Scientific highlights

Recreational fishing on social media | Habitat choice of pelagic bacteria | On the role of host genetics

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Our vision is the understanding of processes that shape the structure and functioning of water bodies and their biota. Our research findings help to predict responses to environmental change and to develop measures conductive to sustainable water management.

IGB is Germany’s largest and one of the leading international research centres for freshwaters. Here, hydrologists, biogeochemists, physicists, microbiologists, evolutionary ecologists, fish ecologists and fisheries biologists from all over the world are working under one roof.

News

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New policy brief on flood control

German scientists have summarised in a policy brief what smart flood protection should look like and what benefits nature-based solutions in particular provide. 
press release

Multiple stress for shallow lakes

Various pesticides, nitrate and climate warming – many stress factors for lakes and their creatures. A French-German research team has studied the individual and combined effects of these stressors on the food web of macrophytes, algae and microorganisms in shallow lakes. 

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IGB Annual Research Report 2021

Results and developments from one year of freshwater research
 

Selected Publications

May 2022
Biogeosciences. - 19(2022)9, 2465–2485

Modelling temporal variability of in situ soil water and vegetation isotopes reveals ecohydrological couplings in a riparian willow plot

Aaron Smith; Doerthe Tetzlaff; Jessica Landgraf; Maren Dubbert; Chris Soulsby

The authors used novel tracer-aided modelling of in-situ isotope data to quantify plant water sources and transit times, as well as dynamics and ages of soil water and root uptake in the critical zone of urban green spaces. This allowed to evaluate isotope mass balances, water partitioning, energy budgets, and biomass allocation under different landuse types (trees and grassland).

May 2022
Reviews in Fish Biology and Fisheries. - 32(2022), 687–700

Recreational angling and spearfishing on social media: insights on harvesting patterns, social engagement and sentiments related to the distributional range shift of a marine invasive species

Valerio Sbragaglia; Lucía Espasandín; Salvatore Coco; Alberto Felici; Ricardo A. Correia; Marta Coll; Robert Arlinghaus

The authors compared ecological and social dimensions of recreational angling and spearfishing targeting the invasive bluefish (Pomatomus saltatrix) in Italy using digital videos and their associated data. The study showcases the value of exploring social media to understand the ecological and human dimensions of marine recreational fisheries in relation to distributional range shifts of species.

May 2022
Limnology and Oceanography. - 67(2022)6, 1402-1415

Flexible habitat choice of pelagic bacteria increases system stability and energy flow through the microbial loop

Luis Alberto Villalba; Rajat Karnatak; Hans-Peter Grossart; Sabine Wollrab

The theoretical study evaluated the microbial dynamics of particle-associated vs free-living bacteria. Bacterial generalists have the ability to utilize both habitats and increase stability and energy transport through the 'microbial loop'. Adaptive response strategies of bacteria are important to assess the consequences of increasing particle loads, e.g., sediment and microplastics.

May 2022

Microbial Ecology

Host-Associated Bacterial Communities Vary Between Daphnia galeata Genotypes but Not by Host Genetic Distance

Amruta Rajarajan; Justyna Wolinska; Jean-Claude Walser; Stuart R. Dennis; Piet Spaak

The authors studied the role of host genetics in host-associated microbiome community structure. Gut and body microbiome composition still varied between Daphnia host genotypes, even though these Daphnia were kept under identical lab conditions for five years. This highlights the importance of host genetic component in microbiome structure.

May 2022
Science of the Total Environment. - 833(2022), Art. 155296

Antiparasitic potential of agrochemical fungicides on a non-target aquatic model (Daphnia× Metschnikowia host-parasite system)

Cláudia Machado; Ana P Cuco; Fernanda Cássio; Justyna Wolinska; Bruno B Castro

The authors investigated antiparasitic potential of 3 agrochemical fungicides on a non-target aquatic model (Daphnia × parasitic yeast system). The results suggest that azole fungicides may disrupt host-parasite interactions in natural systems. There might be broader consequences of this parasite-clearance effect, especially in face of increasing evidence that parasites are ecologically important.

Monitoring Stations

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