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Invasive zebra mussel (Dreissena polymorpha) threatens an exceptionally large population of the depressed river mussel (Pseudanodonta complanata) in a postglacial lake (Dataset)
| Content Provider | Dryad |
|---|---|
| Author | Ożgo, Małgorzata Urbańska, Maria Hoos, Philipp Imhof, Hannes Kirschenstein, Malgorzata Mayr, Julia Michl, Florian Tobiasz, Rafał von Wesendonk, Marie Zimmermann, Stefan Geist, Juergen |
| Abstract | Freshwater mussels are in decline worldwide, with the depressed river mussel Pseudanodonta complanata being one of the rarest and most endangered species in Europe. Invasive mussels are suspected to be an important factor of decline, but there is little information on their interaction with native species. This study analysed densities, depth distribution and individual sizes and weights in one of the largest known populations of P. complanata in Europe in relation to the co-occurring invasive zebra mussel Dreissena polymorpha and other mussel species, using a systematic transect analysis. P. complanata was the dominant unionid species in Lake Siecino reaching densities of up to 26 ind. m-2, with half of the specimens found at a water depth of 2.0 – 4.0 m. Densities were highest on sandy substrates in areas of underwater currents. In contrast, 67% of native U. tumidus were found at depths < 1 m, indicating different habitat preference. In the study area, 91% of P. complanata, 92% of U. tumidus and all Anodonta individuals were fouled by D. polymorpha. The dreissenid:unionid mass-ratio (mean ± SD; maximum) was 0.43 ± 0.56; 22 and 0.86 ± 1.87; 8.76 in P. complanata and U. tumidus, respectively. P. complanata fouled with D. polymorpha were impaired in their anchoring capability and had shell deformations potentially affecting shell closing and filtration activity. Fouling intensity was negatively correlated with unionid density, potentially leading to accelerated population declines. The observed adverse effects of invasive zebra mussels on the depressed river mussel and the difficulties in eradicating established populations of invasive mussels suggest that D. polymorpha should be considered a serious threat to P. complanata. Therefore, the further spread of zebra mussels into habitats with native unionids needs to be avoided by all means. |
| File Size | 86096 |
| File Format | HTM / HTML |
| ISSN | 20457758 |
| DOI | 10.5061/dryad.12jm63xtr |
| Alternate Webpage(s) | https://datadryad.org/stash/downloads/file_stream/267658 |
| Language | English |
| Publisher Date | 2021-03-18 |
| Access Restriction | Open |
| Subject Keyword | Dreissena Polymorpha Pseudanodonta Complanata Freshwater Mussels |
| Content Type | Text |
| Resource Type | Data Set |
| Subject | Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation |
