanges in river sediment. The new species is close to Schellencandona triquetra (Klie, 1936), but mainly differs in the shapes of the female genital lobe and the male hemipenis. The species is described from the Rhône River watershed, where it occurs in at least five tributaries. It is a stygobite species (i.e. a groundwater specialist), occurring in both the main channel and associated wetlands, with a maximum abundance at depth of about 1 m below the sediment surface. While S. triquetra is collected in a wide range of groundwater habitats, S. rhodanensis sp. n. is mostly restricted to river interstitial habitats fed by groundwater. It can be used as a biological indicator of interstitial habitat stability and to locate groundwater upwellings in river bed sediment.
Key words: Biological indicator / hyporheic habitat / ostracod biogeography / river sediment / river hydrology
© C. Issartel and P. Marmonier, Published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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