Jördis Franziska Terlau
· I am a young researcher with a keen interest in transdisciplinary research concepts, that are ranging from a philosophical background to the field of ecology in general, but with a distinct focus on climate change, metacommunity ecology, trophic interactions and understanding underlying mechanisms of ecosystem processes.
· I joined iDiv because I am looking for an interdisciplinary working environment with a great opportunity to develop my research career and to find my own niche in this wide field of research in biodiversity science.
· Before I started my PhD project, I worked on predator-prey interactions in ladybeetles and aphids. Particularly, I performed microcosm experiments examining the avoidance behavior of the pea aphid (Acyrthosiphon pisum) towards European native ladybeetle species and the in invasive non-native lady beetle Harmonia axyridis. Proceeding on the assumption that there is a missing or inadequately developed anti-predator response of native prey against novel non-native predators, non-native species should have competitive advantages over native species, which can contribute to invasion success.
· My current research foci are trophic interactions, colonization processes and underlying mechanisms of species movement patterns as well as trait-based metacommunity ecology and spatial between-patch processes.
Since February 2019
Doctoral researcher in the Theory in Biodiversity group at the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Germany
April 2016 - March 2018
Master of Science in Biodiversity and Conservation – Philipps-University Marburg, Germany
Thesis: Avoidance behaviour of the pea aphid Acyrthosiphon pisum confronted with cues of the invasive lady beetle Harmonia axyridis and four native lady beetle species.
October 2012 – March 2016
Bachelor of Science in Conservation Biology – University Koblenz-Landau, Landau, Germany
My Research Project
· Quantifying emigration as function of bottom up and top down control
· The colonization process of islands or habitat patches consists of several sub-processes like dispersal, establishment, immigration or emigration. This project concentrates on the underlying mechanisms of emigration. I am investigating the qualitative trait dependence of emigration, which is energetics of emigration. The stability and diversity of food webs is driven by the ratio of energy intake (feeding) and energy use (metabolic demands). The energy intake depends on resource quality, which is stoichiometry (e.g. compensatory feeding with decreasing food quality) as well as food quantity and predation risk.
I will measure the effect of both bottom up by resource quality (stoichiometry) and quantity (resource density in a patch) as well as top down pressure by predators of different body masses.
Additionally, I am cooperating with the Ecotron project. Here we look at moving patterns of macro-invertebrates between different patches of leaf litter of different stoichiometric quality (ash, oak, birch and mountain ash), which are separately arranged or all mixed up.
· The hypotheses are the following:
(a) Increasing resource quality (i.e. stoichiometry) will lead to decreased feeding and decreased emigration rates. (part I)
(b) Emigration of consumers is driven by the top down pressure of their predators. (part II).
The experiments will be performed as microcosm and/or mesocosm experiments including methods of RFID sensor tracking.
Unlu, A. G., Terlau, J. F., Bucher, R.(2020): Predation and avoidance behavior of the pea aphid Acyrthosiphon pisum confronted with native and invasive lady beetles in Europe. Biological Invasions