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Die Gefahr der Wiedereinführung invasiver Arten: ein neuer experimenteller Test mit zwei Arten aus ihrem Invasionsgebiet und ihrer Heimat

Description: Das Projekt "Die Gefahr der Wiedereinführung invasiver Arten: ein neuer experimenteller Test mit zwei Arten aus ihrem Invasionsgebiet und ihrer Heimat" wird vom Umweltbundesamt gefördert und von Eberhard Karls Universität Tübingen, Fachbereich Biologie, Institut für Evolution und Ökologie, Abteilung Vegetationsökologie durchgeführt. Disturbances are considered as a main factor structuring natural plant communities, since they may play a key role in determining plant species diversity. However, despite decades of research on the effects of disturbances on species coexistence, there is still a need for a generally applicable inclusive paradigm. In the proposed study, we address what we consider some of the most prominent obstacles to a generalized theory about the links between disturbance and plant species coexistence. Namely, we will investigate how the life history of plant species interacts with disturbances of different size and frequency, and how different disturbance types interact in altering competitive relationships between plants. In particular, we will - address the peculiarities of small-scale disturbances as opposed to larger ones in order to understand fundamental principles relating disturbance regime to vegetation dynamics across various scales; - test the hypothesis that co-occuiTing disturbances which act an different spatial and temporal scales show interactive and not just additive effects; - search for the key life history traits that determine the response of a species to a disturbance, - explicitly consider the species interactions under different disturbance regimes; - and test for the use of a plant functional type approach in scaling up from a species to a community response to disturbance. Our approach will be a combination of an extensive observational and experimental setup in the field and the greenhouse, and a computer-based simulation model of vegetation dynamics under differential disturbance. Our case study will be species-rich, wet meadows, where regular, large-scale disturbances occur as winter floods, and irregular, small-scale disturbances occur due to high mole activity. While moles constitute a very frequent disturbance agent in the Central European landscape, their role in determining plant species coexistence has not been studied in detail. Our overall results will greatly increase our understanding about how different disturbances interact in altering competitive hierarchies of plant species, and how specific life-history traits determines the plant's response to different disturbance types. Therefore, this study contributes largely to developing a generalized theory about the mechanisms linking disturbance and plant species coexistence.

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Origin: /Bund/UBA/UFORDAT

Tags: Maulwurf ? Tübingen ? Populationsdynamik ? Additive Wirkung ? Pflanzensoziologie ? Populationsökologie ? Vegetation ? Feuchtwiese ? Ökologie ? Pflanzengesellschaft ? Gewächshaus ? Hochwasser ? Main ? Invasive Arten ? Pflanzenart ? Wiederansiedlung ? Wetterkatastrophe ? Ackerland ? Artenvielfalt ? Simulation ? Studie ? Biosystem ? Evolution ? Fallstudie ? Wirkungsforschung ? Pflanze ? Weideland ? Salztonebene ? Unfall ? Landschaft ? Flora ? Biodiversität ? Forschung ? Naturkatastrophe ? Bepflanzung ? Wechselwirkung ? Diversität ? Art [Spezies] ? Maßstabsvergrößerung ? Naturgefahren und Naturrisiken ? Vermehrung ?

Region: Baden-Württemberg

Bounding box: 9° .. 9° x 48.5° .. 48.5°

License: cc-by-nc-nd/4.0

Language: Deutsch

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Time ranges: 2008-09-25 - 2010-11-25

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