Dengler Jürgen

Gentiana germanica im Jurapark Aargau - Genetische und vegetationsökologische Untersuchungen

Project Number: Parcs Data Center 50051 / 4D CH-7137

Project Type:	Bachelor
Project Duration:	01/01/2019 - 02/02/2019 project completed
Funding Source:	other ,
Leading Institution:	ZHAW, Institut für Umwelt und Natürliche Ressourcen
Project Leader:	Prof. Jürgen Dengler Forschungsgruppe Vegetationsökologie Institut Umwelt & Natürliche Ressourcen (IUNR) ZHAW Grüentalstr. 14 8820 Wädenswil Phone: +41 (0) 58 934 50 84 ; +41 (0) 58 934 59 10 FAX: +41 (0) 58 934 59 11 e-Mail: juergen.dengler(at)zhaw.ch https://www.zhaw.ch/de/ueber-uns/person/deng/

related to this project.

for which the project has a relevance.

Research Areas:

Biodiversity

Disciplines:

general biology

Abstract:
The Gentiana germanica Willd. is a vulnerable (VU) species listed on the Red List of threatened species in Switzerland. In the area of the Jurapark Aargau, CH, 15 G. germanica populations were analysed for their genetic diversity and their ecological habitat characteristics. It was investigated if a correlation exists between genetic structure and ecological and geographical distance. Additionally, the molecular approach was evaluated for its adequacy, to test the genetic diversity of different isolated populations. Based on the results, promotional measures for the species’ survival of G. germanica were determined. For this purpose, vascular plants and environmental parameters were recorded by means of vegetation surveys in the study area, with each plot measuring 10 m2. Based on these surveys, the mean ecological indicative values as well as the vegetation type were calculated. This was followed by a hierarchic cluster analysis for the ecological indicative values, the species list and the locations. Additionally, ten leaf samples were collected for each site. The genetic population diversity was tested with Inter Simple Sequence Repeat (ISSR) primers. Three relevant vegetation types could be identified (Mesobromion, Molinio-Pinion and Geranion sanguinei). No distinct correlation between either the genetic and the ecological distance or the genetic and geographical distance could be found. For each primer 6 to 36 DNA-bands were generated with a percentage of 22 - 80 % polymorphic loci (PL) per population. The results showed a high genetic variability. Thus, follows that in order to preserve the study species in the Jurapark Aargau seeds for seed propagation should be collected and foreign genetic material used in order to expand existing populations. Additionally, the site management should be adapted and the site’s appeal for pollinators should be increased.

Publications:
Vogel, N. (2019). Gentiana germanica im Jurapark Aargau - Genetische und vegetationsökologische Untersuchungen. Bachelorarbeit. Wädenswil: Zürcher Hochschule für Angewandte Wissenschaften ZHAW, Institut für Umwelt und natürliche Ressourcen.
PDF Bachelorarbeit


Last update: 8/11/22
Source of data: ProClim- Research InfoSystem (1993-2024)
Update the data of project: CH-7137

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