Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Spatial, environmental, and anthropogenic effect on the taxon composition of hybridizing Daphnia |
| Abstract | The competitive ability of hybrids, compared with their parental taxa, can cover a wide fitness range from poor to superior. For example communities of the Daphnia galeata-hyalina-cucullata species complex often show hybrid dominance. We tested whether taxa composition of 43 European lakes inhabited by this species complex can be explained by habitat characteristics (e.g. size descriptors, trophy level) or geography. We found that D. galeata occurs more frequently south of the Alps, whereas D. hyalina and D. cucullata are found more in the north. Lakes with D. galeata dominance had higher temperatures whereas D. hyalina dominance could be attributed to low phosphorus loads. The dominance of F1-hybrids, however, was not explainable with current environmental variables. In a subset of 28 lakes, we studied the impact of eutrophication history on F1-hybrid success. Lakes with the highest trophic state in the past tended to be dominated by F1-hybrids. Our data demonstrate that human-mediated habitat disturbance (eutrophication) has facilitated hybrid success and altered the Daphnia taxon composition across lakes. At the same time, specific habitat conditions might provide a refuge from hybridization for native genotypes. |
| Source | Proceedings - Royal Society. Biological sciences (Print) 363, pp. 2943–2952 |
| Keywords | hybrid superiorityenvironmental measurescoexistencedisturbanceeutrophication |
| Journal | Proceedings - Royal Society. Biological sciences (Print) |
| Editor | Royal Society., London, Regno Unito |
| Year | 2008 |
| Type | Articolo in rivista |
| DOI | 10.1098/rstb.2008.0044 |
| Authors | Keller B.; Wolinska J.; Manca M.; Spaak P. |
| Text | 53073 2008 10.1098/rstb.2008.0044 ISI Web of Science WOS 000258026400015 hybrid superiority environmental measures coexistence disturbance eutrophication Spatial, environmental, and anthropogenic effect on the taxon composition of hybridizing Daphnia Keller B.; Wolinska J.; Manca M.; Spaak P. 1Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Du¨bendorf, Switzerland 2Institute of Integrative Biology, ETH Zurich, 8092 Zurich, Switzerland 3CNR Institute for Ecosystem Studies ISE , 28922 Verbania Pallanza, Italy The competitive ability of hybrids, compared with their parental taxa, can cover a wide fitness range from poor to superior. For example communities of the Daphnia galeata hyalina cucullata species complex often show hybrid dominance. We tested whether taxa composition of 43 European lakes inhabited by this species complex can be explained by habitat characteristics e.g. size descriptors, trophy level or geography. We found that D. galeata occurs more frequently south of the Alps, whereas D. hyalina and D. cucullata are found more in the north. Lakes with D. galeata dominance had higher temperatures whereas D. hyalina dominance could be attributed to low phosphorus loads. The dominance of F1 hybrids, however, was not explainable with current environmental variables. In a subset of 28 lakes, we studied the impact of eutrophication history on F1 hybrid success. Lakes with the highest trophic state in the past tended to be dominated by F1 hybrids. Our data demonstrate that human mediated habitat disturbance eutrophication has facilitated hybrid success and altered the Daphnia taxon composition across lakes. At the same time, specific habitat conditions might provide a refuge from hybridization for native genotypes. 363 Spatial, environmental and anthropogenic effects HYBRIDS_2008.pdf Articolo in rivista Royal Society. 0962 8452 Proceedings Royal Society. Biological sciences Print Proceedings Royal Society. Biological sciences Print Proceedings. Print Proc. Royal Soc., Biol. sci. Print Proceedings of the Royal Society of London. Series B Print marinamarcella.manca MANCA MARINA MARCELLA DG.RSTL.094.012 Evoluzione della biodiversita e valutazione della banca degli stadi duraturi di organismi acquatici di laghi remoti |