Dr. Sonja Jähnig - Researcher / Group Leader
Dr. Sonja Jähnig

Researcher

Dr. Sonja Jähnig is research group leader at the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB, Berlin), Department of Ecosystem Research. She holds a Diploma in Environmental Sciences and a PhD from University of Duisburg-Essen. Her research focuses on global change effects in river ecosystems, large scale patterns of freshwater biodiversity and river health, and traits and functions in river ecosystems. Sonja is and has been actively involved in a number of European and international projects funded e.g. by the DFG and BMBF (current: GLANCE), especially interested at the interface of hydrology and hydrobiology. In the Project AQUACROSS she is currently leading the work package 7 - Forecasting Biodiversity and Ecosystem Service Provision and is additionally involved into the WP 3, 4, 5 and 8.

Main research interests

  • Global change effects in river ecosystems
  • Large scale patterns in freshwater biodiversity and river health
  • Traits and functions in river ecosystems

Contact

T. +49 (0) 30 6392 4085

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Dr. Jens Kiesel - Researcher
Dr. Jens Kiesel

Researcher

Dr. Jens Kiesel is a Postdoc in the group of Dr. Sonja Jähnig. His main research interests are the simulation of hydrological, hydraulic and ecological processes in freshwater streams. He works on linking these components on different scales for simulating aquatic ecosystems. In the project GLANCE he is investigating the effects of global change on hydrologic and hydraulic processes.

Contact

T. +49 (0) 30 6392 4086

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Katherine Irving - PhD student
Katherine Irving

PhD student

Title of work: Improvement of Global Change Projections for Benthic Invertebrates

The primary focus is to further develop the predictive ability of Species Distribution Models for riverine benthic macro invertebrates.

  • The work aims to determine benthic macro invertebrate sensitivity to certain environmental conditions, the outcome of which will lead to a species-focused integration of the most influencing factors on distributional range.
  • The application of future projections of extreme hydrological events as well as land-use, will provide a more detailed depiction of river ecosystems leading to more conclusive estimates of benthic macro invertebrate range shifts.

"Understanding the drivers of benthic macro invertebrate distribution will be instrumental in aiding future management decisions and the mitigation of global change in rivers. The results of this study will further our ecological knowledge of benthic river communities under the influence of global change while also improving the predictive power of Species Distribution Models."

Contact


T. +49(30) 63924089
IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Karan Kakouei - PhD student
Karan Kakouei

PhD student

Title of work: Determination and quantification of flow traits of benthic invertebrates in running water systems

Although, the discharge of many rivers is expected to be decreasing worldwide due to climate change, surprisingly little empirical knowledge is available on the ecological requirements of benthic invertebrates living in these ecosystems. Being rather descriptive, these ecological traits are of limited value to quantify effects of changes in flow. Hence, we aimed to determine quantitative preferences of lotic invertebrates regarding flow conditions (“flow traits”) for Central Europe.

For that, we gathered two datasets:

  1. Long-term hydrological data recorded at 365 gauging stations in Germany: Hydrological data were characterized by 10 selected hydrological indices, providing information on magnitude, timing, duration, rate and frequency of changes in flow.
  2. Results from benthic invertebrate samples (774 sites) of Germany's rivers and streams.

By using hierarchical logistic regression modelling, we then identified invertebrate preferences for a variety of hydrological conditions, e.g. min./max./optimum response values for individual taxa.

"The results of this analysis enable a quantitative description of taxa responses to flow alteration, which represent valuable information for ecological modelling and predicting impacts of flow changes."

Contact

T. +49(30) 6392 4098

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Martin Friedrichs - PhD student
Martin Friedrichs

PhD student

Title of work:

 

Contact

T. +49 (0) 6392 4082

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Annett Wetzig - Technician
Annett Wetzig

Technician

 

Contact

T. +49(30) 6392 4075

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

IGB Webpage Profile

Dr. Simone Langhans - Researcher
Dr. Simone Langhans

Researcher

Dr. Simone Langhans is a postdoctoral fellow in the group of Dr. Sonja Jähnig at the Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Berlin, Germany. Simone was trained as a freshwater ecologist by ETH Zürich and Eawag in Switzerland and has additional experience in river rehabilitation, decision support theory and conservation planning. In her research she combines these topics to investigate alternative ways of solving complex environmental decision problems with a focus on freshwater management.

Titel of work: Cultural values in freshwater management: learning from Maori for European applications

Contact

T. +49(0)30 64181 943

IGB, Müggelseedamm 310, 12587 Berlin

Dr. Sami Domisch - Researcher
Dr. Sami Domisch

Researcher

Dr. Sami Domisch is a postdoctoral researcher in the working group of Dr. Sonja Jähnig in the EU-project AQUACROSS. Sami is interested in freshwater biogeography, with an emphasis on assessing the current status of freshwater biodiversity, as well as under potential environmental change scenarios on different spatial scales. He has a strong background in species distribution modeling, and is interested how these tools can be further developed within the freshwater realm for management and decision making.

 

 

Contact

T. +49(0)30 6392 4088

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

Fengzhi He PhD student - Smart Fellowship
Fengzhi He

PhD student - Smart Fellowship

Title of work: Biodiversity and risk patterns of freshwater megafauna

Characterized by long lifespan, late maturity and large-body size, freshwater megafauna are intrinsically more vulnerable to hunting pressures and ecosystem dysfunction. The aim of the doctoral research is to obtain a comprehensive picture of freshwater megafauna, focusing on biodiversity and risk patterns at global scale. We will try to track trends in population abundance of freshwater megafauna and investigate the sensitivity of their traits in dependence of anthropogenic threats.

Contact

T. +49 (0) 30 6392 4088

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

Vanessa Bremerich - Technician
Vanessa Bremerich

Technician

FIP - Freshwater Information Platform

 

Contact

T. +49 (0)30 6392 4081

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin

Dr. Alain Maasri - Guest Scientists
Dr. Alain Maasri

Guest Scientists

Research Faculty, the Academy of Natural Sciences of Drexel University - USA

Research interests

Community ecology, benthic stream ecology, macroinvertebrate trait analysis, chironomid ecology and biology.

Current research project

Collaborative Research: Hierarchical Functioning of River Macrosystems in Temperate Steppes - From Continental to Hydrogeomorphic Patch Scales

 

Contact

IGB, Justus-von-Liebig-Str. 7, 12489 Berlin