Johanna Häußler

Doctoral Researcher

Research Interest


Food webs (networks of populations which interact through predation) are classically investigated locally ignoring space. But these food webs are not isolated  and in addition to these local networks populations are also spatially connected to other habitats by migration or dispersal between them. Yet, so far there is no generalized understanding what determines the distribution of multi-trophic communities in space and how the emergence of these spatial networks is driven by local biodiversity and network structures.

In my PhD I therefore focus on providing answers to the questions:

- How will different trophic communities (e.g. forest vs meadow communities) arrange themselves on a spatial grid,

- How do to spatial processes drive biodiversity patterns and shape food-webs,

- How do changing environmental conditions (homogeneous and heterogeneous landscapes) affect the structure of these spatial and trophic networks,

by using computer simulations of multi-trophic communities on a spatial grid. In light of the ongoing anthropogenic land use change, I further aim to make predictions how habitat loss and habitat fragmentation will affect these biodiversity patterns and multi-trophic interactions.

Short CV


Since 2016
Doctoral researcher in the Theory in Biodiversity group at the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Germany and Friedrich-Schiller-University Jena, Germany

2015 – 2016

Research assistant at the Centre for Environmental and Climate Research, Lund University, Sweden


Field project on Bornean stream frog community composition, Sabah, Malaysian Borneo

2011 – 2014

MSc in Biology at the Julius Maximilian University of Würzburg, Germany with a  thesis on the joint effect of local land use and landscape structure on species diversity patterns

2010 – 2011

Courses in Forest Ecology and Analysis of Ecological Data at the Department of Ecology and Environmental Science, Umeå University, Sweden

2008 – 2011

BSc in Biology at Julius Maximilian University of Würzburg, Germany

iDiv publications


Brose, U., P. Archambault, A. D. Barnes, L.-F. Bersier, T. Boy, ..., C. Digel, A. Dissanayake, A. A. V. Flores, K. Fussmann, B. Gauzens, C. Gray, J. Häussler, M. R. Hirt, U. Jacob, ..., E. Latz, K. Layer-Dobra, P. Legagneux, Y. Li, ..., B. C. Rall, B. Rosenbaum, R. Ryser, A. Silva, E. H. Sohlström, ..., S. Wang, J. M. Wefer, ..., A. C. Iles

(2019): Predator traits determine food-web architecture across ecosystems. Nature ecology & evolution 3(6), 919-927 *

Ryser, R., Häussler, J., Stark, M., Brose, U., Rall, B. C., Guill, C.

(2019): The biggest losers: habitat isolation deconstructs complex food webs from top to bottom. Proceedings of the Royal Society B: Biological Sciences 286 *

Häussler, J., Sahlin, U., Baey, C., Smith, H. G., Clough, Y.

(2017): Pollinator population size and pollination ecosystem service responses to enhancing floral and nesting resources. Ecology and Evolution 7(6), 1898-1908
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Deutscher Platz 5e
04103 Leipzig

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3.209.2 (Interim I)

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+49 341 9733232
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Friedrich Schiller University Jena

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