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9. Voralpine Seen und Trinkwasserversorgung durch Muscheln bedroht

Author

Spaak, Piet, primary, Alexander, Josephine, additional, Baehni, Lale, additional, Burlakova, Lyubov E., additional, Dennis, Stuart R., additional, Feulner, Philine G. D., additional, Flämig, Sylvie, additional, Haltiner, Linda, additional, Karatayev, Alexander, additional, Karatayev, Vadim A., additional, Kraemer, Benjamin M., additional, Rossbacher, Silvan, additional, and Stöckli, Raphael, additional

Published
2024
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11. An abundant future for quagga mussels in deep European lakes

Author

Kraemer, Benjamin M, primary, Boudet, Salomé, additional, Burlakova, Lyubov E, additional, Haltiner, Linda, additional, Ibelings, Bas W, additional, Karatayev, Alexander Y, additional, Karatayev, Vadim A, additional, Rossbacher, Silvan, additional, Stöckli, Raphael, additional, Straile, Dietmar, additional, and Spaak, Piet, additional

Published
2023
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26. Population genetic insights into establishment, adaptation, and dispersal of the invasive quagga mussel across perialpine lakes.

Author

Haltiner, Linda, Spaak, Piet, Dennis, Stuart R., and Feulner, Philine G. D.

Subjects
*MUSSELS, *LIFE history theory, *LAKES, *PHENOTYPIC plasticity, *PHYSIOLOGICAL adaptation, *BODIES of water, *LITTORAL zone
Abstract

Human activities have facilitated the invasion of freshwater ecosystems by various organisms. Especially, invasive bivalves such as the quagga mussels, Dreissena bugensis, have the potential to alter ecosystem function as they heavily affect the food web. Quagga mussels occur in high abundance, have a high filtration rate, quickly spread within and between waterbodies via pelagic larvae, and colonize various substrates. They have invaded various waterbodies across the Northern Hemisphere. In Central Europe, they have invaded multiple large and deep perialpine lakes with first recordings in Lake Geneva in 2015 and 2016 in Lake Constance. In the deep perialpine lakes, quagga mussels quickly colonized the littoral zone but are also abundant deeper (>80 m), where they are often thinner and brighter shelled. We analysed 675 quagga mussels using ddRAD sequencing to gain in‐depth insights into the genetic population structure of quagga mussels across Central European lakes and across various sites and depth habitats in Lake Constance. We revealed substantial genetic differentiation amongst quagga mussel populations from three unconnected lakes, and all populations showed high genetic diversity and effective population size. In Lake Constance, we detected no genetic differentiation amongst quagga mussels sampled across different sites and depth habitats. We also did not identify any convincing candidate loci evidential for adaptation along a depth gradient and a transplant experiment showed no indications of local adaptation to living in the deep based on investigating growth and survival. Hence, the shallow‐water and the deep‐water morphotypes seem to be a result of phenotypic plasticity rather than local adaptation to depth. In conclusion, our ddRAD approach revealed insight into the establishment of genetically distinct quagga mussel populations in three perialpine lakes and suggests that phenotypic plasticity and life history traits (broadcast spawner with high fecundity and dispersing pelagic larvae) facilitate the fast spread and colonization of various depth habitats by the quagga mussel. [ABSTRACT FROM AUTHOR]

Published
2024
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34. Environmentally independent selection for hybrids between divergent freshwater stickleback lineages in semi-natural ponds

Author

Hudson, Cameron Marshall, Cuenca Cambronero, Maria, Moosmann, Marvin, Narwani, Anita, Spaak, Piet, Seehausen, Ole, and Matthews, Blake

Subjects
570 Life sciences, biology
Abstract

Hybridization following secondary contact of genetically divergent populations can influence the range expansion of invasive species, though specific outcomes depend on the environmental dependence of hybrid fitness. Here, using two genetically and ecologically divergent threespine stickleback lineages that differ in their history of freshwater colonization, we estimate fitness variation of parental lineages and hybrids in semi-natural freshwater ponds with contrasting histories of nutrient loading. In our experiment, we found that fish from the older freshwater lineage (Lake Geneva) and hybrids outperformed fish from the younger freshwater lineage (Lake Constance) in terms of both growth and survival, regardless of the environmental context of our ponds. Across all ponds, hybrids exhibited the highest survival. Although wild-caught adult populations differed in their functional and defence morphology, it is unclear which of these traits underlie the fitness differences observed among juveniles in our experiment. Overall, our work suggests that when hybrid fitness is insensitive to environmental conditions, as observed here, introgression may promote population expansion into unoccupied habitats and accelerate invasion success.

Published
2023
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40. The distribution and spread of quagga mussels in perialpine lakes north of the Alps

Author

Haltiner, Linda, Zhang, Hui, Anneville, Orlane, De Ventura, Lukas, DeWeber, J. Tyrell, Hesselschwerdt, John, Koss, Michael, Rasconi, Serena, Rothhaupt, Karl-Otto, Schick, Roland, Schmidt, Brigitte, Spaak, Piet, Teiber-Siessegger, Petra, Wessels, Martin, Zeh, Markus, and Dennis, Stuart R.

