at Google ScholarTitle data
Oberprieler, Christoph ; Lenz, Daniel ; Donhauser, Pia ; Bässler, Claus:
Surviving the extinction vortex? Discovering remnant stands of Senecio hercynicus (Compositae, Senecioneae) evading genetic swamping by its congener S. ovatus in the Bavarian and Bohemian Forest region.
In: Flora : Morphology, Distribution, Functional Ecology of Plants.
Vol. 320
(2024)
.
- 152602.
ISSN 0367-2530
DOI: https://doi.org/10.1016/j.flora.2024.152602
Abstract in another language
Genetic swamping by introgressive hybridisation threatens diversity, caused by climate warming particularly in mountainous regions worldwide. Recent studies resulted in a threatening perspective for Senecio hercynicus in the Bavarian Forest due to genetic swamping by introgressive hybridisation with its cogener S. ovatus. To examine the situation more closely, the distribution and hybridization of S. hercynicus and S. ovatus in high elevation regions of the Bavarian and Bohemian Forest was analyzed by restriction enzyme digestion of nrDNA ITS1 (PCR-RFLP; PCR restriction fragment length polymorphism). For a total of 706 samples from 94 different sample localities a hybrid index was inferred from the fragment band intensities after PCR-RFLP digestion. Boxplot diagrams of the hybrid indices show a tendency of western populations towards S. ovatus genotypes and for populations to the east towards S. hercynicus genotypes. When the hybrid index data was subjected to a regression analysis with nine factors (five habitat patterns inferred during sampling and four bioclimatic variables), only geographical longitude and latitude seemed to describe the observed distribution of S. hercynicus and S. ovatus significantly, arguing for the distribution and hybridisation patterns being shaped rather due to historical than to eco-climatological determinants. While a broad zone of hybridisation between the two species in the Bavarian and Bohemian Forest region was inferred, our study demonstrates that purebred S. hercynicus still exists and remnant stands of this species should be the target of species conservation measures.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | Asteraceae; Climate change; Hybridisation; Hybrid zone; Introgression; Phenology |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Fungal Ecology > Chair Fungal Ecology - Univ.-Prof. Dr. Claus Bässler Research Institutions > Central research institutes > Bayreuth Center of Ecology and Environmental Research- BayCEER |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 550 Earth sciences, geology 500 Science > 570 Life sciences, biology |
| Date Deposited: | 07 Nov 2024 07:00 |
| Last Modified: | 07 Nov 2024 07:00 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/90966 |