| Title | Spatial, environmental, and anthropogenic effect on the taxon composition of hybridizing Daphnia |
| Abstract | In general, hybrids are known to perform poorly compared with parental species. Under specific conditions, however, hybrids can be equally or more fit than their parents. For example communities of the Daphnia galeata-hyalina-cucullata species complex show often hybrid dominance. By studying habitat characteristics (e.g., size descriptors, trophy level) of
34 43 Swiss and North Italian lakes we found that D. galeata more frequently occurring in southern, whereas D. hyalina and D. cucullata are more present in northern lakes, a pattern which can not be explained by formerly described habitat preferences alone. In a subset of 28 lakes, we studied the impact of eutrophication history on F1-hybrid success. Lakes with the highest trophic stages in the past tended to be dominated by F1-hybrids. Our data demonstrates that human-mediated habitat disturbance (eutrophication) has facilitated hybrid success and altered the Daphnia taxa composition across lakes. At the same time, specific habitat conditions might provide a refuge from hybridization for native genotypes. |
| Source | Philosophical transactions - Royal Society. Biological sciences (Online), pp. 64–73 |
| Keywords | hybrid superiorityenvironmental measuresco-existencedisturbanceeutrophication |
| Journal | Philosophical transactions - Royal Society. Biological sciences (Online) |
| Editor | Royal Society., London, Regno Unito |
| Year | 2007 |
| Type | Articolo in rivista |
| Authors | Keller B.(1,2), Wolinska J.(3), Manca M., Spaak P.(1) |
| Text | 52981 2007 hybrid superiority environmental measures co existence disturbance eutrophication Spatial, environmental, and anthropogenic effect on the taxon composition of hybridizing Daphnia Keller B. 1,2 , Wolinska J. 3 , Manca M., Spaak P. 1 1 Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf,Switzerland; 2 Institute of Integrative Biology, ETH Zurich, 8092 Zurich, Switzerland; 3 Indiana University, Department of Biology, Bloomington, Indiana 47405, USA In general, hybrids are known to perform poorly compared with parental species. Under specific conditions, however, hybrids can be equally or more fit than their parents. For example communities of the Daphnia galeata hyalina cucullata species complex show often hybrid dominance. By studying habitat characteristics e.g., size descriptors, trophy level of 34 43 Swiss and North Italian lakes we found that D. galeata more frequently occurring in southern, whereas D. hyalina and D. cucullata are more present in northern lakes, a pattern which can not be explained by formerly described habitat preferences alone. In a subset of 28 lakes, we studied the impact of eutrophication history on F1 hybrid success. Lakes with the highest trophic stages in the past tended to be dominated by F1 hybrids. Our data demonstrates that human mediated habitat disturbance eutrophication has facilitated hybrid success and altered the Daphnia taxa composition across lakes. At the same time, specific habitat conditions might provide a refuge from hybridization for native genotypes. Published version Articolo in rivista Royal Society. 1471 2970 Philosophical transactions Royal Society. Biological sciences Online Philosophical transactions Royal Society. Biological sciences Online Philos. trans. R. Soc., Biol. sci. Online Philosophical transactions. Online marinamarcella.manca MANCA MARINA MARCELLA TA.P04.016.004 Ecologia teorica e applicata degli ecosistemi acquatici |