Subjects
monitoring, Dreissena bugensis, Lake Constance, veliger phenology, Dreissena density, invasive species
Abstract

The dreissenids, quagga mussel Dreissena bugensis and zebra mussel D. polymorpha, are invasive freshwater mussels in Europe and North America. These species strongly impact aquatic ecosystems, such as the food web through their high abundance and filtration rate. They spread quickly within and between waterbodies, and have the ability to colonize various substrates and depths. The zebra mussel invaded and established in Swiss lakes in the 1960s, whereas the quagga mussel was not detected until 2014. We collected all available data from cantonal as well as local authorities and other institutions to describe the colonization pattern of quagga mussels in perialpine lakes north of the Alps. We also collected data regarding the distribution of larval stages of the mussels, the so-called veliger larvae. We observed that in lakes colonized by the quagga mussel, veligers are present the whole year round, whereas they are absent in winter in lakes with only zebra mussels. Additionally, we present detailed information about the invasion and colonization pattern of quagga mussels in Lake Constance. Quagga mussels colonized the lakeshore within a few years (~ 2016–2018), outcompeted zebra mussels, and have reached densities > 5000 ind. m-2 in the littoral zone, even at 80 m densities above 1000 ind. m-2 were found at some locations. At the end of the article, we discussed possibilities on how the spread of quagga mussels within and among northern perialpine lakes should be monitored and prevented in the future., Aquatic invasions, 17 (2), ISSN:1818-5487, ISSN:1798-6540

Published
2022

41. Fewer non‐native insects in freshwater than in terrestrial habitats across continents

Author

Sendek, Agnieszka; https://orcid.org/0000-0001-5337-9307, Baity‐Jesi, Marco; https://orcid.org/0000-0002-8723-906X, Altermatt, Florian; https://orcid.org/0000-0002-4831-6958, Bader, Martin K ‐F; https://orcid.org/0000-0002-3742-9762, Liebhold, Andrew M; https://orcid.org/0000-0001-7427-6534, Turner, Rebecca M; https://orcid.org/0000-0002-7885-3092, Roques, Alain; https://orcid.org/0000-0002-3734-3918, Seebens, Hanno; https://orcid.org/0000-0001-8993-6419, Spaak, Piet; https://orcid.org/0000-0003-0631-373X, Vorburger, Christoph; https://orcid.org/0000-0002-3627-0841, Brockerhoff, Eckehard G; https://orcid.org/0000-0002-5962-3208, Sendek, Agnieszka; https://orcid.org/0000-0001-5337-9307, Baity‐Jesi, Marco; https://orcid.org/0000-0002-8723-906X, Altermatt, Florian; https://orcid.org/0000-0002-4831-6958, Bader, Martin K ‐F; https://orcid.org/0000-0002-3742-9762, Liebhold, Andrew M; https://orcid.org/0000-0001-7427-6534, Turner, Rebecca M; https://orcid.org/0000-0002-7885-3092, Roques, Alain; https://orcid.org/0000-0002-3734-3918, Seebens, Hanno; https://orcid.org/0000-0001-8993-6419, Spaak, Piet; https://orcid.org/0000-0003-0631-373X, Vorburger, Christoph; https://orcid.org/0000-0002-3627-0841, and Brockerhoff, Eckehard G; https://orcid.org/0000-0002-5962-3208

Abstract

Aim Biological invasions are a major threat to biodiversity in aquatic and terrestrial habitats. Insects represent an important group of species in freshwater and terrestrial habitats, and they constitute a large proportion of non-native species. However, while many non-native insects are known from terrestrial ecosystems, they appear to be less represented in freshwater habitats. Comparisons between freshwater and terrestrial habitats of invader richness relative to native species richness are scarce, which hinders syntheses of invasion processes. Here, we used data from three regions on different continents to determine whether non-native insects are indeed under-represented in freshwater compared with terrestrial assemblages. Location Europe, North America, New Zealand. Methods We compiled a comprehensive inventory of native and non-native insect species established in freshwater and terrestrial habitats of the three study regions. We then contrasted the richness of non-native and native species among freshwater and terrestrial insects for all insect orders in each region. Using binomial regression, we analysed the proportions of non-native species in freshwater and terrestrial habitats. Marine insect species were excluded from our analysis, and insects in low-salinity brackish water were considered as freshwater insects. Results In most insect orders living in freshwater, non-native species were under-represented, while they were over-represented in a number of terrestrial orders. This pattern occurred in purely aquatic orders and in orders with both freshwater and terrestrial species. Overall, the proportion of non-native species was significantly lower in freshwater than in terrestrial species. Main conclusions Despite the numerical and ecological importance of insects among all non-native species, non-native insect species are surprisingly rare in freshwater habitats. This is consistent across the three investigated regions. We review hypotheses concerning sp

Published
2022

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