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GASIR2023

27-29 September 2023, University of Bayreuth (UBT)

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1 Trophic interactions, organic matter, and nutrient cycling

Mittwoch, 13:00-14:30, H 36

Prof. Dr. Johanna Pausch, Agroecology, BayCEER / UBT

Stable isotopes have revolutionized our understanding of trophic interactions and symbiosis in terrestrial and aquatic ecosystems. The use of isotopes enables the identification of food resource usage, trophic position within food webs, and geographic location of organisms. Isotope tracers are crucial to elucidating fluxes of nutrients through food webs, while bulk and compound-specific isotope analyses are essential for investigating trophic interactions within ecosystems. Deciphering trophic structures and resource partitioning has yielded vital insights into interactions within and between communities, their functions, and their vulnerability to disturbances.

We welcome contributions on new insights into trophic and symbiotic interactions and on the latest methodological developments for identifying and quantifying interactions within food webs and the linkages between organisms in terrestrial and aquatic ecosystems.

Keynote: Prof. Dr. Liliane Rueß; Department of Biology, Humboldt-Universität zu Berlin

 
13:00Keynote 1: Liliane Rueß: Stable isotopes in trophic ecology
13:30O 1.1: Claudia Guidi et al.: Tracing sources and turnover of soil organic matter in a long-term irrigated dry forest using a novel hydrogen isotope approach
13:45O 1.2: Guido Wiesenberg et al.: Combination of molecular markers and isotopes for improved assessment of the impact of warming on organic matter cycling in plant-soil systems
14:00O 1.3: Xiaolei Sun et al.: Depth distribution of phosphate 18O isotope values along the Paposo transect
14:15O 1.4: Franziska Zahn et al.: Do common shade-tolerant tropical tree and shrub saplings exhibit a partially mycoheterotrophic form of nutrition?
14:30Coffee
15:00

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Poster

P 1.1 Shaista Khaliq
Diet-consumer interactions under variable stressor conditions as revealed by stable isotope studies of individual amino acids
P 1.2 Jana Christine Koehne, Bernd Degen, Lasse Marohn, Buchen-Tschiskale Caroline
Pilot Study: Determining the geographic origin of European Eel with Stabile Isotopes (SI)
P 1.3 Franziska Zahn, Erik Söll, Thomas Chapin, Deyi Wang, Sofia Gomes, Nicole Hynson, Johanna Pausch, Gerhard Gebauer
Novel insights into orchid mycorrhiza functioning from stable isotope signatures of fungal pelotons

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