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

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

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

Dr. Alain Maasri - Scientists
Dr. Alain Maasri
I am a Postdoc in Dr. Sonja Jähnigs working group. I work at many levels in freshwater ecosystems, ranging from community ecology through ecosystem and aquatic landscape ecology and Macrosystem ecology. My preferred biological models are stream macroinvertebrates and Chironomids. I have a particular interest in community ecology, functional ecology and in understanding how communities are organized along river networks, and how they respond to the effects of global change. I have been working since 2010 in Mongolia and in the USA and I have extensive knowledge of large river ecosystems. Before that, during my Ph.D. research, I examined Mediterranean coastal river systems and trophic cascades in nutrient-enriched rivers. 
 
I am always interested in new collaborations and I am looking forward to new adventures!

 

Contact

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

IGB Webpage Profile

Dr. Fengzhi He - Researcher
Fengzhi He

My research interests include freshwater ecology, biogeography, and conservation biology. I received my MSc degree from Institute of Hydrobiology, Chinese Academy of Sciences and finished my PhD at Free University of Berlin and Queen Mary University of London. My PhD thesis focuses on diversity and risk patterns of freshwater megafauna. In the MegaCon project, I will continue to explore ecological functions of freshwater megafauna and their potential in functioning as flagship/umbrella species. In addition to freshwater megafauna, I am also interested in macroinvertebrate communities in streams and their response to environmental change.

 

Contact

T. +49 (0) 30 6392 4086

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

IGB Webpage Profile

Martin Friedrichs - PhD student
Martin Friedrichs

Species distribution models play an increasingly important role in modern nature conservation management as well as for effective nature conservation planning. SDMs allow estimations of the potential spatial distribution of species on large spatial scales. To make reliable use of predictions for nature conservation management and planning, it is necessary to record and minimise potential uncertainties. I am assessing the uncertainties in future distribution range predictions for fish species in river ecosystems using species distribution models. Especially, I focus on uncertainties arising from the modelled spatial (sub-basin size) and temporal scale (timeframe of species distribution data used). The overall aim is to use the gained knowledge to create nature conservation networks according to predicted species range shifts.

 

Title of work: Uncertainties in species distribution models: effects of spatial and temporal scales on future predictions

Contact

T. +49 (0) 6392 4098

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

IGB Webpage Profile

Xing Chen - PhD student
Martin Friedrichs

I am a PhD student in the working group of Dr. Sonja Jähnig. I get my master degree from Institute of Hydrobiology, Chinese Academy of Sciences in June 2019. The goal of my PhD thesis is to help us to understand the species invasion impact on freshwater megafauna and explore how freshwater megafauna species were introduced to non-native ranges and its relationship to species trait. Meanwhile, I focus on predicting future distributions of nonindigenous freshwater megafauna under future scenarios (such as climate change).

 

Title of work: Freshwater megafauna in a changing world: a nonindigenous-species perspective

 

 

Contact

T. +49 (0) 6392 4088

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

IGB Webpage Profile

Annett Wetzig - Technician
Annett Wetzig

Technician

 

Contact

T. +49(30) 6392 4087

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

IGB Webpage Profile

Vanessa Bremerich - Technician
Vanessa Bremerich

Technician

FIP - Freshwater Information Platform

 

 

Contact

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

IGB Webpage Profile

Lisa Heinrich - Student assistant
Lisa Heinrich

Student assistant

Studies Landscape Management and Nature Conservation at Eberswalde University for Sustainable Development

Contact

T. +49 (0)30 6392 4089

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